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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the ECM, and TCM.
  2. Connect a DMM at the ECM, between the brake signal circuit and the positive terminal of the battery.
  3. Ignition ON, test for less than 0.1 volt
    • If greater than the specified range, test the brake signal circuit for a short to ground. If the circuit/connections test normal, replace the BCM.
  4. Leave the DMM connected, connect the TCM harness connector.
  5. Ignition ON, test for less than 0.1 volt
    • If greater than the specified range, replace the TCM
  6. If the voltage is correct and all circuits/connections test normal, replace the ECM.
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