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Diagnostic System Check

  1. Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  2. Turn ignition on, engine off. Try to establish scan tool communication with Electronic Brake Control Module (EBCM), Engine Control Module (ECM) and Transmission Control Module (TCM). If communication with modules is established, go to next step. If communication with modules is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  3. Select display DTC function for each module. Record all displayed DTCs, status of displayed DTCs and module that set DTC. If DTCs are displayed, go to next step. If no DTCs are displayed, see SYMPTOM DIAGNOSIS  .
  4. Retrieve codes and perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

Code Definition
BXXXX (1)
C0035  Left Front Wheel Speed Circuit Malfunction
C0040  Right Front Wheel Speed Circuit Malfunction
C0045  Left Rear Wheel Speed Circuit Malfunction
C0050  Right Rear Wheel Speed Circuit Malfunction
C0060  Left Front ABS Solenoid No. 1 Circuit Malfunction
C0065  Left Front ABS Solenoid No. 2 Circuit Malfunction
C0070  Right Front ABS Solenoid No. 1 Circuit Malfunction
C0075  Right Front ABS Solenoid No. 2 Circuit Malfunction
C0080  Left Rear ABS Solenoid No. 1 Circuit Malfunction
C0085  Left Rear ABS Solenoid No. 2 Circuit Malfunction
C0090  Right Rear ABS Solenoid No. 1 Circuit Malfunction
C0095  Right Rear ABS Solenoid No. 2 Circuit Malfunction
C0110  Pump Motor Circuit Malfunction
C0121  Valve Relay Circuit Malfunction
C0141  Left TCS Solenoid No. 1 Circuit Malfunction
C0146  Left TCS Solenoid No. 2 Circuit Malfunction
C0151  Right TCS Solenoid No. 1 Circuit Malfunction
C0156  Right TCS Solenoid No. 2 Circuit Malfunction
C0161  ABS/TCS Brake Switch Circuit Malfunction
C0245  Wheel Speed Sensor Frequency Error
C0550  ECU Malfunction
C0800  Device Power No. 1 Circuit Malfunction
PXXXX (2)
UXXXX (3)
(1) See DIAGNOSTIC TESTS under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
(2) For any DTC beginning with the letter "P", see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
(3) For any DTC beginning with the letter "U", see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
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