DTC Troubleshooting: P0108 (3-2)

DTC P0108: MAP Sensor Circuit High Voltage

1. Turn the ignition switch ON (II).

1. Check the MAP SENSOR in the DATA LIST with the HDS.

Is about 4.90 V or higher indicated?

YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP/IAT sensor and the ECM.■

1. Check for Temporary DTCs or DTCs with the HDS.

Are DTC P0098 and P0108 indicated at same time?

YES | - | Go to Step 4 .
NO | - | Go to Step 14 .

1. Turn the ignition switch OFF.

1. Disconnect the MAP/IAT sensor 4P connector.

1. Connect MAP/IAT sensor 4P connector terminals No. 2 and No. 4 with a jumper wire.

1. Turn the ignition switch ON (II).

1. Check the MAP SENSOR in the DATA LIST with the HDS.

Is about 4.90 V or higher indicated?

YES | - | Go to Step 9 .
NO | - | Go to Step 24 .

1. Turn the ignition switch OFF, and wait 30 seconds.

1. Remove the jumper wire from the MAP/IAT sensor 4P connector.

1. Disconnect ECM connector No. 1 (96P).

1. Connect MAP/IAT sensor 4P connector terminal No. 4 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 1 terminal No. 11 and body ground.

Is there continuity?

YES | - | Go to Step 30 .
NO | - | Repair open in the wire between the MAP/IAT sensor and ECM connector No. 1 terminal No. 11, then go to Step 26 .

1. Turn the ignition switch OFF.

1. Disconnect the MAP/IAT sensor 4P connector.

1. Connect MAP/IAT sensor 4P connector terminals No. 3 and No. 4 with a jumper wire.

1. Turn the ignition switch ON (II).

1. Check the MAP SENSOR in the DATA LIST with the HDS.

Is about 4.90 V or higher indicated?

YES | - | Go to Step 19 .
NO | - | Go to Step 24 .

1. Turn the ignition switch OFF, and wait 30 seconds.

1. Remove the jumper wire from the MAP/IAT sensor 4P connector.

1. Disconnect ECM connector No. 1 (96P).

1. Connect MAP/IAT sensor 4P connector terminal No. 2 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 1 terminal No. 89 and body ground.

Is there continuity?

YES | - | Go to Step 30 .
NO | - | Repair open in the wire between the MAP/IAT sensor and ECM connector No. 1 terminal No. 89, then go to Step 26 .

1. Turn the ignition switch OFF.

1. Replace the MAP/IAT sensor.

1. Reconnect all connectors.

1. Turn the ignition switch ON (II).

1. Reset the ECM with the HDS.

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0108 is indicated, check for poor connections or loose terminals at the MAP/IAT sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■

1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0108 is indicated, check for poor connections or loose terminals at the MAP/IAT sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■