MIL ON - Transmission in Limp Home Mode
44-29DATE
9/95
MODEL
All 1995 MY with
ZF transmissions
Sedan Range VIN
720028 - 745840
XIS Range VIN
194775 - 222065
Transmission Control Module - DTC P1777 - Updated Module
ISSUE:
Some 1995 MY vehicles equipped with ZF automatic transmissions in the above VIN ranges may experience the following intermittent conditions:
1) Transmission Malfunction Indicator Lamp (MIL) flashing on and off.
2) Transmission enters limp home mode. Transmission MIL remains on. Code P1777 is stored in the Engine Control Module and the PDU cannot communicate with the Transmission Control Module.
ACTION:
If a customer complains of either condition on a 1995 MY vehicle equipped with a ZF automatic transmission, a revised Transmission Control Module is available as installed in production from VIN 745841 (Sedan Range) and 222066 (XJS Range).
1. If the car exhibits condition 1, install the revised TCM.
2. If the car exhibits condition 2, read out the OBD II DTC(s) using the PDU. If DTC P1777 is found in the Engine Control Module, and the PDU cannot communicate with the TCM, install the revised TCM.
3. Record the DTC(s) on the Diagnostic Trouble Code Report form 5-93.
TCM LOCATIONS
Sedan Range - The TCM is located under the passenger side under scuttle. Refer to repair operation 44.15.32 in subsection 8.1.3 of the XJ6 - XJ12 Vehicle Service Manual
XJS Coupe - The TCM is located behind the right rear quarter trim panel at the base of the B-pillar. Refer to repair operation 76.13.12 in the XJS Service Manual Volume 4, to remove the Rear Quarter Lower Trim Pad to gain access to the TCM.
XJS Convertible 2 + 2 - The TCM is located on the convertible top pump bracket in the trunk.
PARTS INFORMATION:
WARRANTY INFORMATION: