PRE-RELEASE
DTC 15
| DTC 15 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptor |
DTC 15
Operation Lock - Heater Overheated More than 10 Times
| Circuit/System Description |
The parking heater controller monitors the coolant temperature to ensure that the temperature stays within the proper range. If the overtemperature sensor detects temperature greater than 125°C (257°F), it will turn off the controller.
| Conditions for Running the DTC |
The vehicle must not be ON. Battery voltage must be between 10-15 V.
| Conditions for Setting the DTC |
The parking heater controller detects that the heater has overheated more than 10 times.
| Action Taken When the DTC Sets |
The parking heater will lock.
| Conditions for Clearing the DTC |
DTC must be cleared with the remote control.
| Diagnostic Aids |
Check for proper operation of the heater coolant pump and water flow through the engine cooling system.
| Reference Information |
Schematic Reference
HVAC Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Fuel Operated Heater Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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| Circuit/System Verification |
Ignition OFF, command the parking heater ON and OFF with the remote control. Verify the parking heater turns ON and OFF with no DTCs.
| Circuit/System Testing |
| 1. |
Ignition OFF, clear all DTCs.
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| 2. |
Ensure that the DTC does not reset.
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| 3. |
If the DTC does reset, replace the K87 Parking Heater Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
