LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Engine Controls And Fuel - 6.6L (LMM) - DTC P154B To DTC P2693) >> DTC P244B >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: You must perform the Circuit/System Testing in order to verify the integrity of the exhaust differential pressure sensor circuits before proceeding with Component Testing.
IMPORTANT: You must perform the Repair Verification after completing the Component Testing.
  1. Ignition OFF, remove the exhaust pressure differential pressure sensor.
  2. Install a 3A fused jumper wire between the 5-volt reference circuit terminal 3 and the corresponding terminal of the differential sensor. Install a jumper wire between the low reference terminal 1 of the sensor and ground.
  3. Install a jumper wire between the low reference circuit terminal 1 of the differential sensor and ground.
  4. Install a jumper wire at terminal 2 of the differential sensor.
  5. Connect a DMM between the jumper wire from terminal 2 of the differential sensor and ground.
  6. Ignition ON, with the J 23738-A  or J 35555  connected to the pressure sensor rear pressure port, slowly apply vacuum to the sensor while monitoring the voltage between the signal terminal 2 and the low reference terminal 1. See Special Tools . The voltage should vary between 4.8-0.4 volts without any spikes or dropouts.
    • If the voltage is erratic, replace the differential pressure sensor.
scientia non olet · About LEMON Manuals