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p A Note Check circuit continuity between LO relay p 5 and body ground. OK CHECK LO RELAY AFTER DISCON- E NG Replace LO relay. Diagnostic Procedure 3: Models with relay SYMPTOM: Blower motor fan speed does not change when fan speed is in AUTO. (Fan speed is fixed in C/R *1 Note CHECK AUTO AMP. AND PTC. OK E NG CHECK PTC CIRCUIT p 21 and auto amp. har- ness terminal No. p 4 . OK CHECK SENSOR CIRCUIT. Note Check circuit continuity p 25 and auto amp. har- ness terminal No. p 5 . OK Reconnect control panel harness con- F OK CHECK A/C CONTROL NG Replace A/C Control p A (Go to next page.) Note: How to repair Ambient sensor circuit Go to Diagnostic Procedure 11. In-vehicle sensor circuit Go to Diagnostic Procedure 12. YHA384 YHA262 Control panel Auto amp. YHA263 Auto amp. Control panel H H H H H H H TROUBLE DIAGNOSES AUTO Diagnostic Procedure 2: Models with relay HA-57 |