TPS - Multiple DTC's No Driveability Complaints

Classification:
EC98-005a

Reference:
ITB98-013a

Date:
July 15, 1998

DIAGNOSTIC PROCEDURE FOR DTCs P0120, P0510, P0731, P0732 OR P0733
WITH NO DRIVEABILITY INCIDENTS

This amended version of ITB98-013 updates the Parts and Claims Information. Please discard all paper copies of NTB98-013.

APPLIED VEHICLES:
1996 I30 (CA32)
1997 QX4 (JR5O)
1996-97 J30 (JY32)
1994-96 G20 (P10)

APPLIED DATES:
1996 I30 (All FED); (3/95 - 6/95 CAL)
All other models: All dates

APPLIED TRANSMISSION # s:
See Parts Information

SERVICE INFORMATION

If one of the above applied vehicles has a MIL "on" with P0120 (throttle position sensor), P0510 (closed throttle position switch), P0731 (A/T 1st), P0732 (A/T 2nd) or P0733 (A/T 3rd) stored in the ECM with no driveability or A/T shift quality incidents, the throttle position sensor (TPS) may be registering an inaccurate voltage at idle.

A countermeasure TPS is now available, if necessary, to resolve this incident. Use this bulletin to diagnose and repair this incident.

SERVICE PROCEDURE

1. Start the vehicle and warm up the engine (coolant temperature above 160° F).

2. Shut the engine off. Then turn the key to the ON position.





3. Using CONSULT, select THRTL P0S SEN in the Data Monitor mode (see Figure 1).

4. Note the TPS voltage (initial resting voltage).

5. Depress the accelerator fully and then release slowly until it releases completely.

6. Wait 5 seconds and monitor the TPS voltage again (final resting voltage). Note any change.

NOTE:
You may have to perform this procedure more than once to duplicate the incident.

A) If the final resting voltage is greater than the initial resting voltage, proceed to step 7.

B) If there is no measurable difference between the initial and final resting voltages, refer to the specific DTC diagnostic procedure in the appropriate service manual.





NOTE:
Figure 2 is a visual representation of the incident and is for reference only. It will be easier to perform this test based on the actual voltage values displayed (as in Figure 1) rather than to graph the voltage output. Use the actual voltage values to calculate the change.

For CA32 and JY32 models

7. Use the appropriate service manual procedure to replace the TPS with the countermeasure TPS from the Parts Information.

For P10 and JR50 models

7. Use the appropriate service manual procedure to replace the TPS with the countermeasure TPS. Also replace the automatic transmission control unit.

CAUTION:
Pay close attention to the TPS adjustment and resetting the Self Learning for the idle position memory. After installation if you adjust the new TPS incorrectly you may create additional MIL "on" or driveability issues.





PARTS INFORMATION

CLAIMS INFORMATION





If applicable, submit a Primary Failed Part (PP) line using the claims coding:

1. Reference the "Parts Information" table and select the indicated Throttle Position Switch P/N.

2. Reference the current Infiniti "Warranty Flat Rate Information" manual and select the indicated FRT for the vehicle being serviced.