Nissan Pathfinder: Dtc/circuit Diagnosis (P1575 Brake Switch ... P2101 Electric Throttle Control Function)

• P1575 Brake Switch
• P159f Active Grille Shutter
• P1603 Ecm
• P161d Immobilizer
• P1650 Starter Motor Relay 2
• P1800 Vias Control Solenoid Valve 1
• P1805 Stop Lamp Switch
• P1a10 Ecm Initial Learning Incomplete
• P2100 Throttle Control Motor Relay
• P2101 Electric Throttle Control Function

P1575 Brake Switch Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
P1575	00	BRAKE SW (BRAKE SW)	Diagnosis condition	—
			Signal (terminal)	CAN communication signal
			Threshold	Stop lamp switch signal is sent to ECM for extremely long time while the Nissan Pathfinder vehicle is being driven.
			Diagnosis delay time	—

POSSIBLE CAUSE

Stop lamp switch (BCM)

FAIL-SAFE

Not applicable

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.

>>

GO TO 2.

COMPONENT FUNCTION CHECK

With CONSULT

1. Turn ignition switch ON.

2. Select “DATA MONITOR” mode of “ENGINE” with CONSULT.

3. Check that the “BRAKE SW 2” indication as per the following condition.

   Monitor item	Condition		Indication
   BRAKE SW 2	Brake pedal	Fully released	OFF
   		Slightly depressed	ON

Without CONSULT

1. Turn ignition switch OFF.

2. Check the stop lamp when depressing and releasing the brake pedal.

   Brake pedal	Stop lamp
   Fully released	Not illuminated
   Slightly depressed	Illuminated

Is the inspection result normal?

YES-1>>

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

YES-2>>

Confirmation after repair: INSPECTION END

NO-2>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

PERFORM BCM DIAGNOSIS

Perform BCM diagnosis. Refer to DTC Index.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

P159f Active Grille Shutter Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

Active grille shutter normally stops within zone which is defined by zone (90°±10°).

If the active grille shutter stops within zone stuck error is detected, and if the active grille shutter stops at position beyond zone overrun error is detected.

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P159F	00	ACTIVE GRILLE AIR SHUTTER A (Active grille air shutter A)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	Detects the malfunction of initial position learning or operational malfunctions for specified times.
			Diagnosis delay time	—

POSSIBLE CAUSE

Foreign objects interferes with active grille shutter

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P159F is displayed with other DTC, first perform the trouble diagnosis for other DTC.

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 between 11V and 16V with ignition switch ON.

With CONSULT >>

GO TO 3.

Without CONSULT>>

GO TO 5.

DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch OFF and wait 10 seconds or more.

2. Turn ignition switch ON.

3. Select “ACTIVE GRILLE SHUTTER” in “ACTIVE TEST”of “ENGINE” using CONSULT.

4. Touch “CALIBRTN” and wait at least 30 seconds.

5. Check the 1st trip DTC.

Is 1st trip DTC is detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

GO TO 4.

CHECK THE OPERATION OF ACTIVE GRILLE SHUTTER

After the calibration completes, check the operation of active grille shutter as follows.

Condition	Active grille shutter
Select "CLOSE"	Open → Close
Select "OPEN"	Close→ Open

Is the inspection result normal?

YES-1>>

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

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to DTC Diagnosis Procedure.

DTC CONFIRMATION PROCEDURE

1. Drive the Nissan Pathfinder vehicle at 30 km/h (19 MPH) or more for at least 30 seconds.

2. Check DTC.

Is 1st trip DTC 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

CHECK DTC PRIORITY

If DTC P159F is displayed with other DTC, first perform the trouble diagnosis for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK ACTIVE GRILL SHUTTER

1. Turn ignition switch OFF.

2. Check if any foreign objects interferes with active grille shutter.

3. Check the installation condition of active grille shutter.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace the error-detected parts.

P1603 Ecm Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1603	00	CONTROL MODULE (CONTROL MODULE)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	EEPROM (built-in microcomputer) system internal ECM does not function properly
			Diagnosis delay time	—

POSSIBLE CAUSE

ECM

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

Perform the following procedure before performing DTC Confirmation Procedure.

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.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and wait at least 10 seconds.

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

3. Repeat steps 1 and 2 for 4 times.

4. Turn ignition switch ON.

5. Erase DTC.

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

7. Start the engine and wait for 10 seconds.

8. 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

INSPECTION START

Check that the battery negative terminal is not disconnected during ignition switch ON.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

ERASE DTC

1. Start the engine and let it idle at least 10 seconds.

2. Turn ignition switch OFF.

3. Repeat steps 1 and 2 for 4 times.

4. Erase DTC.

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

6. Start the engine and let it idle for 10 seconds.

7. Check 1st trip DTC.

Is DTC P1603 detected again?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Check ECM power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

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 5.

NO>>

Repair or replace error-detected parts.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to DTC Description.

Is the DTC P1603 detected again?

YES>>

Replace ECM. Refer to Removal and Installation.

NO>>

INSPECTION END

P161d Immobilizer Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

NOTE:

DTC P161D is displayed with another ECU.

Perform the trouble diagnosis for the corresponding DTC of another ECU. Refer to DTC Description.

FAIL-SAFE

Not applicable

P1650 Starter Motor Relay 2 Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1650	00	STR MTR RELAY 2 (Starter relay circuit)	A	Diagnosis condition	—
				Signal (terminal)	CAN communication signal
				Threshold	Starter relay is stuck ON.
				Diagnosis delay time	—
			B	Diagnosis condition	—
				Signal (terminal)	CAN communication signal
				Threshold	Starter relay power supply circuit is excessively high voltage.
				Diagnosis delay time	—
			C	Diagnosis condition	—
				Signal (terminal)	CAN communication signal
				Threshold	Starter relay circuit is excessively low voltage
				Diagnosis delay time	—

POSSIBLE CAUSE A

• Starter relay

• IPDM E/R

POSSIBLE CAUSE B

• Harness and connectors

  (Between IPDM E/R harness connector and battery is open.)

• IPDM E/R

POSSIBLE CAUSE C

• Harness and connectors

  (Starter relay circuit is open or shorted.)

• IPDM E/R

FAIL-SAFE

Engine Control System

Not applicable

Stop/Start System

When ECM detects error, ECM detects DTC, prohibits the start/stop system operation, and display the stop/start warning indicator.

When ECM detects error while operating the stop/start system, ECM restarts the engine.

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P1650 is displayed with DTC U1000 or P0607, first perform the confirmation procedure (trouble diagnosis) for DTC U1000 or P0607.

Is DTC U1000 or P0607 detected?

YES>>

Perform diagnosis of applicable.

• DTC U1000: Refer to DTC Description.

• DTC P0607: Refer to DTC Description.

NO>>

GO TO 2.

PRECONDITIONING

If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be turned OFF and wait for 10 seconds or more to start this procedure.

NOTE:

Before performing the following procedure, check that battery voltage is 12 V or more with ignition switch ON.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-1

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

2. Turn ignition switch ON and wait at least 30 seconds

3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

4. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Start the engine and warm it up to normal operating temperature.

2. Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

3. Touch “START” and operate stop/start system. (engine stop.)

4. Touch “CANCEL” and restart the engine.

Without CONSULT

Activate stop/start system. Refer to System Description.

CAUTION:

Always drive Nissan Pathfinder vehicle at a safe speed.

Is stop/start system activated normal?

YES-1>>

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

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P1650 is displayed with DTC U1000 or P0607, first perform the confirmation procedure (trouble diagnosis) for DTC U1000 or P0607.

Is DTC U1000 or P0607 detected?

YES>>

Perform diagnosis of applicable.

• DTC U1000: Refer to DTC Description.

• DTC P0607: Refer to DTC Description.

NO>>

GO TO 2.

CHECK IPDM E/R POWER SUPPLY CIRCUIT

Check IPDM E/R power supply circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 3.

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 4.

NO>>

Repair or replace error-detected parts.

REPLACE IPDM E/R

Replace IPDM E/R. Refer to Removal and Installation.

>>

INSPECTION END

P1800 Vias Control Solenoid Valve 1 Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1800	00	VIAS S/V CIRC-B1 (VIAS solenoid valve circuit bank 1)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	VIAS control solenoid valve 1 signal
			Threshold	An excessively low or high voltage signal is sent to ECM through the VIAS control solenoid valve 1
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (VIAS control solenoid valve 1 circuit is open or shorted.)

• VIAS control solenoid valve 1

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following 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 battery voltage is more than 11 V at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Check 1st trip DTC.

Is DTC P1800 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 VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect VIAS control solenoid valve 1 harness connector.

3. Turn ignition switch ON.

4. Check the voltage between VIAS control solenoid valve 1 harness connector and ground.

   +		−	Voltage
   VIAS control solenoid valve 1
   Connector	Terminal
   F66	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between VIAS control solenoid valve 1 harness connector and IPDM E/R harness connector.

   VIAS control solenoid valve 1		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F66	1	F24	78	Existed

4. Also check harness for short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK VIAS CONTROL SOLENOID VALVE 1 OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between VIAS control solenoid valve 1 harness connector and ECM harness connector.

   VIAS control solenoid valve 1		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F66	2	F79	163	Existed

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

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK VIAS CONTROL SOLENOID VALVE 1

Check VIAS control solenoid valve 1. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace VIAS control solenoid valve 1. Refer to Exploded View.

Component Inspection

CHECK VIAS CONTROL SOLENOID VALVE 1

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Disconnect vacuum hoses connected to VIAS control solenoid valve 1.

4. Turn ignition switch ON.

5. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VIAS S/V-1”.

6. Check air passage continuity and operation delay time under the following conditions.

Condition (VIAS S/V-1)	Air passage continuity between and	Air passage continuity between and
ON	Existed	Not existed
OFF	Not existed	Existed

Without CONSULT

1. Turn ignition switch OFF.

2. Disconnect VIAS control solenoid valve 1 harness connector.

3. Disconnect vacuum hoses connected to VIAS volume control solenoid valve 1.

4. Check air passage continuity and operation delay time under the following conditions.

   

Condition	Air passage continuity between and	Air passage continuity between and
12 V direct current supply between terminals 1 and 2	Existed	Not existed
No supply	Not existed	Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace VIAS control solenoid valve 1. Refer to Exploded View.

P1805 Stop Lamp Switch Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1805	00	BRAKE SW/CIRCUIT (Brake switch/circuit)	Diagnosis condition	—
			Signal (terminal)	CAN communication signal
			Threshold	A stop lamp switch signal is not sent to ECM while the Nissan Pathfinder vehicle is driving
			Diagnosis delay time	—

POSSIBLE CAUSE

Stop lamp switch (BCM)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Fully depress the brake pedal for at least 5 seconds.

3. Erase the DTC.

4. Check 1st trip DTC.

Is 1st trip DTC 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

PERFORM BCM DIAGNOSIS

Perform BCM diagnosis. Refer to DTC Index.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

P1a10 Ecm Initial Learning Incomplete Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1A10	00	ECM initial learning Incomplete (ECM initial learning Incomplete)	Diagnosis condition	Ignition switch ON
			Signal (terminal)	—
			Threshold	When drive distance will be less than 96 km (60 miles) and ECM keeps initial state to replace ECM will indicate DTC.
			Diagnosis delay time	—

POSSIBLE CAUSE

ECM initial learning not complete

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, 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 more than 11 V at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON.

2. Check 1st trip DTC.

Is 1st trip DTC 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

PERFORM ECM INITIAL LEARNING

1. Turn ignition switch ON. (Do not start the engine.)

2. Set selector lever to P position and apply parking brake.

3. Accelerator pedal is fully depressed and erase DTC.

4. Turn ignition switch OFF.

5. Check that no DTC is detected.

>>

INSPECTION END

P2100 Throttle Control Motor Relay Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2100	00	ETC MOT PWR-B1 (Throttle control motor relay circuit open)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Throttle control motor relay signal
			Threshold	A voltage of power source for throttle control motor is excessively low
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (Throttle control motor relay circuit is open)

• Throttle control motor relay

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.
Electric throttle control cancel mode		ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

DTC Confirmation Procedure

PRECONDITIONING

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

1. Ignition switch OFF and wait at least 10 seconds.

2. Ignition switch ON.

3. Ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8 V.

Which DTC is detected?

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2100

1. Ignition switch ON and wait at least 2 seconds.

2. Start engine and let it idle for 5 seconds.

3. Check DTC.

Is DTC P2100 detected?

YES>>

Proceed to Diagnosis Procedure.

NO>>

INSPECTION END

Diagnosis Procedure

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

1. Ignition switch ON.

2. Check the voltage between ECM harness connector and ground.

   +		−		Voltage
   ECM
   Connector	Terminal	Connector	Terminal
   F79	139	E32	204	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1. Disconnect ECM harness connector.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   ECM		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F79	139	F24	67	Existed

4. Also check harness for short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK FUSE

1. Ignition switch OFF.

2. Check that the following fuse is not blowing.

   Location	Fuse No.	Capacity
   IPDM E/R	#80	15A

Is the fuse blown (open)?

YES>>

Replace the fuse after repairing the applicable circuit.

NO>>

GO TO 4.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

Check the voltage between ECM harness connector and ground as per the following conditions.

ECM				Condition	Voltage (Approx.)
+		−
Connector	Terminal	Connector	Terminal
F79	95	E32	204	Ignition switch: OFF	0 V
				Ignition switch: ON	Battery voltage

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 5.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect IPDM E/R harness connector.

4. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   ECM		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F79	95	F24	72	Existed

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

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

P2101 Electric Throttle Control Function Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2101	00	ETC FNCTN/CIRC-B1 (Electric throttle control performance)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Throttle control motor signal
			Threshold	Electric throttle control function does not operate properly
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (Throttle control motor circuit is open or shorted)

• Electric throttle control actuator

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.
Electric throttle control cancel mode		ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P2101 is displayed with DTC P2100 or P2119, first perform the confirmation procedure (trouble diagnosis) for DTC P2100 or P2119.

Is DTC P2100 or P2119 detected?

YES>>

Perform diagnosis of applicable.

• DTC P2100: Refer to DTC Description.

• DTC P2119: Refer 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 more than 11 V when engine is running.

 

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 2 seconds.

2. Start engine and let it idle for 5 seconds.

3. Check DTC.

Is DTC P2101 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 P2101 is displayed with DTC P2100 or P2119, first perform the confirmation procedure for DTC P2100 or P2119.

Is DTC P2100 or P2119 detected?

YES>>

Perform diagnosis of applicable.

• DTC P2100: Refer to DTC Description.

• DTC P2119: Refer to DTC Description.

NO>>

GO TO 2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

Check the voltage between ECM harness connector terminals as per the following conditions.

ECM				Condition	Voltage (Approx.)
+		−
Connector	Terminal	Connector	Terminal
F79	139	E32	204	Ignition switch: OFF	0 V
				Ignition switch: ON	Battery voltage

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 3.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect IPDM E/R harness connector.

4. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   ECM		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F79	139	F24	67	Existed

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

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1. Check the continuity between ECM harness connector and IPDM E/R harness connector.

   ECM		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F79	95	F24	72	Existed

2. Also check harness for short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect electric throttle control actuator harness connector.

3. Disconnect ECM harness connector.

4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

   Electric throttle control actuator		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F50	2	F79	148	Existed
   			147	Not existed
   	1		148	Not existed
   			147	Existed

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

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Remove air duct hose and resonator assembly. Refer to Exploded View.

2. Check if foreign matter is caught between the throttle valve and the housing.

   

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Description.

CHECK THROTTLE CONTROL MOTOR

Check the throttle control motor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric throttle control actuator. Refer to Exploded View.

Component Inspection

CHECK THROTTLE CONTROL MOTOR

1. Turn ignition switch OFF.

2. Disconnect electric throttle control actuator harness connector.

3. Check the resistance between electric throttle control actuator terminals as per the following.

   Electric throttle control actuator		Condition		Resistance
   Terminal
   1	2	Temperature [°C (°F)]	25 (77)	1 – 15 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric throttle control actuator. Refer to Exploded View.