2000 Sunbird L4-121 2.0L VIN B 2-bbl (1984)
Fig.161 - Chart C-1A Park/Neutral Switch
1.
Checks for switch closing in the P/N position. This is indicated by low voltage on CKT 434.
2.
Checks to see that voltage increases in D/R range.
3.
Checks for faulty wiring to ECM or faulty ECM itself. If voltage is present, it means wiring and ECM are OK.
