2002 Acura MDX DTC Troubleshooting.pdf

2002 Acura MDX DTC Troubleshooting

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DTC indicator light N: A problem in the blower motor circuit 1. Check the No. 56 (40A) fuse in the under-hood fuse/relay box, and the No. 3 (7.5A) fuse in the driver’s under-dash fuse/relay box. Are the fuses OK? YES – Go to step 2. NO – Replace the fuse(s), and recheck. 2. Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire. 3. Turn the ignition switch ON (II). Does the blower motor run? YES – Go to step 4. NO – Go to step 17. 4. Turn the ignition switch OFF. 5. Disconnect the jumper wire. 6. Disconnect the power transistor 5P connector. 7. Check for continuity between the No. 5 terminal of the power transistor 5P connector and body ground.

Is there continuity? YES – Go to step 8. NO – Check for an open in the wire between the power transistor and body ground. If the wire is OK, check for poor ground at G401. 9. Turn the ignition switch ON (II). Does the blower motor run at high speed? YES – Go to step 10. NO – Repair open in the wire between the power transistor and the blower motor. 10. Turn the ignition switch OFF. 11. Disconnect the jumper wire. 12. Disconnect climate control unit connector B (26P). 13. Check for continuity between the No. 12 and No. 14 terminals of climate control unit connector B (26P) and body ground individually. Is there continuity? YES – Repair any short to body ground in the wire(s) between the climate control unit and the power transistor. NO – Go to step 14. 14. Check for continuity between the following terminals of climate control unit connector B (26P) and power transistor 5P connector.