DTC Troubleshooting: P0108 (3)
DTC P0108:
 MAP Sensor Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  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, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 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 sensor/IAT sensor 2 4P connector.
  1. Connect MAP sensor/IAT sensor 2 4P connector terminals No. 1 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 2 minutes.
  1. Remove the jumper wire from the MAP sensor/IAT sensor 2 4P connector.
  1. Disconnect ECM connector No. 1 (96P).
  1. Connect MAP sensor/IAT sensor 2 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 sensor/IAT sensor 2 and ECM connector No. 1 terminal No. 11, then go to Step 26 .
  1. Turn the ignition switch OFF.
  1. Disconnect the MAP sensor/IAT sensor 2 4P connector.
  1. Connect MAP sensor/IAT sensor 2 4P connector terminals No. 1 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 2 minutes.
  1. Remove the jumper wire from the MAP sensor/IAT sensor 2 4P connector.
  1. Disconnect ECM connector No. 1 (96P).
  1. Connect MAP sensor/IAT sensor 2 4P connector terminal No. 1 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 sensor/IAT sensor 2 and ECM connector No. 1 terminal No. 89, then go to Step 26 .
  1. Turn the ignition switch OFF.
  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.
Is DTC P0108 indicated?
YES -
Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0108 indicated?
YES -
Check for poor connections or loose terminals at the MAP sensor/IAT sensor 2 and the ECM. If the ECM was updated, substitute a known-good ECM, then recheck. If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■