P0203

DTC P0203: FUEL INJECTORS

G92396t3: CHECK THE INJECTOR COIL RESISTANCE
1. Turn the ignition switch to the OFF position.
2. Disconnect the relevant injector electrical connector (IJ1 to 6).
3. Measure the resistance between the injector pins.

- Is the resistance between 12 and 16 ohms?

-> Yes
GO to Pinpoint Test G92396t4.

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

G92396t4: CHECK THE INJECTOR COIL INSULATION
1. Measure the resistance between the injector pin 1 and the injector body.
2. Measure the resistance between the injector pin 2 and the injector body.

- Are both resistances greater than 10 Mohms?

-> Yes
GO to Pinpoint Test G92396t5.

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

G92396t5: CHECK THE INJECTOR SUPPLY VOLTAGE
1. Turn the ignition switch to the ON position.
2. Disconnect the relevant injector harness electrical connector (IJ1 to 6).
3. Measure the voltage between the relevant injector harness electrical connector (IJ1 to 6) pin 2 and GROUND.

- Is the voltage greater than 12 Volts?

-> Yes
GO to Pinpoint Test G92396t6.

-> No
REPAIR the circuit between the relevant injector harness electrical connector, (IJ1 to 6) pin 2 and battery. This circuit includes the power distribution fuse box, fuse 41, and the EMS control relay. For additional information, refer to wiring diagrams. CLEAR DTC. TEST the system for normal operation.

G92396t6: CHECK THE INJECTOR GROUND CIRCUIT
1. Turn the ignition switch to the OFF position.
2. Disconnect the ECM electrical connector EN16.
3. Measure the resistance between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and EN16 pins as follows:
- Injector 1 pin 1 (NW) and ECM pin 115.
- Injector Cyl 3 pin 1 (N) and ECM pin 114.
- Injector Cyl 5 pin 1 (NR) and ECM pin 113.
- Injector Cyl 2 pin 1 (NU) and ECM pin 120.
- Injector Cyl 4 pin 1 (NG) and ECM pin 119.
- Injector Cyl 6 pin 1 (NY) and ECM pin 118.

- Is the resistance less than 5 ohms?

-> Yes
GO to Pinpoint Test G92396t32.

-> No
REPAIR the circuit between the relevant injector harness electrical connector pin 1 and the ECM electrical connector. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

G92396t32: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO BATTERY
1. Measure the voltage between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and GROUND.

- Is the voltage greater than 1 volt?

-> Yes
REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No
GO to Pinpoint Test G92396t33.

G92396t33: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between the relevant injector harness electrical connector (IJ1 to 6) pin 1 and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new ECM. Before replacing a ECM, contact Dealer technical support.