Nissan Pathfinder: Door & Lock - U214e-87 Can Comm Circuit

• Intelligent Key Unit
• Automatic Back Door Control Unit

Intelligent Key Unit Nissan Pathfinder Fifth generation

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Pathfinder vehicles are equipped with many electronic control units, 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-High line, CAN-Low line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to How to Use CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
U214E-87	CAN METER [CAN communication error (combination meter)]	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	Transmission error or reception error
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

1. Ignition switch ON and wait for 2 seconds or more.

2. Check “Self Diagnostic Result” mode of “HANDS FREE MODULE”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK CAN COMMUNICATION

Check CAN communication. Refer to Trouble Diagnosis Flow Chart.

Is DTC “U214E-87” displayed?

YES>>

Repair or replace the malfunctioning part.

NO>>

Check intermittent incident. Refer to Intermittent Incident.

Automatic Back Door Control Unit Nissan Pathfinder 5th Gen

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Pathfinder vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Pathfinder vehicles are equipped with many electronic control units, 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-High line, CAN-Low line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. CAN Communication Signal Chart. Refer to How to Use CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
U214E-87	Communication lost with METER [CAN communication error (combination meter)]	Diagnosis condition	Ignition switch ON
		Signal (terminal)	CAN communication signal
		Threshold	Automatic back door control unit is unable to receive the CAN communications signal from combination meter
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON and wait for 2 seconds or more.

2. Check “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

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

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK CAN COMMUNICATION

Check CAN communication. Refer to Trouble Diagnosis Flow Chart.

Is DTC “U214E-87” displayed?

YES>>

GO TO 2.

NO>>

Check intermittent incident. Refer to Intermittent Incident.

CHECK CONNECTOR

1. Ignition switch OFF.

2. Check the automatic back door control unit harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness or connector, securely lock the connector.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link.

CHECK TERMINAL

1. Ignition switch OFF.

2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.