DTC Troubleshooting: P0107 (3-1)

DTC P0107(3-1):  MAP Sensor Circuit Low Voltage

1.Turn the ignition switch ON (II).

2.Check the MAP with the scan tool.

Is about 101 kPa (760 mmHg, 30 in.Hg) or 2.9 V indicated?


YES - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the  MAP sensor and at the  ECM/ PCM.n


NO - Go to 3.


3.Turn the ignition switch OFF.

4.Disconnect the MAP sensor 3P connector.

5.Turn the ignition switch ON (II).

6.Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3.

 

Is there about 5 V?


YES - Go to 8.


NO - Go to 7.


7.Measure voltage between ECM/PCM connector terminals A11 and A21.

 

Is there about 5 V?


YES - Repair open in the wire between  ECM/ PCM (A21) and the  MAP sensor.n


NO - Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original  ECM/ PCM.n


8.Check the MAP with the scan tool.

Is 2 kPa (15 mmHg, 0.6 in.Hg) or less or 0 V indicated?


YES - Go to 9.


NO - Replace the  MAP sensor.n


9.Disconnect the negative cable from the battery.

10.Turn the ignition switch OFF.

11.Disconnect ECM/PCM connector A (31P).

12.Check for continuity between MAP sensor connector terminal No. 2 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the  ECM/ PCM (A19) and the  MAP sensor.n


NO - Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original  ECM/ PCM.n