2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1856
5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is
greater than 103 kPa.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the ECM.
6. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding
with the Component Testing.
1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
4. Install a jumper wire at the MAP sensor signal circuit.
5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The
voltage should vary between 0-5.2 volts without any spikes or dropouts.
瀚慖f the voltage is not within the specified range or is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0108
DTC P0107 or P0108
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 P0107
- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
