CODE 62, GEAR SWITCH ERROR Chevrolet Corsica I

CODE 62, GEAR SWITCH ERROR

The 2nd gear switch should be open in 2nd and 3rd gear. The ECM uses this signal to disengage TCC when downshifting.

Note. Test numbers refer to test numbers on diagnostic chart.

1. "Scan" testers display switch status in different manners. Refer to manufacturer's operating manual to determine proper status display.
2. Determines whether the switch or signal circuit is open. The circuit can be checked for an open by measuring the voltage at the TCC connector. Reading should be about 12 volts.
3. Because the switches should be grounded in this step, disconnecting the TCC connector should cause the "Scan" tester to change status.
4. The switch status should change when the vehicle shifts into 2nd gear.

If vehicle is road tested for a TCC related problem, ensure the switch status does not change while in 3rd gear because the TCC will disengage. If switches change status, carefully check wire harness/routing and connectors.

Code 62, Gear Switch Error Schematic. Scheme 156

Code 62, Gear Switch Error Flow Chart. Scheme 157