Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
voltage should be 4-to-5 volts. The voltage should drop to 1.5-to-2.1 volts with a hot, neutral idle speed condition.
3. Test Powertrain Control Module (PCM) cavity A-27 for same voltage described above to verify wire harness condition. Repair as necessary.
4. Test MAP sensor supply voltage at sensor connector between terminals A and C (Fig. 27) with ignition ON. The voltage should be approximately
5 volts (+/- 0.5V). Five volts (+/- 0.5V) should also be at cavity A-17 of the PCM wire harness connector. Repair or replace wire harness as
necessary
5. Test the MAP sensor ground circuit at sensor connector terminal-A (Fig. 27) and PCM connector A-4. Repair wire harness if necessary.
Refer Wiring Diagrams for cavity locations.
