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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Tow/Haul Switch/Indicator Always On or Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, transmission in Park, disconnect the automatic transmission shift lever electrical connector.
  2. Ignition OFF test for less than 1 ohm between terminal 2 on the automatic transmission shift lever vehicle harness connector and ground at the battery negative post.
    • If greater than the specified valve test the ground circuit for an open/high resistance.
  3. Ignition ON, test for greater than 11 volts on the signal circuit terminal 1 on the automatic transmission shift lever vehicle harness connector, and ground at the battery negative post.
    • If not within the specified value, test the signal circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the BCM.
  4. Ignition OFF, test for less than 3 ohms between terminal 1 and terminal 2 on the automatic transmission shift lever component harness connector while depressing the Tow/Haul switch button.
    • If greater than the specified value, replace the automatic transmission shift lever assembly.
  5. If all circuits test normal, replace the BCM.
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