Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM 1:

Selector lever cannot be moved from "P" position with key in ON position and brake pedal applied .
Selector lever can be moved from "P" position with key in ON position and brake pedal released .
Selector lever can be moved from "P" position when key is removed from key cylinder .

SYMPTOM 2:

Ignition key cannot be removed when selector lever is set to "P" position .
Ignition key can be removed when selector lever is set to any position except "P" .

CHECK KEY INTERLOCK CABLE
Check key interlock cable for damage.

OK or NG
1. OK: GO TO 2.
2. NG: Repair key interlock cable. Refer to "KEY INTERLOCK CABLE ".
CHECK SELECTOR LEVER POSITION
Check selector lever position for damage. Refer to "CHECKING OF A/T POSITION ".

OK or NG
1. OK: GO TO 3.
2. NG: Check selector lever. Refer to "ADJUSTMENT OF A/T POSITION ".

CHECK INPUT SIGNAL A/T DEVICE

Turn ignition switch "OFF".
Disconnect A/T device harness connector.
Turn ignition switch ON.

Check voltage between A/T device harness connector M156 terminal 1 and ground.

A/T DEVICE HARNESS CONNECTOR M156 TERMINAL 1 AND GROUND VOLTAGE

Terminals			Condition	Voltage (Approx.)
A			Condition	Voltage (Approx.)
A/T device connector	Terminal	(-)
M156	1	Ground	Depressed brake pedal	Battery voltage
M156	1	Ground	Released brake pedal	0V

Fig 1: Checking A/T Device Harness Connector M156 Terminal 1 And Ground Voltage

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

OK or NG

OK: GO TO 5.
NG: GO TO 4.

DETECT MALFUNCTIONING ITEM
Check the following.
1. Harness for short or open between ignition switch and stop lamp switch harness connector E38 terminal 3.
2. Harness for short or open between stop lamp switch harness connector E38 terminal 4 and A/T device harness connector M156 terminal 1.
3. 10A fuse. [No. 12, located in the fuse block (J/B)]
4. Stop lamp switch.
  - Check continuity between stop lamp switch harness connector E38 terminals 3 and 4.
    
    Fig 2: Checking Continuity Between Stop Lamp Switch Harness Connector E38 Terminals 3 And 4
    Courtesy of NISSAN MOTOR CO., U.S.A.
    
    Check stop lamp switch after adjusting brake pedal - refer to "BRAKE PEDAL ".
OK or NG
1. OK: GO TO 5.
2. NG: Repair or replace damaged parts.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness connector M156 terminal 2 and ground.
  Continuity should exist .
  
  If OK, check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 6.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  
  Fig 3: Checking Continuity Between A/T Device Harness Connector M156 Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK PARK POSITION SWITCH AND SHIFT LOCK SOLENOID CIRCUIT
Check continuity between A/T device harness connector M156 terminals 1 and 2.

Fig 4: Checking Continuity Between A/T Device Harness Connector M156 Terminals 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: INSPECTION END
2. NG:
  - Replace park position switch or shift lock solenoid.
  - Repair open circuit or short to ground or short to power in harness or connectors.