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Pin Voltage Charts: Introduction

  1. ECU circuits are checked at the ECU connector with ignition switch in one or more of the following conditions; ignition switch off, ignition switch on (engine off), or with ignition switch on and engine running. Test each terminal between indicated terminal No. and body ground. Use wire color to help identify terminal. To test pin voltage, carefully backprobe terminal at harness side of ECU connector.
  2. If specified ohm or voltage value is not found, test and repair or replace circuit or affected component. Retest circuit to verify repair has been made. All tests are with ECU harness connected unless noted.
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