Nissan Murano: Automatic Drive Positioner :: Dtc/circuit Diagnosis / B2128 Uart Comm

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• UART communication line

  (UART communication line is open or shorted)

• Driver seat control unit

• Automatic drive positioner control unit

FAIL-SAFE

Only manual functions, except door mirror, operate normally.

SELF-DIAGNOSIS WITH AUTOMATIC DRIVE POSITIONER CONTROL UNIT

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “AUTO DRIVE POS.”.

3. Check DTC.

Is the DTC detected?

Perform diagnosis procedure. Refer to DTC Diagnosis Procedure.

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

Confirmation after repair: Inspection End.

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “AUTO DRIVE POS.”.

3. Erase the DTC.

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

Is the DTC displayed again?

GO TO 2.

Check intermittent incident. Refer to Intermittent Incident.

CHECK UART COMMUNICATION LINE CONTINUITY

1. Ignition switch OFF.

2. Disconnect driver seat control unit and automatic drive positioner control unit.

3. Check continuity between driver seat control unit harness connector and automatic drive positioner control unit harness connector.

   Driver seat control unit connector		Automatic drive positioner control unit connector		Continuity
   Connector	Terminal	Connector	Terminal
   B209	15	M33	8	Yes

4. Check continuity between driver seat control unit harness connector and ground.

   Driver seat control unit		Ground	Continuity
   Connector	Terminal
   B209	15		No

Is the inspection result normal?

Check intermittent incident. Refer to Intermittent Incident.

Repair or replace harness.