Circuit Description
This DTC is used to identify open Stoplamp Switch circuitry that prevents the Stoplamp Switch input to the EBTCM from changing states when the brake is applied.
This DTC is used in conjunction with DTC C1291 to determine the cause of an open Stoplamp Switch malfunction.
Conditions for Setting the DTC
DTC C1295 can be set after initialization is completed. If the Stoplamp Switch input voltage is out of specification for one second indicating an open circuit, a malfunction exists.
Action Taken When the DTC Sets
ABS remains enabled, TCS/ Active Handling™ (if equipped with RPO JL4) are disabled.
| • | Indicators that turn on: |
| Car Icon (TCS indicator |
| • | Messages displayed on the DIC: |
| Service Traction System |
| Service Active HNDLG (if equipped with RPO JL4) |
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC function is used. |
| • | Fifty ignition cycles have passed with no DTCs detected. |
Diagnostic Aids
| • | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
| • | If an intermittent malfunction exists refer to Testing for Electrical Intermittents in Wiring Systems. |
| • | Possible causes: |
| - | Stoplamp switch input circuit open. |
| - | All brake lamps open. |
| - | Stoplamp switch open or misadjusted. |
| - | Open brake lamp ground. |
| - | Circuit has a wiring problem, terminal corrosion, or poor connections. |
Test Description
The numbers below refer to step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 | Press the brake pedal. Do the brake lights come on? | -- | ||
Is the voltage within the range specified in the value(s) column? | Battery voltage | |||
4 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | -- | |
5 | Repair open in CKT 20. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
6 | Check the STOP/HAZ fuse in the Instrument Panel Electrical Center. Is the fuse OK? | -- | ||
7 |
Is the voltage within the range specified in the value(s) column? | Battery voltage | ||
8 | Repair CKT 140 for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
Connect a fused jumper wire between terminals A and B of the Stoplamp switch harness connector. Do the brake lamps come on? | -- | |||
10 | Adjust or repair the Stoplamp switch as necessary. Refer to Stop Lamp Switch Adjustment in Hydraulic Brakes. Is the repair complete? | -- | -- | |
11 |
Is the fuse OK? | -- | ||
12 | Repair short to ground in CKT 140. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
13 |
Is the fuse OK? | -- | ||
14 |
Is the fuse OK? | -- | ||
15 | Repair CKT 20 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- |
