A/T Torque Converter Lock-Up Shock: Control Module (ITB94-023)

Publication date: 1994-03-24
Reference number: ITB94-023

A/T TORQUE CONVERTER LOCK-UP SHOCK: CONTROL MODULE

TECHNICAL SERVICE BULLETIN

Reference Number(s): ITB94-023, Date of Issue: March 24, 1994

A/T TORQUE CONVERTER LOCK-UP SHOCK

Model(s): 1991-93 Infiniti Q45

Vehicles built before JNKNG01D* RM250083

Vehicles built before February, 1993

Classification: AT94-004

Section Automatic Transmission

Bulletin No.: ITB94-023

Date: March 24, 1994

SERVICE INFORMATION

If an owner of a 1991-93 Q45 vehicle complains of a harsh engagement or "shock" when the torque converter locks up (at about 42-45 mph in D4), the following procedures should be followed.

A new A/T control module is available which should reduce the severity of the lock-up engagement shock. This new module should be used for customer complaint of lock-up shock only. It is not intended as a general replacement of existing A/T control module part numbers. Please refer to Technical Bulletin ITB92-038 for part numbers to use during automatic transmission replacements.

SERVICE PROCEDURE

Check condition and fill level of transmission fluid (ATF). If the fluid level is outside the normal range on the dipstick, correct the fluid level and test drive the vehicle. If the fluid smells burned, follow Service Manual procedures to repair.
If the fluid level and condition check OK, use CONSULT to retrieve any stored trouble codes in Self-Diagnosis -- repair as necessary and test drive.
NOTE: If steps 1 and 2 don't resolve the incident, proceed to step 3.
Using CONSULT, verify the A/T control module part number for the vehicle and install the proper countermeasure A/T control module indicated below.
- FOR L991 AND 1992 MODELS WITH 2ND GEAR START: Former A/T ECM New A/T ECM 31036-64U11 31CI36-64U70 31036-64U12 31Cl36-64U70
- For 1993 models with 1st gear start: Former A/T ECM New A/T ECM 31036-64U20 31036-64U75
Test drive the vehicle to determine repair effectiveness.

If replacing the A/T control module does not resolve the incident, please contact your Regional Technical Specialist for furl her information.

WARRANTY INFORMATION

Operation	Op Code	PNC	CS	CT	FRT
Replace A/T control unit	JE34AA	31036	2K	31	0.3 hrs