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Circuit Test: Es300

  1. Remove starter relay from underhood junction block. Check for battery voltage at junction block relay cavity terminal No. 5. Turn ignition to START. Check for battery voltage at junction block relay cavity terminal No. 1. Turn ignition off. Check for continuity between junction block relay cavity terminal No. 2 and ground.
  2. Check for continuity between junction block relay cavity terminal No. 5 and starter terminal No. 1 (Black/Red wire). Remove glove box. Using DVOM, backprobe ECM 31-pin connector E7 terminal No. 11 (Gray wire). See Fig 1. Check for voltage with ignition in START position. Repair as necessary.
Fig 1: Measuring Voltage At ECM Connector E7 (ES300)
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