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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 812 (Automatic Transmission - 4L60-E/4L65-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P1860: Open, Short To Ground Or Short To Power In The TCC PWM Solenoid Valve Circuit >> Test Description

Test Description

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

  1. 4. This step tests for voltage to the solenoid.
  2. 5. This step tests the ability of the PCM and wiring to control the ground circuit.
  3. 7. This step tests the resistance of the TCC PWM solenoid valve and the automatic transmission wiring harness assembly.
    Fig 1: Diagnostic Trouble Code (DTC P1860) Table (Step 1-6)
    G02111623Courtesy of GENERAL MOTORS CORP.
    Fig 2: Diagnostic Trouble Code (DTC P1860) Table (Step 7-14)
    G02111624Courtesy of GENERAL MOTORS CORP.
    Fig 3: Diagnostic Trouble Code (DTC P1860) Table (Step 15-21)
    G02111625Courtesy of GENERAL MOTORS CORP.
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