P1108

Q : P1108. MAP SENSOR

G92429t108 : CHECK THE GROUND CIRCUIT TO THE MAP SENSOR
1. Disconnect the MAP sensor electrical connector ENS.
2. Measure the resistance between the MAP sensor electrical connector ENS pin 4 (BG) and GROUND. Reconnect electrical connectors following test.

- Is the resistance less than 5 ohms?

-> Yes

-> No
REPAIR the circuit between the MAP sensor and GROUND. CLEAR the DTC. TEST the system for normal operation.

G92429t109 : 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 ENS pin 2 (OY) and GROUND.

- Is the voltage greater than 6 volts?

-> Yes
REPAIR the short to battery. CLEAR the DTC. TEST the system for normal operation.

-> No

G92429t176 : 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 ENS pin 2 (OY) and GROUND.

- Is the voltage less than 4 volts?

-> Yes
REPAIR the short to GROUND. CLEAR the DTC. TEST the system for normal operation.

-> No

G92429t110 : CHECK CONTINUITY OF THE MAP SENSOR SIGNAL WIRE
1. Turn the ignition switch to the OFF position.
2. Disconnect the MAP sensor electrical connector ENS.
3. Disconnect the ECM electrical connector EN16.
4. Measure the resistance of the circuit between MAP sensor electrical connector ENS pin 1 (BW) and ECM electrical connector EN16 pin 127 (BW).

- Is the resistance less than 5 ohms?

-> Yes

-> No
REPAIR the circuit between the MAP sensor electrical connector ENS pin 1 (BW) and ECM electrical connector EN16 pin 127 (BW). CLEAR the DTC. TEST the system for normal operation.

G92429t50 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO GROUND
1. Disconnect the ECM electrical connector EN16.
2. Disconnect the MAP sensor electrical connector ENS.
3. Measure the resistance between ENS pin 1 (BW) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short to GROUND. 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 ECM

-> No

G92429183 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO BATTERY
1. Connect the ECM electrical connector EN16.
2. Turn the ignition switch to the ON position.
3. Check for a voltage at ENS pin 1 (BW)

- Is the voltage greater than 10 volts?

-> Yes
Repair the short circuit. 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 ECM

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