DTC P1290:00 [MZI-3.7]
id0102d2317300
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DTC P1290:00 |
CHT sensor circuit low input |
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DETECTION CONDITION
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• Indicates a CHT sensor circuit short to ground.
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POSSIBLE CAUSE
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• Short to ground in wiring harness between CHT sensor terminal A and PCM terminal 2AV
• CHT sensor malfunction
• Connector or terminal malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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INSPECT TERMINAL BENT
• Turn the ignition switch off.
• Disconnect the CHT sensor connector.
• Inspect for bent of CHT sensor terminals A and B (part-side).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 6.
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No
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Go to the next step.
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4
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INSPECT CHT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
• CHT sensor connector is disconnected.
• Turn the ignition switch off.
• Inspect for continuity between CHT sensor terminal A (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace suspected part, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT CHT SENSOR
• Inspect the CHT sensor.
• Is there any malfunction?
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Yes
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Replace the CHT sensor, then go to the next step.
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No
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Go to the next step.
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6
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VERIFY TROUBLESHOOTING OF DTC P1290:00 HAS BEEN COMPLETED
• Verify that all disconnected connectors reconnected.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOEO or KOER self-test.
• Is the PENDING CODE for the DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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7
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Troubleshooting completed.
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