Pinpoint Test K : The A/C (Air Conditioning) Is Inoperative: Notes
Refer to Manual Climate Control System for schematic and connector information.
Normal Operation and Fault Conditions
Control System LogicREFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description .
Diagnostic Trouble Code (DTC) Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| 5-2 | A/C Select Drive Circuit/Performance | This DTC sets when any of the following occur during a HVAC control module self-test: The module senses ground on the A/C request circuit when the circuit is not grounded by the HVAC control module, indicating a short directly to ground. The module senses voltage on the A/C request circuit when the circuit is grounded by the HVAC control module, indicating a short directly to voltage. The module senses no voltage on the A/C request circuit when the relay is not grounded by the HVAC control module, indicating an open. |
Possible Sources
- Wiring, terminals or connectors
- A/C pressure transducer
- PCM
- HVAC control module
- IPC
- Evaporator temperature sensor
Visual Inspection and Diagnostic Pre-checks
- Inspect CJB fuse 12 (7.5A).
- Inspect CJB fuse 21 (7.5A).
- Inspect BJB fuse 24 (10A).
- Inspect BJB fuse 30 (10A).
- Inspect the A/C clutch relay.