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Home >> Toyota >> 2004 >> Tacoma PreRunner V6-3.4L (5VZ-FE) >> Repair and Diagnosis >> Heating and Air Conditioning >> Control Assembly >> Testing and Inspection >> On-Vehicle Inspection
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On-Vehicle Inspection

HEATER CONTROL ASSEMBLY

ON-VEHICLE INSPECTION

1. INSPECT HEATER CONTROL DIALS OPERATION
Move the control dials left and right check for stiffness and binding the full range of the dials.

2. REMOVE HEATER CONTROL ASSEMBLY

3. INSPECT AMPLIFIER CIRCUIT







a. Inspect the connector on wire harness side, as shown in the chart.

Test conditions:
- Turn ignition switch to ON
- Blower speed switch HI
- Temperature control lever Max. COOL







b. Disconnect the amplifier connector and inspect the connector on wire harness side, as shown in the chart.

Test conditions:
- Turn ignition switch to ON
- Blower speed switch HI
- Temperature control lever Max. COOL







c. Connect the connector to amplifier and inspect wire harness side connector from the back side as shown in the chart.

Test conditions:
- Running engine at idle speed
- Blower speed switch HI
- A/C switch ON
- Temperature control lever Max. COOL


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