DTC Troubleshooting: P0107 (3-1)

DTC P0107: MAP Sensor Circuit Low Voltage

1. Turn the ignition switch ON (II).

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

Is about 0.2 V or less 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. Turn the ignition switch OFF.

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

1. Turn the ignition switch ON (II).

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

Is about 0.2 V or less indicated?

YES | - | Go to Step 12 .
NO | - | Go to Step 7 .

1. Measure voltage between MAP/IAT sensor 4P connector terminals No. 1 and No. 4.

Is there about 5 V?

YES | - | Go to Step 15 .
NO | - | Go to Step 8 .

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

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

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

1. Check for continuity between ECM connector No. 1 terminal No. 33 and body ground.

Is there continuity?

YES | - | Go to Step 21 .
NO | - | Repair open in the wire between the MAP/IAT and ECM connector No. 1 terminal No. 33, then go to Step 17 .

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

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

1. Check for continuity between MAP/IAT sensor 4P connector terminal No. 2 and body ground.

Is there continuity?

YES | - | Repair short in the wire between the MAP/IAT sensor and ECM connector No. 1 terminal No. 89, then go to Step 17 .
NO | - | Go to Step 20 .

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 P0107 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 P0107 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. ■