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Troubleshooting

1. Faulty heater control amplifier R H View from wire side e B G 3 Abnormal air flow Coupe Push button which does not work Perform 1 2 of No 2 troubleshooting Perform 3 4 of No 2 troubleshooting Troubleshooting 4 All LED s are not lit Coupe Remove heater controller Remove mode control switch Make sure other wire harness are connected Check for continuity between d terminal of 10P connector and body ground Is there continuity YES Turn ignition switch on Measure voltage between c positive and d nega tive terminals of 10P connector Is 12 volts available YES Faulty mode control switch NOTE Connect the ohmmeter SS positive prove to the body ground z LY S amplifer Poor ground DOOD O UL Faulty heater control in View from wire side Faulty heater control amplifier 5 One LED does not light when a mode control switch is pushed However air flow is normal Coupe Faulty Mode control switch 6 Brightness of LED is not reduced when lighting switch is turned on Coupe Turn lighting switch on Check mode control switch illumination YES Faulty heater control amplifier Turn lighting switch off Remove heater conroller See page 23 7 23 6 From page 23 6 Check bulb Replace and recheck Faulty mode control switch 7 Recirculation doo
2. Troubleshooting 1 Insufficient heating Duct clogged or disconnected Broken air outlet Clogged heater valve Heater valve control cable misadjusted or disconnected Air mix control cable misadjusted or disconnected Faulty cooling system thermostat Clogged heater core Clogged heater hose 2 Air flow doesn t change when buttons are pushed Coupe Check No 14 fuse 20A Is it normal NO Repalce and recheck YES 4 Touch mode control motor for 1 2 minutes NO YES 9 E Y Bl G Bl Turn ignition switch off Remove heater controller Check for continuity be tween G terminal B of 17P connector and body ground wire side Is there continuity ne Poor ground f l Turn ignition switch on Measure voltage between E Y BI positive and G BI negative terminals of 17P connector See page 23 5 23 4 From page 234 is 12 volts available NO Open circuit between No 14 YES fuse and heater control 3 Turn ignition switch off amplifier View from Remove mode control wire side switch Check mode control switch Does switch work NO properly Faulty mode control i switch YES Remove mode control motor Check mode control View from motor wireside B N Does motor work NO F D 0 S properly aulty mode control motor CR lt YES X Z 4 Check leads for conti nuity between heater control amplifier and mode control motor a NO Sa YES
3. r malfunction Coupe Turn ignition switch on Touch recirculation con trol motor and wait for 1 2 minutes NO Does motor remains HOT cool Bound linkage YES Turn ignition switch off Remove heater controller Check mode control switch Does switch work properly NO Faulty mode contro switch YES Check for continuity be tween f and Y terminals of heater control amplifier Is there continuity N Faulty heater control YES amplifier Check for continuity be tween g and W terminals of heater control amplifier Is there continuity Faulty heater control i NO YES amplifier See page 23 8 wire side 23 7 Troubleshooting From page 23 7 Remove recirculation control motor Check recirculation control motor Does motor work properly Check leads for continuity between recirculation control motor and heater control amplifier Is there continuity Faulty heater control amplifer 23 8 NOTE On cars with an air condi tioner remove the heater controller and check operation of the recircu lation motor by applying 12 volts and checking for continuity be tween terminals of 17P connector of the wire harness If the motor does not operate the motor or wire harness may be faulty Faulty recirculation control motor View from wire side Y Bu G W Bu Or

Troubleshooting

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