2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2522
4. Verify the scan tool Low Pressure Switch parameter is Open.
瀚慖f not the specified value, test the signal circuit terminal 3 for a short to voltage.
5. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5-volt reference circuit terminal 2. Verify the scan tool Low
Pressure Switch parameter is Open.
瀚慖f not the specified value, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
HVAC control module.
6. If all circuits test normal, test or replace the A/C refrigerant pressure sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (Non-HP2) (See: Heating and Air Conditioning/Refrigerant Pressure
Sensor / Switch/Service and Repair/Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement)Air Conditioning (A/C) Refrigerant
Pressure Sensor Replacement (HP2) (See: Heating and Air Conditioning/Refrigerant Pressure Sensor / Switch/Service and Repair/Air
Conditioning (A/C) Refrigerant Pressure Sensor Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HVAC control module replacement, setup,
and programming
Powertrain Management
DTC P2534
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 Descriptor
DTC P2534
- Ignition 1 Switch Circuit Low Voltage
Diagnostic Fault Information
Circuit/System Description
The fuel pump control module monitors the ignition voltage circuit in order to determine if the voltage is within the normal operating range.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
The FPCM detects that the IGN voltage is less than 6.0 V.
Action Taken When the DTC Sets
DTC P2534 is a Type A DTC.
Conditions for Clearing the DTC
DTC P2534 is a Type A DTC.
