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OUTPUT CIRCUIT/ACTUATOR TESTS In the Output Circuit/Actuator Test mode, the out- put circuits can be viewed, monitored, overridden, (1) To begin the Output Circuit/Actuator Tests you must be in the Select Test mode. (2) With a “00” value displayed in the Test Selector and no stick man, turn the rotary temperature con- (3) To see the output value, depress the A/C or Recirc button. The values displayed will represent (4) To enter the actuator test, depress the A/C or Recirc button. Then, rotate the right temperature set BLOWER MOTOR WARNING: ON VEHICLES EQUIPPED WITH AIR- REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR For circuit descriptions and diagrams, refer to 8W-42 - Air Conditioning/Heater in Group 8W - Wir- • Faulty fuse • Faulty blower motor circuit wiring or wire har- ness connections • Faulty blower motor resistor (if the vehicle is so equipped) • Faulty blower motor power module (if the vehi- cle is so equipped) • Faulty blower motor switch • Faulty heater-A/C mode control switch • Faulty blower motor. in all speeds include: • Faulty fuse • Faulty blower motor switch • Faulty blower motor resistor (if the vehicle is so equipped) • Faulty blower motor controller (power module) (if the vehicle is so equipped) • Faulty AZC module (if the vehicle is so equipped) • Faulty blower motor circuit wiring or wire har- ness connections. VIBRATION Possible causes of blower motor vibration include: • Improper blower wheel mounting • Blower wheel out of balance or bent • Blower motor faulty. NOISE To verify that the blower is the source of the noise, unplug the blower motor wire harness connector and • Foreign material in the heater-A/C housing • Improper blower motor mounting • Improper blower wheel mounting • Blower motor faulty. BLOWER MOTOR RESISTOR For circuit descriptions and diagrams, refer to 8W-42 - Air Conditioning/Heater in Group 8W - Wir- WARNING: ON VEHICLES EQUIPPED WITH AIR- REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR (1) Disconnect and isolate the battery negative cable. (2) Unplug the wire harness connector from the blower motor resistor. (3) Check for continuity between each of the blower motor switch input terminals of the resistor BLOWER MOTOR SWITCH For circuit descriptions and diagrams, refer to 8W-42 - Air Conditioning/Heater in Group 8W - Wir- 24 - 22 HEATING AND AIR CONDITIONING WJ DIAGNOSIS AND TESTING (Continued) |