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*BLOWER MOTOR INOPERATIVE (EXCEPT SRT10) (CONTINUED) For the Manual Temperature Control circuit diagrams (Refer to 24 - HEATING & AIR CONDITIONING - SCHEMAT- For a complete wiring diagram Refer to Section 8W. Possible Causes (C7) BLOWER MOTOR FEED CIRCUIT SHORTED TO GROUND (A970) FUSED B(+) CIRCUIT SHORTED TO GROUND (C70) BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN (Z134) GROUND CIRCUIT OPEN (C7) BLOWER MOTOR FEED CIRCUIT OPEN (A970) FUSED B(+) CIRCUIT OPEN IPM FUSE #4 OPEN BLOWER MOTOR IGNITION SWITCH A/C HEATER CONTROL Diagnostic Test 1. CHECK THE FUSE Turn the ignition off. Remove and inspect IPM Fuse #4. Is the fuse open? Yes >> Replace IPM Fuse #4 and Go To 2. No >> Reinstall IPM Fuse #4 and Go To 5. 2. CHECK BLOWER MOTOR OPERATION Turn the ignition on. Turn the blower on and operate it in all speeds and modes. Does the blower motor operate properly without blowing the fuse? Yes >> Check the (C7) Blower Motor Feed circuit and the (A970) Fused B(+) circuit for an intermittent short to ground. Repair as necessary. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL No >> Go To 3 24 - 164 HVAC - ELECTRICAL DIAGNOSTICS DR/DH |