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3rd Gear

2nd gear switch closed

2nd gear signal switch opens

3rd gear signal switch opens

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. Some scan tools display state of these switches in different ways. Be familiar with type of tool being used. since both switches should be in closed state during this test, tool should read the same for either 2nd or 3rd gear switch.
  2. This test determines whether switch or signal circuit is open. Circuit can be checked for an open by measuring voltage with a DVOM at TCC connector. voltage should be about 12 volts.
  3. Because switch(s) should be grounded in this step, disconnecting TCC connector should cause scan tool switch state to change.
  4. Switch state should change when vehicle shifts into 2nd gear.
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