: | Dec 17, 2007 |
Electrical |
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Make sure that all DTCs are cleared following rectification. |
Symptom | Possible cause | Action |
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Poor starting (extreme weather conditions) |
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Check the glow plug harnesses at the glow plugs and at the connection to the main harness. Refer to the electrical guides. Check for glow plug DTCs. The fuel system recycles fuel until operating temperature is reached to reduce this possibility. |
High cold-engine emissions |
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Check the glow plug harnesses at the glow plugs and at the connection to the main harness. Refer to the electrical guides. Check for glow plug DTCs. After-glow is designed to function at engine temperatures below 50 degrees C (122 degrees F), and below 2,500 rpm. |
High cold-engine noise, vibration or harshness |
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Check the glow plug harnesses at the glow plugs and at the connection to the main harness. Refer to the electrical guides. Check for glow plug DTCs. After-glow is designed to function at engine temperatures below 50 degrees C (122 degrees F), and below 2,500 rpm. |
Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system). |
For a full list of ECM DTCs, refer to workshop manual section 303-14 - Electronic Engine Controls. |
DTC | Description | Possible causes | Action |
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P038300 | Glow Plug Control Module Control Circuit Low |
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Refer to the electrical guides and check the circuit. Check the relay operation. Repair/renew as necessary. |
P038400 | Glow Plug Control Module Control Circuit High |
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Refer to the electrical guides and check the circuit. Check the relay operation. Repair/renew as necessary. |
P067000 | Glow Plug Control Module Control Circuit / Open |
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Check the glow plug relay circuits. Refer to the electrical guides. Check the relay operation. Activate the relay and listen for an audible 'click'. Repair/renew as necessary. Clear the DTCs and test for normal operation. |