DTC P0532 or P0533 |
Diagnostic Instructions |
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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. |
DTC Descriptors |
Diagnostic Fault Information |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
5V Reference |
P0532 00 |
P0532 00 |
- |
- |
Refrigerant Pressure Sensor Signal |
P0532 00 |
P0532 00 |
P0533 00 |
- |
Low Reference |
- |
P0532 00 |
- |
- |
Circuit/System Description |
Conditions for Running the DTC |
Conditions for Setting the DTC |
Action Taken When the DTC Sets |
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The A/C compressor is disabled. |
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The ECM will illuminate the malfunction indicator lamp (MIL). |
Conditions for Clearing the DTC |
Reference Information |
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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 Testing |
1. |
Ignition OFF, disconnect the harness connector at the B1 A/C Refrigerant Pressure Sensor. |
2. |
Ignition ON, test for 4.8-5.2V between the 5V reference circuit terminal 2 and ground. |
3. |
If less than the specified range, test the 5V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module. |
4. |
If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. |
5. |
Test for 4.8-5.2V between the 5V reference circuit terminal 2 and the low reference circuit terminal 1. |
6. |
If the value is less than the specified range, test the low reference circuit for an open circuit/high resistance. If the circuit tests normal, replace the K20 Engine Control Module. |
7. |
If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. |
8. |
Verify the scan tool A/C High Side Pressure Sensor parameter is less than 0.3V. |
9. |
If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. |
10. |
Install a 3A fused jumper wire between the following signal circuit terminal 3 and the 5V reference circuit terminal 2. Verify the scan tool A/C high side pressure sensor parameter is greater than 4.8V. |
11. |
If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module. |
12. |
If all circuits test normal, replace the B1 A/C Refrigerant Pressure Sensor. |
Repair Instructions |
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Control Module References
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