Diagnosis Procedure

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	RESUME/ACCELERATE switch	Pressed	ON
   		Released	OFF
   SET SW	SET/COAST 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
   E16	101 (ASCD steering switch signal)	108 (ASCD steering switch ground)	MAIN switch: Pressed	Approx. 0
   			CANCEL switch: Pressed	Approx. 1
   			SET/COAST switch: Pressed	Approx. 2
   			RESUME/ACCELERATE switch: Pressed	Approx. 3
   			All ASCD steering switches: Released	Approx. 4

   Is the inspection result normal? 

   YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

   NO: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector M303.
3. Disconnect combination switch harness connector.
4. Check the continuity between combination switch and ECM harness connector.

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   16	E16	108	Existed

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

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair or replace error-detected parts.

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

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   13	E16	101	Existed

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

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Repair or replace error-detected parts.

Check ASCD steering switch. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

NO: Replace ASCD steering switch. Refer to "ENGINE CONTROL SYSTEM: COMPONENT PARTS LOCATION ".