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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1361 (Automatic Transmission - 4L80-E - Service & Replacement) >> Diagnostic Information and Procedures >> DTC P1810: Invalid State Of The TFP Manual Valve Position Switch Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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. This step tests the indicated range signal to the manual valve that is actually selected.
  2. 5. This step tests the voltage from the PCM to the transmission 20-way connector.
Fig 1: DTC P1810 (Steps 1 - 6)
G01952212Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1810 (Steps 7 - 15)
G01952213Courtesy of GENERAL MOTORS CORP.
Fig 3: DTC P1810 (Steps 16 - 18)
G01952214Courtesy of GENERAL MOTORS CORP.
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