For 1990-2009 cars
ABS Components
Cell 44: PWR, GND, and Stoplamp/BTSI Switch
Handling ESD Sensitive Parts Notice
Cell 10: Battery and Underhood Fuse Blocks
Cell 10: MISC LGT, COOL FNS, C/LTR/RDO/CLSTR/MISC, IGN SW, RR DEFOG/PWRSEAT, ABS SOL, and ABS MOT Fuses
Cell 10: ABS/CCR and CLG FAN/TCC Fuses

### Circuit Description

The solenoid valve relay supplies power to the solenoid valves. The solenoid valve relay activates when the ignition is ON and when no DTCs are present. Power is supplied to the valve solenoids through the solenoid valve relay via CKT 342. Power is supplied to the pump motor via CKT 642. The ignition input is supplied via CKT 641.

### Conditions for Setting the DTC

• | The ignition voltage is greater than 10.5 volts.

• | The solenoid relay is commanded ON.

• | The solenoid relay voltage is less than 8.0 volts.

### Action Taken When the DTC Sets

• | A malfunction DTC is stored.

• | The ABS/TCS is disabled.

• | The ABS indicator isturned ON.

• | The TRACTION OFF indicator is turned ON.

### 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.

• | The relays are integral to the EBTCM and are not serviceable.

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 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --