PR25DD engine

If DTC P1564 is displayed with DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B, first perform the trouble diagnosis for DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B.

Is applicable DTC detected?

YES

Perform diagnosis of applicable. Refer to DTC Index .

NO

GO TO 2.

With CONSULT

1. Turn ignition switch ON.
2. Select "CANCEL SW", "RES+ SW" and "SET- SW" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
3. Check each item indication as per 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

1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals.

   ECM			Condition	Voltage (Approx.)
   Connector	+	-
   	Terminal
   E31	144	145	MAIN switch: Pressed	0 V
   			CANCEL switch: Pressed	1 V
   			SET- switch: Pressed	2 V
   			RES+ switch: Pressed	3 V
   			All ASCD steering switches: Released	4 V

Is the inspection result normal?

YES

Check intermittent incident. Refer to Inspection .

NO

GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch (spiral cable) harness connector.
4. Check the continuity between combination switch (spiral cable) and ECM harness connector.

   +		-		Continuity
   Combination switch (Spiral cable)		ECM
   Connector	Terminal	Connector	Terminal
   M30	1	E31	145	Existed

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

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace error-detected parts.

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

   +		-		Continuity
   Combination switch (Spiral cable)		ECM
   Connector	Terminal	Connector	Terminal
   M30	8	E31	144	Existed

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

Is the inspection result normal?

YES

GO TO 5.

NO

Repair or replace error-detected parts.

Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Inspection .

NO

Replace ASCD steering switch. Refer to Component Location .