Cadillac 15027967 Switch,Clutch Pedal Position

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If any component fails these checks, replacement may be necessary.

The ignition key should come out only in the Lock position.

For 1995 and 1996 models, raise the vehicle and securely place it on jack stands, then unplug the electrical connector from the Park/Neutral switch. Use an ohmmeter to check continuity across the indicated switch terminals. There should be continuity with the shift lever in Park or Neutral, and no continuity in any other position, except for Reverse, where continuity is expected for the backup lights.

To check the Park/Neutral switch, first ensure that it prevents the engine from starting in any gear other than Park or Neutral (also activates the backup lights on 1995 and later models when in Reverse). On 1994 models, remove the steering column insulator panel and unplug the electrical connector from the switch terminals. On 1995 and later models, raise the vehicle and securely place it on jack stands, then unplug the electrical connector from the Park/Neutral switch. Use an ohmmeter to check continuity across the switch terminals (for 1994 models) or the indicated switch terminals (for 1995 and 1996 models). There should be continuity with the shift lever in Park or Neutral, and no continuity in any other position (except for Reverse on 1995 and later models, where continuity is expected for the backup lights). If the switch doesn't operate as described for 1994 models, replace it; for 1995 and 1996 models, try adjusting it before retesting, and if it still fails, replace it. For removal of the 1994 model switch, unplug the electrical connector and pull the switch straight out of the steering column, then align the actuator with the holes in the shift tube, press down on the front of the switch until the tangs snap into the rectangular holes in the steering column jacket. For adjustment, move the shift lever to the Park position, allowing the main housing and housing back to ratchet the switch to the correct position. Installation is the reverse of removal. For the removal of 1995 and later models, apply the parking brake, place the shift lever in Neutral, disconnect the battery cable, raise the vehicle on jack stands, remove the nut and manual lever, unplug the electrical connector from the switch, and remove the switch retaining bolts. Slide the switch off the manual shaft. Installation involves using a special adjustment tool, aligning the switch with the manual shaft flats, sliding it onto the manual shaft, and securing it with mounting bolts. Remove the adjustment tool and complete the remaining installation steps, tightening the manual lever retaining nut to the specified torque.

Try to start the engine in each gear. The engine should crank only in Park or Neutral. Make sure the steering column lock allows the key to go into the Lock position only when the shift lever is in Park. The ignition key should come out only in the Lock position.

The wiring should be disconnected, and the actuator pried off of the cable shift cam and steering column.

Make sure the steering column lock allows the key to go into the Lock position only when the shift lever is in Park.

The knock sensors detect engine knock. To check them, you should check for reference voltage and resistance.

The camshaft sensor and crankshaft sensor, depending on the engine type, should be checked for resistance and proper signal output.

The engine should crank only in Park or Neutral.

Finally, the knee bolster should be reinstalled.

The oxygen sensor in the exhaust monitors oxygen content. To check it, you can check its millivolt signal while the engine warms up. It is also important to inspect the oxygen sensor heater and ensure it receives proper voltage.