|
|
12.18 A/C System Failure
Yes Next step 1 Check if there is enough coolant, if the A/C belt, the A/C clutch and the pressure switch are in good condition. No Troubleshooting Yes Remove the failure displayed 2 Let engine run at idle speed and turn on A/C switch. Enter A/C self diagnosis mode to check the A/C system for failure. No Next step Yes Next step 3 Turn on the A/C switch and connect an adaptor between ECU and harness. Measure 75# pin (A/C switch) of ECU and see if there are input signals on it. No Check the harness
Yes Replace or repair the harness 4 If this vehicle adopts low level control, check if the air condition is working still even though it is turned off. No Next step Yes Repair the A/C replay and harness 5 Check if there is low level output at ECU pin No.69 (connect to the ground of pull in winding of A/C relay). No Replace ECU
Note: Different from the controlling means of other models, the A/C control system of A21 adopts the automatic A/C and uses double-pressure switch to control incorporation of the A/C system and the fan after A/C starts up.
|