PRE-RELEASE
DTC 64 or 65
| DTC 64 or 65 |
| Diagnostic Instructions |
| • |
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 Descriptors |
DTC 64
Parking Heater Combustion Sensor Circuit Open
DTC 65
Parking Heater Combustion Sensor Circuit Low or Circuit High
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|
Parking Heater Combustion Sensor Signal
|
65
|
64
|
65
|
-
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Parking Heater Combustion Sensor Low Reference
|
-
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64
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65
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-
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| Circuit/System Description |
The fuel operated heater uses a combustion sensor to monitor combustion temperature.
| Conditions for Running the DTC |
Ignition OFF. Battery voltage must be between 10-15 V.
| Conditions for Setting the DTC |
Fuel operated heater has recognized out of range condition for more than 2.5 s.
| Action Taken When the DTC Sets |
The fuel operated heater will lock.
| Conditions for Clearing the DTC |
DTC must be cleared with the remote control.
| 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, parking heater OFF, separate the K87 Parking Heater Control Module from the X150 Parking Heater Harness & Parking Heater Assembly Harness.
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| 2. |
Test the B167 Parking Heater Combustion Sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the
Fuel Operated Heater Sensor Resistance Table
and verify that the resistance is within 5% of the specification.
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| 3. |
If not within the specified range, replace the B167 Parking Heater Combustion Sensor.
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| 4. |
If the B167 Parking Heater Combustion Sensor tests normal, replace the K87 Parking Heater Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
