Code No. P0108: Manifold Absolute Pressure Sensor Circuit High Input

OPERATION

• A power voltage of 5 V is applied to the manifold absolute pressure sensor power terminal from the engine-ECU connector terminal MAP5 and earthed to the engine-ECU connector terminal MAPE from the manifold absolute pressure sensor.
  
• The sensor signal is inputted to the engine-ECU connector terminal MAP from the manifold absolute pressure sensor output terminal.
  

FUNCTION

• The manifold absolute pressure sensor detects a change in inlet manifold pressure and inputs the signal to the engine-ECU.
  
• In response to the signal, the engine-ECU corrects the fuel injection amount, etc.
  

TROUBLE JUDGEMENT

• Engine coolant temperature is more than 0°C at the engine starts.
  

• More than 8 minutes have passed since the engine starting sequence was completed, when the engine coolant temperature at engine start is less than 0°C.
  

• Manifold absolute pressure is 117 kPa or higher for 2 seconds.
  

FAIL-SAFE AND BACKUP FUNCTION

• Control as if the inlet manifold vacuum pressure is 101 kPa.
  

PROBABLE CAUSES

• Failed manifold absolute pressure sensor
  
• Open circuit in manifold absolute pressure sensor circuit or loose connector contact
  

• Failed engine-ECU
  

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

	Go to Step 2.

	Go to Step 5.

	Go to Step 3.

	Go to Step 4.

	Repair the connector(s) or wiring harness.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

	Replace the engine-ECU.

	Go to Step 6.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

	Replace the engine-ECU.

	Check end.