DTC 09 [WLT-2]
id010297235700
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DTC 09 |
ENGINE COOLANT TEMPERATURE (ECT) |
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DETECTION CONDITION
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• Input value to PCM is excessively high or low for more than 2.0 S.
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POSSIBLE CAUSE
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• ECT sensor malfunction
• Open or short circuit in wiring from ECT sensor terminal A to PCM terminal E
• Open or short circuit in wiring from ECT sensor terminal B to PCM terminal B
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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Does ECT sensor or PCM connector have poor connection?
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Yes
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Repair or replace connector, then go to Step 6.
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No
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Go to the next step.
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2
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Disconnect ECT sensor connector.
Turn engine switch on.
Is there 5 V at connector terminal A?
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Yes
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Go to the next step.
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No
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Inspection for open or short circuit in wiring harness.
(PCM terminal B and ECT sensor terminal B)
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3
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Is there continuity between connector terminal A and PCM terminal E?
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Yes
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Go to the next step.
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No
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Repair or replace wiring harness, then go to Step 6.
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4
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Is ECT sensor normal?
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Yes
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Go to the next step.
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No
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Replace the ECT sensor, then go to Step 6.
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5
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Clear DTC from memory.
Is same code No. present after performing “After Repair Procedure”?
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Yes
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Go to Step 1.
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No
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Intermittent poor connection in harnesses or connector.
Repair connectors and/or harnesses, then go to the next step.
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6
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Is there any No. present after performing “After Repair Procedure”?
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Yes
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Go to applicable DTC inspection.
(See DTC TABLE [WLT-2].)
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No
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Troubleshooting completed.
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