## DTC Troubleshooting: P0108 (3-2)

DTC P0108 (3-2): | MAP Sensor Circuit High Voltage

1. | Start the engine. Hold the engine at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle.

2. | Check the MAP with the scan tool. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher, or about 2.9 V or higher indicated? YES - Go to 3. NO - 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

3. | Turn the ignition switch OFF.

4. | Disconnect the MAP sensor 3P connector.

5. | Connect the MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.

6. | Turn the ignition switch ON (II).

7. | Check the MAP with the scan tool. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher, or about 2.9 V or higher indicated? YES - Go to 8. NO - Replace the MAP sensor.n

8. | Remove the jumper wire.

9. | Measure voltage between the MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to 10. NO - Repair open in the wire between the ECM/PCM (A11) and the MAP sensor.n

10. | Turn the ignition switch OFF.

11. | Connect ECM/PCM connector terminals A11 and A19 with a jumper wire.

12. | Turn the ignition switch ON (II).

13. | Check the MAP with the scan tool. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher, or about 2.9 V or higher indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n NO - Repair open in the wire between the ECM/PCM (A19) and the MAP sensor.n