Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.

   Refer to "GROUND INSPECTION ".

   Fig 1: Checking Ground Connections

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 2.
2. NG: Repair or replace ground connections.

With CONSULT-II 

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

   Switch	Monitor item	Condition	Indication
   MAIN switch	MAIN SW	Pressed	ON
   		Released	OFF
   CANCEL switch	CANCEL SW	Pressed	ON
   		Released	OFF
   RESUME/ACCELERATE switch	RESUME/ACC SW	Pressed	ON
   		Released	OFF
   SET/COAST switch	SET SW	Pressed	ON
   		Released	OFF

   Fig 2: CONSULT-II Display - Data Monitor

   Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II 

1. Turn ignition switch ON.
2. Check voltage between ECM terminal 99 and ground with pressing each button.
   ECM TERMINAL 99 AND GROUND
   
   

   Switch	Condition	Voltage [V]
   MAIN switch	Pressed	Approx. 1
   	Released	Approx. 4
   CANCEL switch	Pressed	Approx. 1
   	Released	Approx. 4
   RESUME/ACCELERATE switch	Pressed	Approx. 3
   	Released	Approx. 4
   SET/COAST switch	Pressed	Approx. 2
   	Released	Approx. 4

   Fig 3: Checking Voltage Between ECM Terminal 99 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO  8.
2. NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect ASCD steering switch harness connector.
4. Check harness continuity between ASCD steering switch terminal 2 and ECM terminal 67.

   Refer to Wiring Diagram .

   Continuity should exist  .

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

OK or NG 

1. OK: GO TO  5.
2. NG: GO TO 4.

Check the following.

• Harness connectors M135, F105
• Combination switch (spiral cable)
• Harness for open and short between ECM and ASCD steering switch

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

1. Check harness continuity between ECM terminal 99 and ASCD steering switch terminal 1. Refer to Wiring Diagram .

   Continuity should exist  .

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

OK or NG 

1. OK: GO TO  7.
2. NG: GO TO 6.

Check the following.

• Harness connectors M135, F105
• Combination switch (spiral cable)
• Harness for open and short between ECM and ASCD steering switch

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 8.
2. NG: Replace ASCD steering switch.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END