Nissan Pathfinder: Dtc/circuit Diagnosis (C053c Wheel Speed Sensor ... U2141 Can Comm Circuit)

• C053c Wheel Speed Sensor
• U0101 Can Comm Circuit
• U0122 Vehicle Dynamics Control Module
• U012e Engine Communication
• U0155 Can Communication (ipc)
• U0284 Active Grille Shutter
• U1000 Can Communication Circuit
• U1040 Eng Comm Circuit
• U1327 Mac Key
• U2118 Can Comm Circuit
• U2141 Can Comm Circuit

C053c Wheel Speed Sensor Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C053C	00	Wheel speed sensor (Wheel speed sensor generic range/performance)	Diagnosis condition	Engine running
			Signal	Nissan Pathfinder Vehicle speed signal
			Threshold	Wheel sensor signal is invalid.
			Diagnosis delay time	5 seconds

POSSIBLE CAUSE

• Wheel sensor

• ABS actuator and control unit (control unit)

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC C053C is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 9 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and let it idle for at least 5 seconds.

2. Check DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC C053C is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check DTC with ABS actuator and electric unit (control unit). Refer to DTC Index.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Perform trouble shooting relevant to DTC indicated.

CHECK WHEEL SENSOR

Check wheel sensor. Refer to DTC Diagnosis Procedure.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace malfunctioning part.

U0101 Can Comm Circuit Nissan Pathfinder 2025

DTC Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a Nissan Pathfinder vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U0101	00	LOST COMM (TCM) (Lost communication with TCM)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	CAN communication signal
			Threshold	ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) with TCM
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication line between TCM and ECM (CAN communication line is open or shorted)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.

Is DTC U0101 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

Proceed to Trouble Diagnosis Flow Chart.

U0122 Vehicle Dynamics Control Module Nissan Pathfinder 5th Gen

DTC Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a Nissan Pathfinder vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
U0122	00	VDC MDL (Lost communication with Nissan Pathfinder vehicle dynamics control module)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	CAN communication
			Threshold	When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) with ABS actuator and electric unit (control unit)
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Harness or connectors (CAN communication line is open or shorted)

FAIL-SAFE

When a DTC is detected, ECM executes a mode (in the Fail-safe mode) applicable to the DTC. The fail-safe mode has the preset traveling control mode (accelerator angle variation and engine output limit) and device fix mode.

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

INSPECTION END

DTC Diagnosis Procedure

Proceed to Trouble Diagnosis Flow Chart.

U012e Engine Communication Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U012E	00	Communication error (lost) (Lost communication with camshaft position control module)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Engine communication signal
			Threshold	Internal error of the electric intake valve timing control module is detected
			Diagnosis delay time	—

POSSIBLE CAUSE

• Electric intake valve timing control module

• ECM

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Device fix mode		Fixes electric intake valve timing control motor in the reference position. Fixes exhaust valve timing control solenoid valve in the reference position.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).
	Idle speed control	Stops feedback control of idle speed and controls with specified speed.
	Recovery speed control at decelerating	Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
	Idle neutral control	Stops idle neutral control.

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V when ignition switch ON.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and wait at least 5 seconds.

2. Check 1st trip DTC.

Is DTC U012E detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK ENGINE COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector and electric intake valve timing (IVT) control module harness connector.

3. Check the continuity between ECM harness connector and electric IVT control module harness connector.

   ECM		Electric IVT control module		Continuity
   Connector	Terminal	Connector	Terminal
   E32	189	F99	102	Existed
   	190		111

4. Check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

REPLACE ELECTRIC IVT CONTROL MODULE

1. Replace electric IVT control module. Refer to Removal and Installation.

2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.

Is DTC U012E detected again?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

U0155 Can Communication (ipc) Nissan Pathfinder SUV

DTC Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability. Many electronic control units are equipped onto a Nissan Pathfinder vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control unit is connected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less wiring. Each control unit communicates data but selectively reads required data only.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U0155	00	LOST COMM (METER) (Lost communication with instrument panel cluster (IPC) control module)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	A DTC is set if ECM cannot receive the CAN communication signals from combination meter.
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Harness or connectors

(CAN communication line is open or shorted.)

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If another “DTC CONFIRMATION PROCEDURE” is performed just before the next test, turn the ignition switch OFF and wait for 10 seconds or more, then perform the next test.

>>

GO TO 2.

CHECK DTC DETECTION

With CONSULT

1. Start the engine and wait for 2 seconds or more.

2. Check “Self Diagnostic Result” of “ENGINE”.

Is DTC U0155 detected?

YES>>

Go to DTC Diagnosis Procedure.

NO>>

Go to Intermittent Incident.

DTC Diagnosis Procedure

CHECK CAN COMMUNICATION CIRCUIT

Refer to Trouble Diagnosis Flow Chart.

Is the inspection result normal?

YES>>

Refer to Intermittent Incident.

NO>>

Repair or replace damaged parts.

U0284 Active Grille Shutter Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

When ECM cannot receive the engine communication signal from active grille shutter.

DTC No.		CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
U0284	00	LOST COMM (A/GRLL SHTTR MDL A) (Lost communication with active grille air shutter module A)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	Engine communication signal
			Threshold	ECM cannot receive the engine communication signal from active grille shutter
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness and connectors (Engine communication line is open or circuit shorted.)

• Active grille shutter

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC U0284 is displayed with another DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

If another DTC Confirmation Procedure is conducted just before this procedure, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 10 V or more with ignition switch ON.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC U0284 is displayed with another DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK ACTIVE GRILLE SHUTTER POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect active grille shutter harness connector.

3. Turn ignition switch ON.

4. Check the voltage between active grille shutter harness connector and ground as follows.

   +		−	Condition	Voltage (Approx.)
   Active grille shutter
   Connector	Terminal
   E202	1	Ground	Ignition switch: ON	Battery voltage
   			Ignition switch: OFF	0 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK ACTIVE GRILLE SHUTTER POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between active grille shutter harness connector and IPDM E/R harness connector.

   Active grille shutter		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   E202	1	E120	8	Existed

Is the inspection result normal?

YES>>

Perform trouble diagnosis for power supply circuit.

NO>>

Repair or replace the error-detected parts.

CHECK ACTIVE GRILLE SHUTTER GROUND CIRCUIT

1. Turn ignition switch OFF

2. Check the continuity between active grille shutter harness connector and ground.

   Active grille shutter		−	Continuity
   Connector	Terminal
   E202	4	Ground	Existed

3. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK ACTIVE GRILLE SHUTTER INPUT SIGNAL CIRCUIT

1. Disconnect ECM harness connector.

2. Check the continuity between ECM harness connector and active grille shutter harness connector.

+		–		Continuity
ECM		Active grille shutter
Connector	Terminal	Connector	Terminal
F79	167	E202	3	Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace the error-detected parts.

CHECK ACTIVE GRILLE SHUTTER

Check active grille shutter. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace active grille shutter. Refer to Removal and Installation.

U1000 Can Communication Circuit Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U1000	01	CAN COMM CIRCUIT (CAN communication circuit)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	CAN communication signal
			Threshold	Communication signal other than OBD (emission related diagnosis) is not received between electric intake valve timing control module and ECM
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

NOTE:

Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear DTC. Do not replace the ECM for a PAST DTC.

• Harness or connectors (Engine communication line is open or shorted)

• ECM

• Electric intake valve timing control module

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC U1000 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Perform diagnosis for P0607. Refer to DTC Description.

NO>>

GO TO 2.

PRECONDITIONING

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check 1st trip DTC.

Is DTC U1000 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC U1000 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Perform diagnosis of P0607. Refer to DTC Description.

NO>>

GO TO 2.

CHECK ENGINE COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect electric intake valve timing control module harness connector.

4. Check the continuity between ECM harness connector and electric intake valve timing control module harness connector.

   ECM		Electric intake valve timing control module		Continuity
   Connector	Terminal	Connector	Terminal
   E32	189	F99	102	Existed
   	190		111

5. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

REPLACE ELECTRIC INTAKE VALVE TIMING CONTROL MODULE

Replace electric intake valve timing control module. Refer to Removal and Installation.

>>

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE

1. Reconnect all harness connectors disconnected.

2. Turn ignition switch ON.

3. Erase DTC.

4. Perform DTC Confirmation Procedure.

   See DTC Description.

5. Check 1st trip DTC.

Is the DTC U1000 displayed again?

YES>>

GO TO 6.

NO>>

INSPECTION END

REPLACE ECM

Replace ECM. Refer to Removal and Installation.

>>

INSPECTION END

U1040 Eng Comm Circuit Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

When ECM unable to transmit engine communication signal.

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U1040	00	ENG COMM CIRCUIT (Engine communication circuit)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	Engine communication signal
			Threshold	ECM unable to transmit engine communication signal to generator
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (LIN communication circuit is open or shorted.)

• ECM

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If another DTC Confirmation Procedure is conducted just before this procedure, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 10 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

DTC Diagnosis Procedure

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK ACTIVE GRILLE SHUTTER SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect active grille shutter harness connector.

4. Check the continuity between ECM harness connector and active grille shutter harness connector.

   +		−		Continuity
   ECM		Active grille shutter
   Connector	Terminal	Connector	Terminal
   F79	167	E202	3	Existed

5. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

U1327 Mac Key Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U1327	52	MAC Key update (MAC Key update)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC key writing is incomplete.
			Diagnosis delay time	—
	54		Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC key is not written after ECM replacement.
			Diagnosis delay time	—

POSSIBLE CAUSE

U1327–52

• Network communication error between CONSULT and ECM

• ECM used in other vehicles is installed in the Nissan Pathfinder vehicle

• ECM

U1327–54

• Writing of MAC key has not been executed

• ECM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

U1327–52

CHECK DTC PRIORITY

If DTC U1327-52 is displayed with DTC U1327-54, first perform the trouble diagnosis for DTC U1327-54

Is DTC U1327-54 detected?

YES>>

Proceed to DTC U1327-54 DTC Description.

NO>>

GO TO 2

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Ignition switch ON.

2. Perform “MAC key writing”. Refer to Description.

3. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-52 detected as the current malfunction?

YES>>

Refer toDiagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

U1327–54

CHECK DTC PRIORITY

With CONSULT

1. Ignition switch ON.

2. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-54 detected as the current malfunction?

YES>>

Refer toDiagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

U1327–52

CHECK DTC PRIORITY

If DTC U1327-52 is displayed with DTC U1327-54, first perform the trouble diagnosis for DTC U1327-54.

Is DTC U1327 detected?

YES>>

Proceed to DTC Description.

NO>>

GO TO 2

PERFORM MAC KEY WRITING

With CONSULT

1. Perform “MAC key writing”. Refer to Description.

2. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-52 detected?

YES>>

GO TO 3

NO>>

INSPECTION END

REPLACE ECM

Replace ECM. Refer to Removal and Installation.

>>

INSPECTION END

U1327–54

PERFORM MAC KEY WRITING

With CONSULT

1. Perform “MAC key writing”. Refer to Description.

2. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-54 detected as the current malfunction?

YES>>

GO TO 2.

NO>>

INSPECTION END

PERFORM MAC KEY WRITING (SECOND TIMES)

With CONSULT

1. Restart CONSULT.

2. Perform “MAC key writing”. Refer to Description.

3. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-54 detected as the current malfunction?

YES>>

GO TO 3.

NO>>

INSPECTION END

PERFORM MAC KEY WRITING (THIRD TIMES)

With CONSULT

1. Restart CONSULT.

2. Perform “MAC key writing”. Refer to Description.

3. Perform “MAC Diagnosis” of “ENGINE” using CONSULT.

Is DTC U1327-54 detected as the current malfunction?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

U2118 Can Comm Circuit Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2118	87	CAN comm err (Intelligent Key) [CAN comm err (Intelligent Key)]	Diagnosis condition	Ignition switch ON
			Signal (terminal)	CAN communication signal
			Threshold	ECM is not transmitting or receiving CAN communication signal other than OBD (emission related diagnosis).
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

• Harness or connectors (CAN communication line is open or shorted)

• ECM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

CHECK DTC PRIORITY

If DTC U2118 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Proceed to DTC Description.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check 1st trip DTC.

Is DTC U2118 detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC U2118 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Proceed to DTC Description.

NO>>

Perform the trouble diagnosis for CAN communication system. Refer to Trouble Diagnosis Flow Chart.

U2141 Can Comm Circuit Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
U2141	57	CAN comm err (TCM) [CAN comm err (TCM)]	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	MAC communication error
			Diagnosis delay time	—
	87		Diagnosis condition	Ignition switch ON
			Signal (terminal)	CAN communication signal
			Threshold	ECM is not receiving CAN communication signal other than OBD (emission related diagnosis).
			Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

U2141–57

• MAC communication error

• ECM used in other vehicles is installed in the Nissan Pathfinder vehicle

• ECM

U2141–87

• Harness or connectors (CAN communication line is open or shorted)

• TCM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

U2141–57

CHECK DTC PRIORITY

If DTC U2141 is displayed with DTC U1327, first perform the trouble diagnosis for DTC U1327.

Is DTC U1327 detected?

YES>>

Proceed to DTC Description.

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

With CONSULT

1. Ignition switch ON.

2. Perform “MAC Diagnosis” mode of “ENGINE” using CONSULT.

Is DTC U2141 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

U2141–87

CHECK DTC PRIORITY

If DTC U2141 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Proceed to DTC Description.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check 1st trip DTC.

Is DTC U2141 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

U2141–57

CHECK DTC PRIORITY

If DTC U2141 is displayed with DTC U1327, first perform the trouble diagnosis for DTC U1327.

Is DTC U1327 detected?

YES>>

Proceed to DTC Description.

NO>>

GO TO 2.

CHECK MAC DIAGNOSIS

With CONSULT

1. Ignition switch ON.

2. Perform “MAC Diagnosis” mode of “ENGINE” using CONSULT.

Is DTC U2141 detected with DTC U214F, U2152(with ProPILOT),U2175 and U2176 at the same time?

YES>>

all DTC codes are detected at the same time: Replace ECM. Refer to Removal and Installation.

NO>>

all DTC codes are not detected at the same time: GO TO 3.

CHECK CAN COMMUNICATION SYSTEM

Perform trouble diagnosis of CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2141–87

CHECK DTC PRIORITY

If DTC U2141 is displayed with DTC P0607, first perform the confirmation procedure (trouble diagnosis) for DTC P0607.

Is DTC P0607 detected?

YES>>

Proceed to DTC Description.

NO>>

Perform the trouble diagnosis for CAN communication system. Refer to Trouble Diagnosis Flow Chart.