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REAR CLIMATE CONTROL UNIT INSPECTION

BME074061325W03

## With A/C and Heater

1. Slide out the rear climate control unit with the connectors still connected. (See REAR CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)

2. Turn the ignition switch to ON position.

3. Measure the voltage at each rear climate control unit terminal and refer to terminal voltage table.

  • If there is any malfunction, inspect the parts listed under "Inspection item(s)" and the related wiring harness.

  - If the parts and wiring harness under "Inspection item(s)" are found to be normal, replace the rear climate control unit.

### Terminal voltage table (Reference)

Terminal | Signal | Connected to | Test condition | Voltage (V)/Continuity | Action
--- | --- | --- | --- | --- | ---
A | VENT, COLD signal | Rear airflow mode and air mix actuator | Airflow mode and temperature SW at VENT, COLD | 0 | • Inspect for continuity or short circuit (Rear climate control unit-Rear airflow mode and air mix actuator: A-A) • Inspect rear airflow mode and air mix actuator
Airflow mode and temperature SW at HEAT, HOT | B+
B | - | - | - | - | -
D | HEAT, HOT signal | Rear airflow mode and air mix actuator | Airflow mode and temperature SW at HEAT, HOT | B+ | • Inspect for continuity or short circuit (Rear climate control unit-Rear airflow mode and air mix actuator: D-C) • Inspect rear airflow mode and air mix actuator
Airflow mode and temperature SW at VENT, COLD | 0
F | - | - | - | - | -
G | TNS | TNS relay | Headlight SW to TNS or Headlight position | B+ | • Inspect TNS relay • Inspect related harness
Headlight SW to OFF position | 0
H | GND | GND | Under any condition: Inspect for continuity to ground | Yes | • Inspect related harness

## With A/C Only or Heater Only

1. Connect the battery positive voltage to terminal B and ground to terminal A.

2. Verify that the bulb illuminates.

  • If not as specified, replace the bulb.