Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Repair or replace ground connection.

With CONSULT-III 

1. Turn ignition switch ON.
2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT-III.
3. Check each item indication under the following conditions.
   CONDITION REFERENCE
   
   

   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-III 

1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals as per the following.
   VOLTAGE REFERENCE
   
   

   ECM			Condition	Voltage (V)
   Connector	+	-
   	Terminal	Terminal
   M107	101 (ASCD steering switch signal)	108	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: GO TO  8.

   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.
   CONTINUITY REFERENCE
   
   

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   16	M107	108	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.
   CONTINUITY REFERENCE
   
   

   Combination switch	ECM		Continuity
   Terminal	Connector	Terminal
   13	M107	101	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 ".

Is the inspection result normal? 

YES: GO TO 8.

NO: Replace ASCD steering switch.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END