Monte Carlo V6-262 4.3L VIN Z TBI (1985)
Fig. 005 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 Drive or Reverse range.
3.
Checks for faulty wiring to ECM or faulty ECM itself. If voltage is present, it means wiring and ECM are OK.
