Nissan Murano: Dtc/circuit Diagnosis / P1564 Ascd Steering Switch

DTC Description

DTC DETECTION LOGIC

1. An excessively high voltage signal from the ASCD steering switch is sent to ECM.

2. ECM detects that input signal from the ASCD steering switch is out of the specified range.

3. ECM detects that the ASCD steering switch is stuck ON.

POSSIBLE CAUSE

• Harness or connectors

  (The switch circuit is open or shorted.)

• ASCD steering switch

• ECM

FAIL-SAFE

Not applicable

CHECK DTC PRIORITY

If DTC P1564 is displayed with DTC P0605, first perform the confirmation procedure for DTC P0605.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Description.

GO TO 2.

PRECONDITIONING

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.

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.

3. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.

4. Press RES+ switch for at least 10 seconds, then release it and wait at least 10 seconds.

5. Press SET- switch for at least 10 seconds, then release it and wait at least 10 seconds.

6. Check DTC.

Is DTC detected?

Proceed to Diagnosis Procedure.

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

Confirmation after repair: INSPECTION END

CHECK DTC PRIORITY

If DTC P1564 is displayed with DTC P0605, first perform the confirmation procedure for DTC P0605.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Description.

GO TO 2.

CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT

1. Turn ignition switch ON.

2. Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with CONSULT.

3. Check each item indication under the following conditions.

   Monitor item	Condition		Indication
   MAIN SW	ON/OFF (MAIN) switch	Pressed	ON
   		Released	OFF
   CANCEL SW	CANCEL switch	Pressed	ON
   		Released	OFF
   RESUME/ACC SW	RES+ switch	Pressed	ON
   		Released	OFF
   SET SW	SET- switch	Pressed	ON
   		Released	OFF

Without CONSULT

1. Turn ignition switch ON.

2. Check the voltage between ECM harness connector terminals under the following conditions.

   ECM			Condition	Voltage (V)
   Connector	+	–
   	Terminal	Terminal
   E32	134	135	ON/OFF (MAIN) switch: Pressed	Approx. 0
   			CANCEL switch: Pressed	Approx. 1
   			SET- switch: Pressed	Approx. 2
   			RES+ switch: Pressed	Approx. 3
   			All ASCD steering switches: Released	Approx. 4

Is the inspection result normal?

INSPECTION END

GO TO 3.

CHECK ASCD STEERING SWITCH GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect combination switch harness connector M143.

4. Check the continuity between combination switch and ECM harness connector.

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   35	E32	135	Existed

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

Is the inspection result normal?

GO TO 4.

Repair or replace error-detected parts.

CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

1. Check the continuity between combination switch and ECM harness connector.

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   34	E32	134	Existed

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

Is the inspection result normal?

GO TO 5.

Repair or replace error-detected parts.

CHECK ASCD STEERING SWITCH

Check ASCD steering switch. Refer to Component Inspection.

Is the inspection result normal?

INSPECTION END

Replace ASCD steering switch. Refer to Removal and Installation.

CHECK ASCD STEERING SWITCH

1. Turn ignition switch OFF.

2. Disconnect combination switch (spiral cable) harness connector.

3. Check resistance between combination switch harness connector terminals as per the following.

   Combination switch		Condition	Resistance (Ω)
   Connector	Terminals
   M143	34 and 35	ON/OFF (MAIN) switch: Pressed	Approx. 0
   		CANCEL switch: Pressed	Approx. 250
   		SET- switch: Pressed	Approx. 660
   		RES+ switch: Pressed	Approx. 1,480
   		All ASCD steering switches: Released	Approx. 4,000

Is the inspection result normal?

INSPECTION END

Replace ASCD steering switch. Refer to Removal and Installation.