2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2891

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2891

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the A/C refrigerant pressure sensor.

2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 2 and ground.

瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance.

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage.

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 flow control module (FPCM) 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