TCM Self-diagnostic Procedure (No Tools): Preparation

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch to OFF position.
Connect the handy type vacuum pump to the throttle opener and apply vacuum -25.3 kPa (-190 mmHg, -7.48 inHg).
Disconnect the throttle position switch harness connector.
Turn ignition switch to ON position.
Check continuity of the closed throttle position switch.
Continuity should exist .

Fig 1: Confirming Throttle Opener & Closed Throttle Position Switch Operation
Courtesy of NISSAN MOTOR CO., U.S.A.

(If continuity does not exist, check throttle opener and closed throttle position switch. Then increase vacuum until closed throttle position switch shows continuity.)
Go to test group 1 , CHECK O/D OFF INDICATOR LAMP.

CHECK O/D OFF INDICATOR LAMP
1. Move A/T selector lever to P position.
  Start the engine.
  
  Warm engine to normal operating temperature.
2. Turn ignition switch to OFF position.
3. Wait 5 seconds.
4. Turn ignition switch to ON position.
  (Do not start engine.)
5. Does O/D OFF indicator lamp come on for about 2 seconds?
  
  Fig 2: Locating O/D Off Indicator Lamp
  Courtesy of NISSAN MOTOR CO., U.S.A.
Yes or No

Yes: GO TO 2.

No: GO TO 1. O/D OFF INDICATOR LAMP DOES NOT COME ON .
JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch to OFF position.
2. Turn ignition switch to ACC position.
3. Move A/T selector lever from P to D position.
4. Turn ignition switch to ON position.
  (Do not start engine.)
5. Depress and hold overdrive control switch (the O/D OFF indicator lamp will be ON) until directed to release the switch.
  If O/D OFF indicator lamp does not come on, go to 21. TCM SELF-DIAGNOSIS DOES NOT ACTIVATE (PNP, OVERDRIVE CONTROL AND THROTTLE POSITION SWITCHES CIRCUIT CHECKS) .
6. Turn ignition switch to OFF position.
7. Turn ignition switch to ON position.
  (Do not start engine.)
8. Release the overdrive control switch (the O/D OFF indicator lamp will be OFF).
9. Wait 2 seconds.
10. Move A/T selector lever to 2 position.
11. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be ON).
12. Depress and hold the overdrive control switch (the O/D OFF indicator lamp will be OFF) until directed to release the switch.
  GO TO 3.
JUDGEMENT PROCEDURE STEP 2
1. Move A/T selector lever to 1 position.
2. Release the overdrive control switch.
3. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be ON).
4. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be OFF).
5. Depress and hold the overdrive control switch (the O/D OFF indicator lamp will be ON) until directed to release the switch.
6. Depress accelerator pedal fully and release.
7. Release the overdrive control switch (the O/D OFF indicator lamp will begin to flash ON and OFF).
  GO TO 4.
CHECK SELF-DIAGNOSIS CODE
Check O/D OFF indicator lamp. Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE .

Fig 3: Locating O/D Off Indicator Lamp
Courtesy of NISSAN MOTOR CO., U.S.A.

DIAGNOSIS END