2010 Cadillac Truck SRX FWD V6-3.0L Page 1550
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the Q46 Air Conditioning Compressor Valve.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
FRT HVAC Fuse circuit open, test or replace the Q46 Air Conditioning Compressor Valve.
3. Verify that a test lamp does not illuminate between the B+ circuit terminal 2 and the control circuit terminal 1.
瀚慖f the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K33 HVAC Control
Module.
4. Remove the test lamp.
5. Command the A/C compressor ON with a scan tool. Verify the scan tool A/C Compressor Refrigerant Solenoid Valve Command parameter
is 100%.
瀚慖f not the specified value, test the control circuit for a short to voltage. If the circuit tests normal, replace the K33 HVAC Control Module.
6. If all circuits test normal, test or replace the Q46 Air Conditioning Compressor Valve.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the Q46 Air Conditioning Compressor Valve.
2. Test for 7-15 ohm between B+ circuit terminal 2 and control circuit terminal 1.
瀚慖f not within the specified range, replace the Q46 Air Conditioning Compressor Valve.
3. Test for infinite resistance between each terminal and the Q46 Air Conditioning Compressor Valve housing/case.
瀚慖f not the specified value, replace the Q46 Air Conditioning Compressor Valve.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and
programming
P0532
DTC P0532 or P0533
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0532 00
- Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage
DTC P0533 00
- Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage
Circuit/System Description
