Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check ground connection E21. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

Is the inspection result normal?

YS: 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.
   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 connectors.
   TERMINALS VOLTAGE REFERENCE
   
   

   ECM		ECM		Condition	Voltage
   Connector	Terminal	Connector	Terminal
   E16	85 (ASCD steering switch signal)	E16	92 (Switch ground)	MAIN switch: Pressed	Approx. 0V
   				CANSEL switch: Pressed	Approx. 1V
   				SET/COAST switch: Pressed	Approx. 2V
   				RESUME/ACCELERATE switch: Pressed	Approx. 3V
   				All ASCD steering switches: Released	Approx. 4V

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 M352.
4. Check the continuity between combination switch and ECM harness connector.
   TERMINALS CONTINUITY REFERENCE
   
   

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   M352	18	E16	92	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.

• Harness connectors M77, E105
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

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

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

   Combination switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   M352	21	E10	85	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.

• Harness connectors M77, E105
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

  Repair open circuit or 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