P0108

DTC P0108 Manifold Absolute Pressure Sensor (MAP) Circuit High Voltage

DESCRIPTION

The MAP sensor is essentially a strain gauge used to measure the pressure in the surge tank. Inside the sensor is a metal diaphragm with a small wire attached. The diaphragm flexes according to changes in pressure. When the diaphragm flexes, the wire attached to it stretches, changing the resistance of the wire. ECU applies five volts to the MAP sensor and measures the voltage drop across the sensor. The sensor output is in volts and as pressure decreases, the voltage drop across the sensor increases. Since the MAP sensor is used as an air flow sensor, the sensor signal is an important input. The ECU uses the information to determine fuel amount and ignition timing.

DTC Detection Condition:

Circuit Diagram:

Part 1:

Part 2:

TEST PROCEDURE