DTC P0107-A: MAP SENSOR VOLTAGE TOO LOW Chrysler LHS II

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

Note. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

1. Start engine. Using scan tool, read MAP sensor voltage. If MAP sensor is less than .2 volt, go to step 6 . If MAP sensor voltage is .2 volt or more, go to next step.
2. Turn ignition on with engine off. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is less than 2.35 volts, go to step 6 . If MAP sensor voltage is 2.35 volts or more, go to next step.
3. While monitoring scan tool display, wiggle MAP sensor wiring harness. If any change in MAP sensor voltage occurred, repair wiring harness as necessary where wiggling caused voltage to change. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) . If voltage did not change, go to next step.
4. Condition to set trouble code is not present at this time. MAP SENSOR VOLTAGE TOO LOW DTC sets if MAP sensor signal voltage is less than 1.2 volts at engine start or less than .4 volt for 2 seconds with engine running. Possible causes are: open 5-volt supply circuit, signal circuit shorted to ground, failed MAP sensor, PCM failure faulty connections or wiring. Go to next step.
5. Inspect all related wiring and connectors and repair as necessary. Using scan tool, read FREEZE FRAME data. Ensure hex code matches DTC on scan tool. Hex code should be 24. Use this information for additional diagnostics. If no problems were found with wiring and connectors, see «INACTIVE TROUBLE CODE CONDITION»(ref-576-S27765318282000030800000) under SELF-DIAGNOSTICS. Test is complete. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) . If related wiring and connectors were repaired, perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
6. Turn ignition off. Disconnect MAP sensor electrical connector. Using a voltmeter, check voltage of MAP sensor 5-volt supply circuit at MAP sensor connector. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S20624342502000030800000) table. If voltage is 4.5 volts or more, go to next step. If voltage is less than 4.5 volts, repair open 5-volt supply circuit. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
7. Using scan tool, read MAP sensor voltage. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, replace MAP sensor. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, check resistance between MAP sensor signal circuit and MAP sensor ground circuit on MAP sensor connector. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S20624342502000030800000) table. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair MAP sensor signal circuit for a short to MAP sensor ground circuit. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
9. Using an ohmmeter, check resistance of MAP sensor signal circuit between MAP sensor connector and ground. If resistance is less than 5 ohms, repair short to ground in MAP sensor signal circuit. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) . If resistance is 5 ohms or more, replace PCM. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .

MAP SENSOR CONNECTOR WIRE IDENTIFICATION