TCM Self-Diagnostic Procedure (No Tools): Preparation

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. 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).

Fig 1: Identifying Vacuum Pump

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

Disconnect the throttle position switch harness connector.
Turn ignition switch to "ON" position.
Check continuity of the closed throttle position switch.
Continuity should exist.

(If continuity does not exist, check throttle opener and closed throttle position switch. Then increase vacuum until closed throttle position switch shows continuity.)

Fig 2: Checking Continuity Of Throttle Position Switch
Courtesy of NISSAN MOTOR CO., U.S.A.
Go to "DIAGNOSIS START" on next page.

CHECK O/D OFF INDICATOR LAMP
- Start the engine with selector lever in "P" position. Warm engine to normal operating temperature.
- Turn ignition switch to "OFF" position.
- Wait 5 seconds.
  
  Fig 3: Moving Selector Lever In P Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
- Turn ignition switch to "ON" position.
  (Do not start engine.)
- Does O/D OFF indicator lamp come on for about 2 seconds?
  
  Fig 4: Identifying O/D Off Indicator Lamp
  Courtesy of NISSAN MOTOR CO., U.S.A.
Yes or No
1. Yes: GO TO 2.
2. No: Stop procedure. Perform "O/D OFF Indicator Lamp Does Not Come On ", before proceeding.
JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch to "OFF" position.
2. Push shift lock release button.
3. Move selector lever from "P" to "D" position.
4. Turn ignition switch to "ON" position. (Do not start engine.)
5. Wait 3 seconds.
6. Push the overdrive control switch in "O/D OFF" position (the O/D OFF indicator lamp will be "ON") If O/D OFF indicator lamp does not come on, go to step 5 on VEHICLE DOES NOT DECELERATE BY ENGINE BRAKE .
7. Turn ignition switch to "OFF" position.
  
  Fig 5: Moving Selector Lever From "P" To "D" Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
8. Turn ignition switch to "ON" position (Do not start engine.).
9. Push the overdrive control switch in "O/D ON" position (the O/D OFF indicator lamp will be "OFF").
10. Wait 2 seconds.
11. Move selector lever to "2" position.
12. Push the overdrive control switch in "O/D OFF" position (the O/D OFF indicator lamp will be "ON").
13. Push the overdrive control switch in "O/D OFF" position (the O/D OFF indicator lamp will be "OFF").
  
  Fig 6: Moving Selector Lever To "2" Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. : GO TO 3.
JUDGEMENT PROCEDURE STEP 2
1. Move selector lever to "1" position.
2. Push the overdrive control switch in "O/D OFF" position (the O/D OFF indicator lamp will be "ON").
3. Push the overdrive control switch in "O/D ON" position (the O/D OFF indicator lamp will be "OFF").
4. Push the overdrive control switch in "O/D OFF" position (the O/D OFF indicator lamp will be "ON").
  
  Fig 7: Moving Selector Lever To "1" Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
5. Depress accelerator pedal fully and release it.
6. Push the overdrive control switch (the O/D OFF indicator lamp will begin to flash "ON" and "OFF").
  
  Fig 8: Depressing Accelerator Pedal
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. : GO TO 4.
CHECK SELF-DIAGNOSIS CODE
Check O/D OFF indicator lamp.

Refer to "JUDGEMENT OF SELF-DIAGNOSIS CODE ", .

Fig 9: Identifying O/D Off Indicator Lamp
Courtesy of NISSAN MOTOR CO., U.S.A.
1. : DIAGNOSIS END