Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

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

Is applicable DTC detected?

YES

Perform diagnosis of applicable. Refer to DTC Description .

NO

GO TO 2.

CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT

Turn ignition switch ON.
Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT.

Check each item indication under the following conditions.

Monitor item	Condition		Indication
MAIN SW	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

Turn ignition switch ON.

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

ECM			Condition	Voltage (V)
Connector	+	-
	Terminal	Terminal
E10	134	135	MAIN switch: Pressed	Approx. 0
			CANCEL switch: Pressed	Approx. 1
			SET/- switch: Pressed	Approx. 1.46
			RES/+ switch: Pressed	Approx. 2.26

Is the inspection result normal?

YES

INSPECTION END

GO TO 3.

CHECK ASCD STEERING SWITCH GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Disconnect combination switch harness connector M149.

Check the continuity between combination switch and ECM harness connector.

Combination switch	ECM		Continuity
Terminal	Connector	Terminal	Continuity
18	E10	135	Existed

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

Is the inspection result normal?

YES

GO TO 4.

Repair or replace error-detected parts.

CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

Check the continuity between combination switch and ECM harness connector.

Combination switch	ECM		Continuity
Terminal	Connector	Terminal	Continuity
15	E10	134	Existed

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

Is the inspection result normal?

YES

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?

YES

INSPECTION END

NO

Replace ASCD steering switch. Refer to Removal and Installation .