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Home >> Nissan-Datsun >> 2008 >> Frontier 2WD L4-2.5L (QR25DE) >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> A/T Shift Lock System
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A/T Shift Lock System

A/T SHIFT LOCK SYSTEM

Diagnosis Procedure

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".

1.CHECK KEY INTERLOCK CABLE
Check key interlock cable for damage.
OK or NG
OK >> GO TO 2.
NG >> Repair key interlock cable.

2.CHECK SELECTOR LEVER POSITION
Check selector lever position for damage. Refer to TM-354, "Inspection and Adjustment". Adjustments
OK or NG
OK >> GO TO 3.
NG >> Check selector lever. Refer to TM-354, "Inspection and Adjustment". Adjustments

3.CHECK INPUT SIGNAL A/T DEVICE
1. Turn ignition switch "ON".





2. Check voltage between A/T device harness connector M156 terminal 1 and ground.
Voltage
Depressed brake pedal: Battery voltage
Released brake pedal: Approx. 0V
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.

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 terminals 3 and 4.





Check stop lamp switch after adjusting brake pedal.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.

5.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
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

6.CHECK PARK POSITION SWITCH AND SHIFT LOCK SOLENOID CIRCUIT
Check continuity between A/T device terminals 1 and 2.





OK or NG
OK >> INSPECTION END
NG >> ^ Replace park position switch or shift lock solenoid.
^ Repair open circuit or short to ground or short to power in harness or connectors.

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