Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
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- Turn the ignition switch to ON (II).
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more 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 and the ECM/PCM.
- Turn the ignition switch to LOCK (0).
- Disconnect the MAP sensor 3P connector.
- Connect MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
- Turn the ignition switch to ON (II).
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more indicated? YES -Go to step 8. NO -Go to step 19 .
- Remove the jumper wire from the MAP sensor 3P connector.
- Measure the voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 15 . NO -Go to step 10.
- Turn the ignition switch to LOCK (0).
- Jump the SCS line with the HDS.
- Disconnect ECM/PCM connector A (31P).
- Connect MAP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
- Check for continuity between ECM/PCM connector terminal A24 and body ground. Is there continuity? YES -Go to step 27 . NO -Repair open in the wire between the ECM/PCM (A24) and the MAP sensor, then go to step 21 .
- Turn the ignition switch to LOCK (0).
- Connect ECM/PCM connector terminals A24 and A30 with a jumper wire.
- Turn the ignition switch to ON (II).
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more indicated? YES -Go to step 26 . NO -Repair open in the wire between the ECM/PCM (A30) and the MAP sensor, then go to step 21 .
- Turn the ignition switch to LOCK (0).
- Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(ref-355245-S29835499672010012100000) ).
- Reconnect all connectors.
- Turn the ignition switch to ON (II).
- Reset the ECM/PCM with the HDS.
- Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-290807-S02808252682008072200000) ).
- 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 and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
- Turn the ignition switch to LOCK (0).
- Reconnect all connectors.
- Update the ECM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355245-S27182940282010012100000) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM/PCM»(ref-290833-S34742010492008072200000) ).
- 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 and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-290833-S34742010492008072200000) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355245-S09328189752010012100000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.