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Home >> Isuzu >> 2008 >> i-290 Automatic >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> Traction Off Indicator Inoperative >> Circuit/System Testing

Circuit/System Testing

  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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