For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: This table diagnoses the shift lever never being locked with the ignition switch in ON.
1 | Were you sent here from the Brake Transmission Shift Interlock System Check? | -- | Go to Step 2 | Go to Automatic Transmission Shift Lock Control System Check
2 |

1. Disconnect the shift lock control module connector.
2. Disconnect connector C3 of junction block 2.
3. Test for a short to B+ in cavity 2 of the shift lock control module using a J 39200 .

Was a short to B+ condition measured in the GRN/WHT wire?

--

Go to Step 3

Go to Step 4

3 | Repair the short to B+ condition in the GRN/WHT wire between cavity 2 of the shift lock control module and cavity 1 of the stoplamp switch. Is the repair complete? | -- | Go to Automatic Transmission Shift Lock Control System Check | --
4 | Test for continuity between cavity 7 of connector C3 of junction block 2 and cavity 2 of the shift lock control module connector. Is there continuity? | -- | Go to Step 5 | Go to Step 6
5 | Replace/adjust the stoplamp switch. Refer to Stop Lamp Switch Replacement or Stop Lamp Switch Adjustment in Hydraulic Brakes. Is the replacement or adjustment complete? | -- | Go to Automatic Transmission Shift Lock Control System Check | --
6 | Replace the shift lock control module. Refer to Shift Lock Control Module Replacement in Automatic Transmissions 3 Speed - MB3 or Shift Lock Control Module Replacement in Automatic Transmissions 4 Speed - MS7. Is the repair complete? | -- | Go to Automatic Transmission Shift Lock Control System Check | --