PRE-RELEASE
031
Symptom: Parking heater fails to start.
| 031 |
Combustion air fan. Open circuit/Short circuit to B+.
Fault symptom
Parking heater fails to start.Condition
Parking heater activated.Diagnostic help
Parking heater can be activated with Tech 2.Parking heater function can be programmed in SID.
Eberspächer diagnostics instrument used for diagnosis.
Diagnostic procedure
1. Check combustion air fan motor
| • |
Remove the parking heater.
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Remove the parking heater control module.
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Unplug connector B2.
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Check the fan motor leads.
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Are the leads OK?
| YES |
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Check connectors for corrosion.
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Go to point 2.
| NO |
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Change the fan motor.
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Go to point 2.
2. Final check
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Delete DTCs in all systems.
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Contact: SID.
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Activate parking heater (ON).
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Perform a functionality check.
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Evaluate the functionality check.
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Check that the diagnostic trouble code has not recurred.
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Test results OK?
| YES |
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Fault rectified successfully.
| NO |
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See ’Procedure for replacement of control module’.
