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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 584 (Anti-Lock Brake System) >> Diagnostic Information And Procedures >> DTC C1276: Delivered Torque Signal Circuit Malfunction; P1644: Delivered Torque Output Circuit; P1689: Traction Control Delivered Torque Control Circuit (W/NW9) >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 3.  Use the scan tool in order to determine if the delivered torque signal has a valid duty cycle.
  2. 9.  This vehicle is equipped with a PCM which uses an Electrically Erasable Programmable Read Only Memory (EEPROM). When replacing the PCM, the replacement PCM must be programmed.
Fig 1: DTC C1276, P1644, or P1689 (w/NW9) (1 Of 2)
G01582445Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC C1276, P1644, or P1689 (w/NW9) (2 Of 2)
G01582446Courtesy of GENERAL MOTORS CORP.
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