1994 Mercury Capri Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Switch To Ground

NOTE: Enter this test only when directed here from QUICK TESTS or another PINPOINT TEST.
STG CIRCUIT PIN IDENTIFICATION (1)

Switch PCM Pin BOB Pin Wire Color
PSP 1K 19 GRN/RED
PNP/CPP 1G 8 RED/BLU
IDL 1E 28 GRN/ORG
BPS (2) 2L 12 LT GRN/BLK
(1) Output voltage should always be 5 volts regardless of switch position.
(2) Turbo only.

1)Β  Turn ignition off. Install BOB, leaving PCM connected. Measure voltage between BOB test pin for switch in question and ground. Exercise switch. With switch open, voltage should be greater than 10 volts. With switch closed, voltage should be zero. If switch output is not as specified, go to next step. If switch output is as specified, switch is okay.

2)Β  Unplug PCM connectors. Unplug switch in question. Inspect wire between switch and BOB for shorts or open circuits. If wire is okay, go to next step. Repair wire as necessary.

3)Β  Inspect for open circuit in wire between switch in question and ground. Repair wire as necessary. If wire is okay, replace switch.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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