Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Pontiac Aztek AWDFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Antilock Brake System
- Diagnostic System Check - ABS
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Test Drive
- Enhanced Diagnostics
- DTC B2747: Traction Control Switch Circuit Low
- DTC C0035: LF Wheel Speed Circuit Malfunction; C0040: RF Wheel Speed Circuit Malfunction; C0041: RF Wheel Speed Sensor Circuit Range/Performance (EBCM); C0045: LR Wheel Speed Circuit Malfunction; C0046: LR Wheel Speed Sensor Circuit Range/Performance (EBCM); C0050: RR Wheel Speed Circuit Malfunction; C0051: LF Wheel Speed Sensor Circuit Range/Performance (EBCM)
- DTC C0060: LF ABS Solenoid #1 Circuit Malfunction; C0065: LF ABS Solenoid #2 Circuit Malfunction; C0070: RF ABS Solenoid #1 Circuit Malfunction; C0075: RF ABS Solenoid #2 Circuit Malfunction; C0080: LR ABS Solenoid #1 Circuit Malfunction; C0085: LR ABS Solenoid #2 Circuit Malfunction; C0090: RR ABS Solenoid #1 Circuit Malfunction; C0095: RR ABS Solenoid #2 Circuit Malfunction
- DTC C0110: Pump Motor Circuit Malfunction
- DTC C0121: Valve Relay Circuit Malfunction
- DTC C0141: Left TCS Solenoid #1 Circuit Malfunction; C0146: Left TCS Solenoid #2 Circuit Malfunction; C0151: Right TCS Solenoid #1 Circuit Malfunction; C0156: Right TCS Solenoid #2 Circuit Malfunction
- DTC C0161: ABS/TCS Brake Switch Circuit Malfunction
- DTC C0235: Rear Wheel Speed Signal Circuit Open; C0236: Rear Wheel Speed Signal Circuit Missing; C0237: Rear Wheel Speed Signal Erratic; P1504: Vehicle Speed Output Circuit
- DTC C0240: PCM Traction Control Not Allowed (ETS)
- DTC C0241: EBCM Control Valve Circuit; P1571: TCS PWM Circuit No Frequency
- DTC C0244: PWM Delivered Torque Malfunction; P1689: Traction Control Delivered Torque Control Circuit
- DTC C0245: Wheel Speed Sensor Frequency Error
- DTC C0550: ECU Malfunction - Internal Write/Checksum Malfunction
- DTC C0565: EBCM Detects Digits 5 Of VIN Is Incorrect
- DTC C0896: Electronic Suspension Control (ESC) Voltage Is Outside Normal Range Of 9-15.5 Volts
- Symptoms - Antilock Brake System
- ABS Indicator Always On
- ABS Indicator Inoperative
- Low Traction Indicator Always On
- Low Traction Indicator Inoperative
- Traction Off Indicator Always On
- Traction Off Indicator Inoperative
- Repair Instructions
- ABS Automated Bleed Procedure
- Electronic Brake Control Module (EBCM) Replacement
- Brake Pressure Modulator Valve (BPMV) Replacement
- Wheel Speed Sensor Replacement - Front
- Wheel Speed Sensor Replacement - Rear (Rear)
- Wheel Speed Sensor Replacement - Rear (Rear (w/AWD))
- Wheel Speed Sensor Jumper Harness Replacement
- Wheel Speed Sensor Jumper Harness Replacement - Front
- Wheel Speed Sensor Jumper Harness Replacement - Rear
- Traction Control Switch Replacement
- Description and Operation
- Special Tools and Equipment
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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