DTC P0108-A: MAP SENSOR VOLTAGE TOO HIGH 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, monitor MAP sensor voltage. If voltage is 4.6 volts or less, go to next step. If voltage is more than 4.6 volts, go to step 5 .
2. While monitoring scan tool display, wiggle MAP sensor wiring harness. If MAP sensor voltage is 4.6 volts or less, go to next step. If MAP sensor voltage is more than 4.6 volts, repair wiring harness as necessary where wiggling caused problem to appear. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
3. Condition to set trouble code is not present at this time. MAP SENSOR VOLTAGE TOO HIGH DTC sets if MAP sensor signal voltage is more than 4.9 volts at start or with engine running for 2 seconds. Possible causes are: MAP sensor signal is open, MAP sensor open internally, MAP sensor ground circuit open, MAP sensor signal circuit shorted to voltage, PCM failure, faulty connections or wiring. Go to next step.
4. 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 25. 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) .
5. Turn ignition off. Disconnect MAP sensor electrical connector. Turn ignition on. Using a voltmeter, check voltage of MAP sensor signal circuit at MAP sensor connector. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S05290732922000030800000) table. If voltage is 5.5 volts or less, go to next step. If voltage is more than 5.5 volts, repair short to voltage on MAP sensor signal circuit. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
6. Turn ignition off. Connect a jumper wire between MAP sensor signal circuit and MAP sensor ground circuit at MAP sensor connector. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S05290732922000030800000) table. Turn ignition on. Using scan tool read MAP sensor voltage. If scan tool displays one volt or more, go to next step. If scan tool displays less than one volt, replace MAP sensor. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .
7. Turn ignition off. Move jumper wire from MAP sensor ground circuit to engine ground. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S05290732922000030800000) table. Turn ignition on. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is one volt or more, go to next step. If voltage is less than one volt, repair open MAP sensor ground circuit. 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 of MAP sensor signal circuit between MAP sensor connector and PCM connector terminal No. 36. See «MAP SENSOR CONNECTOR WIRE IDENTIFICATION»(ref-576-S05290732922000030800000) table and «PCM CONNECTOR WIRE IDENTIFICATION»(ref-576-S37789657432000030800000) table. If resistance is less than 5 ohms, replace PCM. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) . If resistance is 5 ohms or more, repair open MAP sensor signal circuit. Perform «TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES»(ref-576-S36272092702000030800000) .

MAP SENSOR CONNECTOR WIRE IDENTIFICATION

PCM CONNECTOR WIRE IDENTIFICATION