DTC P1777 - Transmission Control Module - New Module (SECTION 08.1, NO. 01)

Publication date: 1995-09-01
Reference number: SECTION 08.1, NO. 01

DTC P1777 - TRANSMISSION CONTROL MODULE - NEW MODULE

TECHNICAL SERVICE BULLETIN

Reference Number(s): SECTION 08.1, NO. 01

TRANSMISSION CONTROL MODULE - DTC P1777 - UPDATED MODULE

Model(s): 1995 Jaguar Sedan Range with AJ16 engine

Section: 8.1 - Automatic Transmission (AJ16)

Bulletin No.: 08.1-01

Date: September, 1995

APPLIED MODELS/VINS

1995 Jaguar Sedan Range, VIN 720001-745840

ISSUE

Some 1995 MY vehicles equipped with ZF automatic transmissions in the above VIN ranges may experience the following intermittent conditions:

Transmission Malfunction Indicator Lamp (MIL) flashing on and off.
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.

If the car exhibits condition 1, install the revised TCM.
If the car exhibits condition 2, read out the OD ll DTCs) 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.
Record the DTC(s) on the Diagnostic Trouble Code Report form S-93.

TCM LOCATION

The TCM is located under the passenger side underscuttle.

PARTS INFORMATION

Description	Part Number	Qty.
Transmission Control Module, Sedan Range	LHE 2400AH	004

WARRANTY INFORMATION

Fault Code	R.O. Number	Description	Time Allowance
FX CH FW	44.15.32	TCM, replace with diagnostic time	0.65 hrs.
FX CB GH	-----------	-------------------	--------------

Condition 1: Output to TCM Malfunction Indicator Lamp (MIL), Incorrect output

Condition 2: TCM, Inoperative