Pinpoint Test G239843P19

PINPOINT TEST G239843p19 : CHECK THE SUPPLIES AND GROUNDS TO THE ENGINE CONTROL MODULE (ECM)

G239843t87 : CHECK THE PERMANENT SUPPLY TO THE ECM
1. Disconnect the ECM electrical connector, PI01.
2. Measure the voltage between PI01, pin 22 (NR) and GROUND.

- Is either voltage less than 10 volts?

-> YES
REPAIR the circuit between the ECM and battery. This circuit includes the front power distribution box (fuse 17). TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t88.

G239843t88 : CHECK THE EMS SUPPLY TO THE ECM
1. Turn the ignition switch to the ON position.
2. Make sure the EMS relay is energized.
3. Measure the voltage between PI01, pins 23 and 24 (WG) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the ECM and battery. This circuit includes the front power distribution box (fuse 12) and the EMS relay. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t89.

G239843t89 : CHECK THE POWER GROUND TO THE ECM
1. Measure the resistance between PI01, pin 04 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. TEST the system for normal operation.

-> NO
CHECK for DTCs indicating a network or module fault. REFER to the DTC index.