DTC Diagnosis Procedure

If DTC P1564 is displayed with DTC P0605 first perform the trouble diagnosis for DTC P0605.

Is applicable DTC detected?

YES

Perform diagnosis of applicable. Refer to DTC Description .

NO

GO TO 2.

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	MAIN switch	Pressed	ON
   		Released	OFF
   CANCEL SW	CANCEL switch	Pressed	ON
   		Released	OFF
   RESUME/ACC SW	ACCELERATE/RESUME switch	Pressed	ON
   		Released	OFF
   SET SW	COAST/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
   E77	134 (ASCD steering switch signal)	135	MAIN switch: Pressed	Approx. 0
   			CANCEL switch: Pressed	Approx. 1
   			COAST/SET switch: Pressed	Approx. 2
   			ACCELERATE/RESUME switch: Pressed	Approx. 3
   			All ASCD steering switches: Released	Approx. 4

Is the inspection result normal?

YES

GO TO 7.

NO

GO TO 3.

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

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   --	32	E77	135	Existed

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

Is the inspection result normal?

YES

GO TO 5.

NO

GO TO 4.

Check the following.

• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

Repair open circuit, short to ground or short to power in harness or connectors.

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

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   --	25	E77	134	Existed

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

Is the inspection result normal?

YES

GO TO 7.

NO

GO TO 6.

Check the following.

• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

Repair open circuit, short to ground or short to power in harness or connectors.

Refer to Component Inspection (ASCD Steering Switch) .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace ASCD steering switch.