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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 >> Traction Off Indicator Inoperative >> Circuit/System Testing
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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. Ignition OFF, disconnect the harness connector at the TCS accessory switch.
  2. Test for less than 1.0 ohm of resistance between the ground circuit terminal H and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Install a 3A fused jumper wire between the signal circuit terminal J and ground. Verify the scan tool EBCM TCS switch parameter is On.
    • If not the specified value, test the signal circuit for a short to open/high resistance. If the circuit tests normal, replace the TCS switch.
  4. Reconnect the harness connector, Ignition ON, verify the scan tool EBCM TCS Data parameter, operate the switch On/Off.
    • If not the specified value, replace the TCS switch.
  5. If all the circuits test normal, test or replace the BCM.
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