P1108

Q : P0105, P0106, P0107, P0108, P1107, P1108. MAP SENSOR

Q1 : CHECK THE GROUND CIRCUIT TO THE MAP SENSOR

1. Disconnect the MAP sensor electrical connector EN8.
2. Measure the resistance between the MAP sensor electrical connector EN8 pin 4 (BG) and GROUND.
Reconnect electrical connectors following test.

Is the resistance less than 5 ohms?
Yes
Goto Q2

No
REPAIR the circuit between the MAP sensor and GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

Q2 : CHECK THE POWER SUPPLY CIRCUIT TO THE MAP SENSOR FOR SHORT TO BATTERY

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the MAP sensor electrical connector EN8 pin 2 (OY) and GROUND.

Is the voltage greater than 6 volts?
Yes
REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Goto Q3

Q3 : CHECK THE POWER SUPPLY CIRCUIT TO THE MAP SENSOR FOR SHORT TO GROUND

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the MAP sensor electrical connector EN8 pin 2 (OY) and GROUND.

Is the voltage less than 4 volts?
Yes
REPAIR the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Goto Q4

Q4 : CHECK CONTINUITY OF THE MAP SENSOR SIGNAL WIRE

1. Turn the ignition switch to the OFF position.
2. Disconnect the MAP sensor electrical connector EN8.
3. Disconnect the PCM electrical connector EN16.
4. Measure the resistance of the circuit between MAP sensor electrical connector EN8 pin 1 (BW) and PCM electrical connector EN16 pin 127 (BW).

Is the resistance less than 5 ohms?
Yes
Goto Q5

No
REPAIR the circuit between the MAP sensor electrical connector EN8 pin 1 (BW) and PCM electrical connector EN16 pin 127 (BW). For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

Q5 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO GROUND

1. Disconnect the PCM electrical connector EN16.
2. Disconnect the MAP sensor electrical connector EN8.
3. Measure the resistance between EN8 pin 1 (BW) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
The fault could be in any of the components or sensors in the 5 volt supply circuit, or the PCM

No
Goto Q6

Q6 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO BATTERY

1. Connect the PCM electrical connector EN16.
2. Turn the ignition switch to the ON position.
3. Check for a voltage at EN8 pin 1 (BW)

Is the voltage greater than 10 volts?
Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
The fault could be in any of the components or sensors in the 5 volt supply circuit, or the PCM

No
INSTALL a new MAP sensor. CLEAR the DTC. TEST the system for normal operation.