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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System With Traction Control System - BOSCH 5.3 >> Diagnostic Tests >> DTC C0181: Throttle Reduction Motor Circuit Malfunction (CAMARO & Firebird) >> Diagnosis

DTC C0181: Throttle Reduction Motor Circuit Malfunction (CAMARO & Firebird): Diagnosis

  1. Perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. Go to next step.
  2. Turn ignition off. Disconnect accelerator control and adjuster connector. Disconnect all cables from accelerator control and adjuster. Rotate adjuster by hand fully, then release and allow to return to stop. Repeat this procedure three times. Zero leads on DVOM. Using DVOM, measure resistance between accelerator control and adjuster connector terminals "A" and "B". If resistance is 0.5-10 ohms, go to step  4 . If resistance is not 0.5-10 ohms, go to next step.
  3. Replace accelerator control and adjuster. See ADJUSTER ASSEMBLY (CAMARO & FIREBIRD)  under REMOVAL & INSTALLATION. After repairs, go to step  19 .
  4. Disconnect Accelerator & Servo Module (ASM) connector. Using a DVOM, measure resistance between ASM connector terminals No. 22 (White wire) and No. 28 (Black/White wire). If resistance is infinite, go to step  6 . If resistance is not infinite, go to next step.
  5. Repair short to ground in White wire between accelerator control and adjuster and ASM. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
  6. Using DVOM, measure resistance between ASM connector terminals No. 26 (Gray wire) and No. 28 (Black/White wire). If resistance is infinite, go to step  8 . If resistance is not infinite, go to next step.
  7. Repair short to ground in Gray wire between accelerator control and adjuster and ASM. After repairs, go to step  19 .
  8. Using DVOM, measure resistance between ASM harness connector terminal No. 22 (White wire) and accelerator adjuster connector terminal "A". If resistance is 0-5 ohms, go to step  10 . If resistance is not 0-5 ohms, go to next step.
  9. Repair open circuit in White wire between accelerator control and adjuster and ASM. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
  10. Using DVOM, measure resistance between ASM connector terminal No. 49 (White wire) and accelerator adjuster connector terminal "A". If resistance is 0-5 ohms, go to next step. If resistance is not 0-5 ohms, go to step  9 .
  11. Using DVOM, measure resistance between ASM connector terminal No. 26 (Gray wire) and accelerator adjuster connector terminal "B". If resistance is 0-5 ohms, go to step  13 . If resistance is not 0-5 ohms, go to next step.
  12. Repair open circuit in Gray wire between accelerator control and adjuster and ASM. After repairs, go to step  19 .
  13. Using DVOM, measure resistance between ASM connector terminal No. 53 (Gray wire) and accelerator adjuster connector terminal "B". If resistance is 0-5 ohms, go to next step. If resistance is not 0-5 ohms, go to step  12 .
  14. Turn ignition on, engine off. Using DVOM, measure voltage at ASM connector terminal No. 22 (White wire). If voltage is more than one volt, go to next step. If voltage is not more than one volt, go to step  16 .
  15. Repair short to voltage in White wire between accelerator control and adjuster and ASM. After repairs, go to step  19 .
  16. Using DVOM, measure voltage at ASM connector terminal No. 26 (Gray wire). If voltage is more than one volt, go to next step. If voltage is not more than one volt, go to step  18 .
  17. Repair short to voltage in Gray wire between accelerator control and adjuster and ASM. After repairs, go to step  19 .
  18. Replace ASM. See ACCELERATOR & SERVO CONTROL MODULE (CAMARO & FIREBIRD)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  19. Using scan tool, clear DTCs. Operate vehicle. If DTC does not reset, system is okay.
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