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FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting 55-44 Inspection procedure 3 A/C graphic display on control panel is blank. Probable cause The cause is probably a malfunction of the A/C-ECU power supply system D Malfunction of connector or harness D Malfunction of A/C-ECU Does the A/C operate? NO Inspection procedure 15 (Refer to P.55-52.) YES Replace the A/C-ECU. Inspection procedure 4 Temperature cannot be set. Probable cause The cause is probably a malfunction of the temperature setting signal input D Malfunction of connector or harness D Malfunction of A/C-ECU Inspection procedure 15 (Refer to P.55-52.) Inspection procedure 5 A/C outlet air temperature does not increase. Probable cause If the outlet air temperature does not increase when the temperature setting is II can be used to check the diagnosis codes in order to check the cause of the problem for each separate D Malfunction of air mix damper potentiometer D Malfunction of air mix damper motor D Malfunction of air mix damper D Malfunction of connector or harness D Malfunction of thermostat D Malfunction of A/C-ECU MUT- II Self-Diag code Is any of the codes 11, 12, 31 and 41 output? YES INSPECTION CHART FOR DIAGNOSIS CODES (Refer to NO Thermostat check NG Replace OK Replace the A/C-ECU. Inspection procedure 6 A/C outlet air temperature does not decrease. Probable cause If the outlet air temperature does not decrease when the temperature setting is II can be used to check the diagnosis codes in order to check the cause of the D Malfunction of outside air temperature sensor D Malfunction of air mix damper potentiometer D Malfunction of air mix damper motor D Malfunction of air thermo sensor D Malfunction of connector or harness D Malfunction of air mix damper D Malfunction of A/C-ECU Does the A/C operate? NO Inspection procedure 2 (Refer to P.55-43.) YES MUT- II Self-Diag code Is any of the codes 11, 12, 13, 14, 21, 22, 31 and 41 output? YES INSPECTION CHART FOR DIAGNOSIS CODES (Refer to NO Replace the A/C-ECU. |