Diagnosis Procedure

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.
   MONITOR ITEM CONDITION
   
   

   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 under the following conditions.
   VOLTAGE SPECIFICATION
   
   

   ECM			Condition	Voltage (V)
   Connector	+	-
   	Terminal	Terminal
   E80	128 (ASCD steering switch signal)	130	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  7.

   NO: GO TO 2.

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 SPECIFICATION
   
   

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   -	32	E80	130	Existed

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

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: GO TO 3.

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 SPECIFICATION
   
   

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   -	25	E80	128	Existed

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

   Is the inspection result normal? 

   YES: GO TO  6.

   NO: GO TO 5.

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: GO TO 7.

NO: Replace ASCD steering switch. Refer to "REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END