LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls/Fuel - Hybrid (LZ1) - DTC P0010 To DTC P0341) >> Diagnostic Information and Procedures >> DTC P0107 or P0108 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
NOTE:

You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.

Skewed Sensor Test

  1. Ignition OFF, remove the B74 Manifold Absolute Pressure sensor from the engine. Connect the harness to the sensor, if disconnected.
  2. Ignition ON, apply -17 kPa (5.0 inHg) of vacuum to the B74 Manifold Absolute Pressure sensor, with the GE-23738-A  Vacuum Pump . Verify the scan tool MAP pressure parameter decreases between 13-21 kPa (1.8-3.0 psi).
    • If the parameter does not decrease between 13-21 kPa (1.8-3.0 psi). 

      Replace the B74 Manifold Absolute Pressure sensor.

    • If the parameter does decrease between 13-21 kPa (1.8-3.0 psi). 
  3. Apply -34 kPa (10.0 inHg) of vacuum to the B74 Manifold Absolute Pressure sensor, with the GE-23738-A  Vacuum Pump . Verify the scan tool MAP pressure parameter decreases between 30-38 kPa (4.4-5.5 psi).
    • If the parameter does not decrease between 30-38 kPa (4.4-5.5 psi). 

      Replace the B74 Manifold Absolute Pressure sensor.

    • If the parameter does decrease between 30-38 kPa (4.4-5.5 psi). 
  4. All OK.

Erratic Signal Test

  1. Ignition OFF, remove the B74 Manifold Absolute Pressure sensor and disconnect the harness.
  2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 of the sensor and the sensor harness.
  3. Install a jumper wire between the low reference circuit terminal 2 of the sensor and ground.
  4. Install a jumper wire to the signal circuit terminal 3 of the sensor.
  5. Connect a DMM between the jumper wire and ground.
  6. Ignition ON, observe the DC voltage on the DMM. Slowly apply between 0-15kPa of vacuum to the sensor with the GE-23738-A  Vacuum Pump. Verify the voltage changes, without any spikes or dropouts, between 4.9-0.2 V.
    • If not between 4.9-0.2 V or has spikes or dropouts 

      Replace the B74 Manifold Absolute Pressure sensor.

    • If between 4.9-0.2 V and there are no spikes or dropouts 
  7. All OK.
scientia non olet · About LEMON Manuals