Note. Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
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- Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 101 kPa (30 in.Hg, 760 mmHg), or 2.9 V or more 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 sensor and the ECM.
- Turn the ignition switch OFF.
- 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 ON (II).
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 101 kPa (30 in.Hg, 760 mmHg), or 2.9 V or more indicated? YES - Go to step 8. NO - Replace the MAP sensor.
- Remove the jumper wire.
- Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 2. Is there about 5 V? YES - Go to step 10. NO - Go to step 14 .
- Turn the ignition switch OFF.
- Connect ECM connector terminals C7 and C17 with a jumper wire.
- Turn the ignition switch ON (II).
- Check the MAP SENSOR in the DATA LIST with the HDS. Is about 101 kPa (30 in.Hg, 760 mmHg), or 2.9 V or more indicated? YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM; 2000-2001 M/T models (see «HOW TO SUBSTITUTE THE ECM FOR TESTING PURPOSES (2000-2001 M/T MODELS)»(ref-219288-S30600414382006021300000) ), 2002-2006 M/T models and CVT model (see «ECM UPDATING AND SUBSTITUTION FOR TESTING-2002-2006 M/T MODELS AND CVT MODEL»(ref-219288-S14477746672006021300000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-219289-S04050852982006021300000) ). NO - Repair open in the wire between the ECM (C17) and the MAP sensor.
- Turn the ignition switch OFF, and wait for 10 seconds.
- Disconnect ECM connector C (31P).
- Connect MAP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
- Check for continuity between ECM connector terminal C7 and body ground. Is there continuity? YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM; 2000-2001 MAT models (see «HOW TO SUBSTITUTE THE ECM FOR TESTING PURPOSES (2000-2001 M/T MODELS)»(ref-219288-S30600414382006021300000) ), 2002-2006 M/T models and CVT model (see «ECM UPDATING AND SUBSTITUTION FOR TESTING-2002-2006 M/T MODELS AND CVT MODEL»(ref-219288-S14477746672006021300000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-219289-S04050852982006021300000) ). NO - Repair open in the wire between the ECM (C7) and the MAP sensor.