Code No. B1045: Air mixing damper control motor drive system
DIAGNOSIS CODE SET CONDITIONS
PROBABLE CAUSES
- Malfunction of air mix damper potentiometer motor and potentiometer
- Damaged harness wires and connectors
- Malfunction of the A/C-ECU
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III actuator test |
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Q.
Does the air mix damper motor work normally?
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Go to Step 5. |
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Go to Step 2. |
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STEP 2. Connector check: B-17 air mixing damper control motor and potentiometer connector, and B-16 A/C-ECU connector |
Q.
Is the check result normal?
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Go to Step 3. |
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Repair the damaged connector. |
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STEP 3. Check the wiring harness between B-17 air mixing damper control motor and potentiometer connector terminal No. 1, 2 and B-16 A/C-ECU connector terminal No. 12, 1. |
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Q.
Is the check result normal?
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Go to Step 4. |
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Repair the wiring harness. |
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STEP 4. Check the air mixing damper control motor and potentiometer. |
Refer to . |
Q.
Is the check result normal?
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Go to Step 5. |
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Replace the air mix damper motor and potentiometer. |
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STEP 5. Check whether the diagnosis code is reset. |
Q.
Is the diagnosis code set?
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Replace the A/C-ECU. |
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Intermittent malfunction. Refer to GROUP 00 - How to
Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .) |
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