Automatic Transmission Shift Interlock System: Other Nissan Titan I

CHECKING OF A/T POSITION

Note. Following procedure will cover both column and floor shift selector levers.

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1. Place selector lever in "P" position, and turn ignition switch ON (engine stop).
2. Make sure selector lever can be shifted to other than "P" position when brake pedal is depressed. Also make sure selector lever can be shifted from "P" position only when brake pedal is depressed.
3. Move the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm the selector lever stops at each position with the feel of engagement when it is moved through all the positions. Check whether or not the actual position the selector lever is in matches the position shown by the shift position indicator and the transmission body.
5. The method of operating the lever to individual positions correctly should be as shown in the figure.
6. Confirm the back-up lamps illuminate only when lever is placed in the "R" position. Confirm the back-up lamps does not illuminate when selector lever is pushed against "R" position in the "P" or "N" position.
7. Confirm the engine can only be started with the selector lever in the "P" and "N" positions.
8. Make sure transmission is locked completely in "P" position.

Floor Shift

1. The electrical key interlock mechanism also operates as a shift lock: With the ignition switch turned to ON, the selector lever cannot be shifted from "P" (parking) to any other position unless the brake pedal is depressed. With the key removed, the selector lever cannot be shifted from "P" to any other position. The key cannot be removed unless the selector lever is placed in "P".
2. The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock solenoid and by the operation of the rotator and slider located inside the key cylinder, respectively.

Column Shift

1. The mechanical key interlock mechanism also operates as a shift lock: With the ignition switch turned to ON, the selector lever cannot be shifted from "P" (parking) to any other position unless the brake pedal is depressed. With the key removed, the selector lever cannot be shifted from "P" to any other position. The key cannot be removed unless the selector lever is placed in "P".
2. The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock solenoid and by the operation of the rotator and slider located inside the key cylinder.

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Note. Confirm that the pointer swings only momentarily because the output time is so short. If the inspection is done with an oscilloscope, it should be observed that the power source voltage lasts for 3.5 to 10 ms.

SYMPTOM 1

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

SYMPTOM 2

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

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1. CHECK SELECTOR LEVER POSITION Check the selector lever position for damage. OK or NG OK: GO TO 2. NG: Check selector lever. Refer to «ADJUSTMENT OF A/T POSITION»(ref-169926-S19398639362004121700000) .
2. CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH Connect A/T device harness connector. Turn ignition switch "ON". Selector lever is set in "P" position. Check operation sound. OK or NG OK: INSPECTION END NG: GO TO 3.
3. CHECK POWER SOURCE Turn ignition switch "ON". (Do not start engine.) Selector lever is in "P" position. Check the voltage between stop lamp switch connector E38 terminal 3 (G/R) and ground. OK or NG OK: GO TO 6. NG: GO TO 4.
4. CHECK STOP LAMP SWITCH Turn ignition switch "OFF". Disconnect stop lamp switch connector. Check continuity between stop lamp switch connector E38 terminals 3 and 4. Check stop lamp switch after adjusting brake pedal. Refer to «ADJUSTMENTS»(ref-163877-S11486847942004071500000) in DISC - TITAN article in BRAKES. OK or NG OK: GO TO 5. NG: Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM Check the following items. If any items are damaged, repair or replace damaged parts. Harness for short or open between fuse block (J/B) and stop lamp switch terminal 4 (G/R) Harness for short or open between stop lamp switch terminal 3 (G/R) and A/T device terminal 3 (G/R). 10A fuse [No. 12, located in the fuse block (J/B)] Ignition switch. OK or NG OK: GO TO 6. NG: Repair or replace damaged parts.
6. CHECK A/T DEVICE CIRCUIT Turn ignition switch "OFF". Disconnect A/T device connector. Check continuity between A/T device connector M68 terminal 1 and terminal 3. Connect A/T device connector. OK or NG OK: GO TO 7. NG: Replace shift lock solenoid or park position switch.
7. CHECK GROUND CIRCUIT Turn ignition switch "OFF". Disconnect stop lamp switch connector. Check continuity between A/T device connector M68 terminal 1 (B) and ground. Continuity should exist. OK or NG OK: Replace shift lock solenoid or park position switch. NG: Repair open circuit or short to power in harness or connectors.

Shift Lock Solenoid

1. Check operation by applying battery voltage to the A/T device.

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1. Check continuity between terminals of the A/T device.

For Shift

1. Check continuity between terminals of the A/T device.

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Key Lock

1. Check operation by applying battery voltage to key switch and key lock solenoid.

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Key Unlock

1. Check operation by applying battery voltage to key switch and key lock solenoid.

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1. Check continuity between terminals of the key switch and key lock solenoid.

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1. Check continuity between terminals of the stop lamp switch.

Check stop lamp switch after adjusting brake pedal.

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1. Unlock slider from adjuster holder and remove rod from cable.
2. Remove casing cap from bracket.
3. Disconnect the holder from the key cylinder and remove the key interlock cable.

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1. Set key interlock cable to key cylinder and install holder.
2. Set selector lever to P position.
3. Turn key to lock position.
4. Insert key interlock rod in to adjuster holder.
5. Install casing cap to bracket.
6. Move slider in order to lock adjuster holder to interlock rod.

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