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DTC 30-32

DTC 30-32

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


DTC Descriptors

DTC 30

Parking Heater Blower Motor Speed Out of Tolerance

DTC 31

Parking Heater Blower Motor Circuit Open

DTC 32

Parking Heater Blower Motor Circuit Low or Circuit High

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Parking Heater Blower Motor Supply Voltage

32

31

32

30

Parking Heater Blower Motor Ground

-

31

32

30



Circuit/System Description

The parking heater uses a parking heater blower motor to supply oxygen onto the combustion chamber so the air fuel mixture will ignite when the glow plug is activated.

Conditions for Running the DTC

Ignition OFF. Battery voltage must be between 10-15 V.

Conditions for Setting the DTC

parking heater has recognized out of range condition for more than 2.5 s.

Action Taken When the DTC Sets

The parking 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


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


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.

Component Testing


Dynamic Test

1. Ignition OFF, separate the K87 Parking Heater Control Module from the X150 Parking Heater Harness & Parking Heater Assembly Harness.

2. Ignition OFF, test for less than 5 Ω between the low reference circuit terminal and ground.

3. If greater than the specified range, replace the X150 Parking Heater Harness & Parking Heater Assembly Harness.

4. Connect a 8.2 V maximum regulated voltage supply between the 14 pin connector terminal 14 to the heater assembly and the heater control module terminal 13 to the heater assembly.

5. If the blower motor fan speed is less than 1 000 RPM, replace the M94 Parking Heater Blower Motor.

6. If the M94 Parking Heater Blower Motor tests normal, replace the K87 Parking Heater Control Module.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.