For 1990-2009 cars
ABS Components
Cell 44: PWR, GND, and Stoplamp/BTSI Switch
Handling ESD Sensitive Parts Notice
Cell 10: MISC LGT, COOL FNS, C/LTR/RDO/CLSTR/MISC, IGN SW, RR DEFOG/PWRSEAT, ABS SOL, and ABS MOT Fuses
Cell 10: BRK/HZRD LPS, FOG LPS, CTSY LP/PWR MIR, and PARKLPS/INT LPS Fuses

### Circuit Description

This DTC occurs when the internal self-checking safety logic has determined that the stoplamp/BTSI switch is continuously on. The TCS cannot be activated when the stoplamp/BTSI switch is on.

### Conditions for Setting the DTC

The DTC sets if the following occur:

• | The vehicle speed is greater than 40 km/h (25 mph).

• | The brake was never off during 2 consecutive drive cycles.

### Action Taken When the DTC Sets

• | A malfunction DTC is stored.

• | The TCS is disabled.

• | The TRACTION OFF indicator is turned ON.

• | The ABS remains functional.

### Conditions for Clearing the DTC

• | The condition for the DTC is no longer present and you used the scan tool Clear DTC function.

• | The EBCM/EBTCM does not detect the DTC in 50 drive cycles.

### 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.

• | An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.

• | If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

• | This condition may be cause by the following:

- | A short to voltage in the stoplamp/BTSI switch circuit.

- | A misadjusted or shorted stoplamp/BTSI switch.

- | A pedal that is binding.

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. This step inspects for a short to voltage.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 | Observe the rear brake lamps. Are the rear brake lamps off? | -- | Go to Step 4 | Go to Step 3
3 | Disconnect the stoplamp/BTSI switch connector. Are the brake lamps on? | -- | Go to Step 6 | Go to Step 7
4 |

1. Disconnect the EBCM/EBTCM harness connector.
2. Install the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBCM/EBTCM harness connector only.
3. Use the J 39200 DMM in order to measure the voltage between the J 39700 terminal 3 and ground.

Is the voltage more than the specified value?

1 V

Go to Step 6

Go to Step 5

5 |

1. Turn OFF the ignition.
2. Inspect CKT 17 and the EBCM/EBTCM harness connector for damage which may result in a short to voltage with all connectors connected.
3. Reconnect all connectors.
4. Drive the vehicle for 3 drive cycles. A drive cycle consists of the following procedures:

• | Start the engine.

• | Drive above 40 km/h (25 mph) and back to 0 km/h (0 mph).

• | Turn OFF the ignition.

Was DTC C1294 set in the last three drive cycles?

--

Go to Step 8

Go to Diagnostic System Check - ABS

6 | Repair the short to voltage in CKT 17 (WHT) or CKT 20 (LT BLU). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
7 | Adjust or replace the stoplamp/BTSI switch as needed. Refer to Stop Lamp Switch Adjustment or Stop Lamp Switch Replacement in Hydraulic Brakes. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
8 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --