Diagnostic Procedure

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

   Refer to "GROUND INSPECTION ".

   Fig 1: Locating Body Ground Screws

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

OK or NG 

OK: GO TO 2.

NG: Repair or replace ground connections.

With CONSULT-II 

1. Turn ignition switch ON.
2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT-II.
Fig 2: CONSULT-II Display - DATA MONITOR
Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check each item indication under the following conditions.
   MONITOR ITEM CONDITION SPECIFICATION
   
   

   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

Without CONSULT-II 

1. Turn ignition switch ON.
2. Check voltage between ECM terminal 99 and ground with pressing each button.
   Fig 3: Checking Voltage Between ECM Terminal 99 And Ground

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

   Switch	Condition	Voltage [V]
   MAIN switch	Pressed	Approx. 0
   	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

OK or NG 

OK: GO TO  8.

NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect combination switch harness connector M102.
3. Disconnect ECM harness connector.
Fig 4: Identifying ASCD Steering Switch
Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check harness continuity between combination switch terminal 15 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 

OK: GO TO  5.

NG: GO TO 4.

Check the following.

• Harness connectors M31, E152
• Harness connectors E5, F14
• 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 harness continuity between ECM terminal 99 and combination switch terminal 14.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

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

OK or NG 

OK: GO TO  7.

NG: GO TO 6.

Check the following.

• Harness connectors M31, E152
• 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 ".

OK or NG 

OK: GO TO 8.

NG: Replace ASCD steering switch. Refer to "REMOVAL AND INSTALLATION OF STEERING WHEEL AUDIO CONTROL SWITCHES ".

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END