| DTC indicator 6: | A Problem in the Blower Motor Circuit |
| 1. | Clear the DTC. |
| 2. | Turn the ignition switch OFF, and then ON (II). |
| 3. | Do the self-diagnostic with the HVAC control unit . |
| 4. | Check for DTCs. Is DTC 6 indicated? YES - Go to 5. NO - Intermittent failure, check for loose wires or poor connections on the blower motor circuit.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Check the No. 9 (40 A) fuse in the under-hood fuse/relay box, and the No. 36 (10 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to 7. NO - Replace the fuses, and recheck.n |
| 7. | Connect the blower motor 2P connector terminal No. 2 to body ground with a jumper wire.
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| 8. | Turn the ignition switch ON (II). Does the blower motor run? YES - Go to 9. NO - Go to 24. |
| 9. | Turn the ignition switch OFF. |
| 10. | Disconnect the jumper wire. |
| 11. | Disconnect the power transistor 4P connector. |
| 12. | Check for continuity between the power transistor 4P connector terminal No. 2 and body ground.
Is there continuity? YES - Go to 13. 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.n |
| 13. | Connect the power transistor 4P connector terminals No. 2 and No. 4 with a jumper wire.
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| 14. | Turn the ignition switch ON (II). Does the blower motor run at high speed? YES - Go to 15. NO - Repair open in the GRN wire between the power transistor and the blower motor.n |
| 15. | Turn the ignition switch OFF. |
| 16. | Disconnect the jumper wire. |
| 17. | Disconnect the HVAC control unit 24P connector. |
| 18. | Check for continuity between body ground and the HVAC control unit 24P connector terminals No. 7 and No. 8 individually.
Is there continuity? YES - Repair any short to body ground in the wires between the HVAC control unit and the power transistor.n NO - Go to 19. |
| 19. | Check for continuity between the following terminals of the HVAC control unit 24P connector and the power transistor 4P connector.
Is there continuity? YES - Go to 20. NO - Repair any open in the wires between the HVAC control unit and the power transistor.n |
| 20. | Turn the ignition switch ON (II). |
| 21. | Measure the voltage between body ground and the HVAC control unit 24P connector terminals No. 7 and No. 8 individually.
Is there voltage? YES - Repair short to power in the wires.n NO - Go to 22. |
| 22. | Reconnect the HVAC control unit 24P connector. |
| 23. | Test the power transistor. Is the power transistor OK? YES - Check for loose wires or poor connections at the HVAC control unit 24P connector and at the power transistor 4P connector. If the connections are good, substitute a known-good HVAC control unit, and recheck. If the symptom/indication goes away, replace the original HVAC control unit.n NO - Replace the power transistor.n |
| 24. | Disconnect the jumper wire. |
| 25. | Disconnect the blower motor 2P connector. |
| 26. | Measure the voltage between the blower motor 2P connector terminal No. 1 and body ground.
Is there battery voltage? YES - Replace the blower motor.n NO - Go to 27. |
| 27. | Turn the ignition switch OFF. |
| 28. | Remove the blower motor relay from the under-hood fuse/relay box, and test it. Is the relay OK? YES - Go to 29. NO - Replace the blower motor relay.n |
| 29. | Measure the voltage between the blower motor relay 4P socket terminal No. 1 and body ground.
Is there battery voltage? YES - Go to 30. NO - Replace the under-hood fuse/relay box.n |
| 30. | Turn the ignition switch ON (II). |
| 31. | Measure the voltage between the blower motor relay 4P socket terminal No. 3 and body ground.
Is there battery voltage? YES - Go to 32. NO - Repair open in the wire between the No. 36 fuse in the under-dash fuse/relay box and the blower motor relay.n |
| 32. | Turn the ignition switch OFF. |
| 33. | Check for continuity between the blower motor relay 4P socket terminal No. 4 and body ground.
Is there continuity? YES - Repair open in the WHT wire between the blower motor relay and the blower motor.n NO - Check for an open in the wire between the blower motor relay and body ground. If the wire is OK, check for poor ground at G301.n |