Grand Cherokee 4WD V8-5.2L VIN Y (1998)
2. Test the MAP sensor output voltage at the MAP sensor connector between terminals A and B. With the ignition switch ON and the engine OFF,
output 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 the same voltage described above to verify the wire harness condition. Repair as necessary.
4. Test MAP sensor supply voltage at sensor connector between terminals A and C with the ignition ON. The voltage should be approximately 5
volts (±0.5V). Five volts (±O.5V) should also be at cavity A-17 of the PCM wire harness connector. Repair or replace the wire harness as
necessary.
5. Test the MAP sensor ground circuit at sensor connector terminal-A and PCM connector A-4. Repair the wire harness if necessary.
