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AUTO A/C DIAGNOSIS HEATER, AIR CONDITIONING AND VENTILATION 55-100 STEP 17. Replace the power transistor. Q: Does the blower motor operate normally? YES : No action is necessary and testing is complete. works normally. INSPECTION PROCEDURE 6: Front Blower Air Amount cannot be Changed. . CIRCUIT OPERATION If the blower motor speed cannot be changed, the . TROUBLESHOOTING HINTS • Malfunction of the power transistor • Malfunction of the front A/C-ECU • Damaged harness wires or connectors • Refer to component locations GROUP- • Refer to configuration diagrams GROUP- • Refer to circuit diagrams GROUP- DIAGNOSIS Required Special Tool: • MB991223: Test Harness Set STEP 1. Check blower power transistor connector C-104 YES : Go to Step 2. 00E, Harness Connector Inspection .The blower motor should operate normally. 25DB119A CONNECTORS: C-15, C-104, C-115 C-104 C-115 C-15 (B) 25DB116A HARNESS SIDE CONNECTOR: C-104 |