LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 822 (HVAC Systems - Automatic) >> Diagnostic Information and Procedures >> DTC B0434 or B3764: Door Actuator Position Value Low >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. 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. 2. Ensure to observe the correct parameter for each DTC. Aux. Temp Dr. Position is for the auxiliary air temperature actuator. Mode Door Actual is for the auxiliary mode actuator.
  2. 4. Tests for the proper operation of the circuit in the low voltage range.
  3. 5. Tests for the proper operation of the circuit in the high voltage range. If the jumper fuse opens when you perform this test, the circuit is shorted to ground.
  4. 6. Tests for a short to voltage in the 5-volt reference circuit.
  5. 7. Tests for a high resistance or for an open in the low reference circuit.
  6. 13. The voltage will vary between 0-5 volts during normal operation. Ensure to observe the actuator driveshaft and the volt meter when jumping the control circuit with 5-volt reference and the ground circuits. The actuator and the auxiliary HVAC control module connectors must be connected during this step.
    Fig 1: DTC B0434 Or B3764 Diagnosis Procedure (Step 1 To 7)
    G01454755Courtesy of GENERAL MOTORS CORP.
    Fig 2: DTC B0434 Or B3764 Diagnosis Procedure (Step 8 To 15)
    G01454756Courtesy of GENERAL MOTORS CORP.
    Fig 3: DTC B0434 Or B3764 Diagnosis Procedure (Step 16 To 21)
    G01454757Courtesy of GENERAL MOTORS CORP.

scientia non olet · About LEMON Manuals