DTC P1288:00 [MZI-3.7]
id0102d2317100
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DTC P1288:00 |
CHT sensor out of self-test range |
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DETECTION CONDITION
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• Indicates the CHT sensor is out of self-test range. The engine is not at a normal operating temperature.
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POSSIBLE CAUSE
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• Cold engine
• Engine overheating
• Low engine coolant level
• 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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VERIFY RELATED PENDING CODE OR STORED DTC
• Verify the related PENDING CODE or stored DTCs.
• Are other DTCs present?
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Yes
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Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Go to the next step.
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4
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INSPECT THE COOLING SYSTEM
• Inspect the vehicle coolant level.
• Is the cooling system normal?
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Yes
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Go to the next step.
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No
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Inspect the cooling system (overheat), the go to Step 7.
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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 Step 7.
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No
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Go to the next step.
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6
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INSPECT FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
• Connect all the PCM connectors and verify that they seat correctly.
• Retrieve DTCs using the M-MDS.
• Is the PENDING CODE for this DTC present?
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Yes
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Go to the next step.
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No
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The system is correctly. Go to the next step.
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7
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VERIFY TROUBLESHOOTING OF DTC P1288:00 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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8
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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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