Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check ground connections M16, M70. Refer to "GROUND INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Repair or replace ground connections.

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 CHART
   
   

   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.
   Fig 1: Checking Voltage Between ECM Harness Connector Terminals

   Courtesy of NISSAN MOTOR CO., U.S.A.
   CONNECTOR TERMINAL VOLTAGE CHART
   
   

   ECM			Condition	Voltage (V)
   Connector	+	-
   	Terminal	Terminal
   M9	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 (spiral cable) harness connector.
4. Check the continuity between combination switch (spiral cable) harness connector and ECM harness connector.
   CONNECTOR TERMINAL CONTINUITY CHART
   
   

   Combination switch (spiral cable)		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   M303	18	M9	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 (spiral cable)

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

1. Check the continuity between combination switch (spiral cable) harness connector and ECM harness connector.
   CONNECTOR TERMINAL CONTINUITY CHART
   
   

   Combination switch (spiral cable)		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   M303	21	M9	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 (spiral cable)

  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 "DESCRIPTION ".

INSPECTION END