MIL ON - A/T Stuck In 3rd/Instrument Cluster Inoperative

BULLETIN NUMBER:
SB01-04-S002

ISSUE DATE:
AUGUST 2001

GROUP:
ELECTRICAL

MALFUNCTION INDICATOR LAMP (MIL) ON,
TRANSMISSION STUCK IN THIRD GEAR,
INSTRUMENT CLUSTER INOPERATIVE (Replace Ignition Switch)

AFFECTED VEHICLES

1997 - 2000 Hombre pickup with 4L60-E Automatic Transmission

SERVICE INFORMATION

Condition:

Some customers may comment on one or more of the following conditions:

The Malfunction Indicator Lamp (MIL) is ON.

The transmission is stuck in third gear.

The instrument cluster is inoperative.

Upon investigation, one or all of the diagnostic trouble codes (DTCs) P0740, P0753, P0758, P0785, and P1860 may be set.

Possible Cause:

The most likely cause of this condition may be a loss of power to the transmission on circuit 1020. This loss of power may be caused by an open in the ignition switch. This condition may also be the result of an incorrect installation of an aftermarket electronic device such as a remote starter or alarm system.

Correction:

Follow the procedures in this bulletin for diagnosing if battery voltage is present at the fuse listed in the chart in step 1. Then follow the service procedures for diagnosing fault and repair as needed.





1. With the ignition switch in the RUN position, test for battery voltage at the appropriate fuse listed.

2. If battery voltage is present at the fuse, inspect circuit 1020 between the fuse and the transmission for possible opens. If battery voltage is not present at the fuse, replace the ignition switch using the ignition switch replacement procedure in the Steering Wheel and Column sub-section of the applicable Service Manual.

3. If the vehicle is equipped with an aftermarket electronic device (i.e., alarm or remote starter) and the DTCs are being set when the device is being used, verify that the appropriate fuse listed above is being supplied battery voltage during operation. If voltage is not present at this fuse, these DTCs will be set due to lack of power at the solenoids. This condition is most likely to occur with an incorrectly installed remote starting system. If this is the case, refer the customer to the installer of the system for corrections.





PARTS INFORMATION





Use the published labor operation shown.

Labor Time includes administrative time allowance.

This time is updated from the current Flat Rate Manual. The next ESI Flat Rate Manual update will contain this correction.

WARRANTY CLAIM SUBMISSION INFORMATION





For your convenience please use the information when submitting your warranty claim as shown.