Automatic Transmission

Ignition Switch Input To ECM:

TROUBLESHOOTING HINTS
If the park/neutral position switch harness and individual part check have resulted normal but the park/neutral position switch output is abnormal, check control cable adjustment.

HARNESS TESTING

Ignition Switch Input To ECM:

SCANTOOL TESTING

Automatic Transmission:

Code 18 Switch State

Ignition Switch Input To ECM:

Code 29 Shift Position