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Home >> GMC >> 2016 >> Terrain SL, Gas >> Repair and Diagnosis >> Electrical >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC B1370: Control Module Ignition On >> Circuit/System Testing

Circuit/System Testing

NOTE:

Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the KR73 ignition main relay.
  2. Test for less than 10 Ω between the ground circuit terminal 85 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the Ignition circuit terminal 86 and ground.
    • If the test lamp does not illuminate, test the Ignition circuit for an open/high resistance. If the circuit tests normal replace the K9 BCM.
  4. Ignition OFF, reconnect the KR73 ignition main relay.
  5. Disconnect the harness connector at the P16 Instrument Cluster.
  6. Ignition ON, verify that a test lamp illuminates between the ignition terminal 31 and ground.
    • If the test lamp does not illuminate and the Ignition fuse is good, test the ignition circuit for an open/high resistance. If the circuit tests normal, replace the KR73 ignition main relay. If the ignition fuse is open, test the ignition circuit for a short to ground. If the circuit tests normal, replace the P16 instrument cluster.
  7. If all circuits test normal, replace the P16 instrument cluster.
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