Pinpoint Test X: The Auxiliary Temperature and Panel/Floor Controls Are Inoperative Using The Front Auxiliary Climate Controls

Climate Control System

Pinpoint Tests

Pinpoint Test X: The Auxiliary Temperature and Panel/Floor Controls are Inoperative Using the Front Auxiliary Climate Controls

Refer to Wiring Diagram Set 52, Auxiliary Climate Control for schematic and connector information. Diagrams By Number

Normal Operation

Under normal operation, the front auxiliary climate control assembly receives voltage and ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Front auxiliary climate control assembly



PINPOINT TEST X: THE AUXILIARY TEMPERATURE AND PANEL/FLOOR CONTROLS ARE INOPERATIVE USING THE FRONT AUXILIARY CLIMATE CONTROLS

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X1 CHECK FOR VOLTAGE TO THE FRONT AUXILIARY CLIMATE CONTROL ASSEMBLY


- Ignition OFF.
- Disconnect: Front Auxiliary Climate Control Assembly C951B.
- Ignition ON.
- Measure the voltage between front auxiliary climate control assembly C951B-10, circuit CBP18 (GY/OG), harness side and C951B-9, circuit GD149 (BK/GY), harness side.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new front auxiliary climate control assembly. TEST the system for normal operation.

No
GO to X2.

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X2 CHECK CIRCUIT CBP18 (GY/OG) FOR AN OPEN


- Measure the voltage between ground and front auxiliary climate control assembly C951B-10, circuit CBP18 (GY/OG), harness side.




- Is the voltage greater than 10 volts?

Yes
REPAIR circuit GD149 (BK/GY) for an open. TEST the system for normal operation.

No
VERIFY Smart Junction Box (SJB) fuse 18 (10A) is OK. If OK, REPAIR circuit CBP18 (GY/OG) for an open. TEST the system for normal operation.

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