LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0191 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn OFF the ignition. Disconnect the longitudinal accelerometer harness connector. Turn ON the ignition. With a DMM, verify voltage between 11.4 and 12.6 on the LNG rate sensor terminal 1 12-volt reference circuit.
    • If voltage is below 11.4, test for an open or a short to ground on the LNG rate sensor circuit. If the circuit tests normal, replace the EBCM assembly.
  2. Turn OFF the ignition. At the longitudinal accelerometer harness connector, connect a test lamp between the LNG low reference circuit terminal 3 and battery positive voltage. Verify the test lamp illuminates.
    • If the test lamp does not illuminate check for an open in the LGN low reference circuit. If the circuit tests normal, replace the EBCM assembly.
  3. Connect a 3-amp fused jumper wire between the LNG rate sensor 12-volt reference circuit terminal 1 and the longitudinal accelerometer signal circuit terminal 2. Turn ON the ignition and observe the longitudinal accelerometer parameter.
    • If the scan tool displays greater than 1.5g, replace the longitudinal position sensor.
    • If the scan tool displays less than 1.5g, test for an open or short to ground on the longitudinal accelerometer signal circuit. If the circuit tests normal, replace the EBCM assembly.
scientia non olet · About LEMON Manuals