GG. Hot-Starting Problems

GG. Hot-starting problems

Preconditions for troubleshooting
Any fault codes have been dealt with, The engine is hot.
The fault is not intermittent (See GJ. Intermittent Starting Problems). GJ. Intermittent starting problems

GG1




Injection pulses
Connect a voltmeter between 1 and 2 on one of the injectors.
- Operate the starter motor.
The voltmeter should show 200-400 mV.

If the value is OK:
^ Checking the impulse sensor GG3..

If the value differs:
^ Checking the engine temperature sensor GG2.

GG2




Checking the engine temperature sensor
Troubleshoot according to EG. Fault code 1-2-3 Engine temp. sensor signal absent or faulty. DTC 1-2-3

If no fault is found:
^ Return to A. Troubleshooting Layout. A. Troubleshooting Layout

GG3




Checking the impulse sensor.
- Ignition off.
Connect an ohmmeter between 1 and 2 on the impulse sensor.

Impulse sensor 1 389 567-7 (previous version):
The ohmmeter should show approx. 240 ohms at 20°C (68°F)and max. 400 ohms for a warm engine.

Impulse sensor 3 547 847-8 (recent version):
The ohmmeter should show approx. 170 ohms at 20°C (68°F)and max. 350 ohms for a warm engine.

If the value is OK:
^ Checking the fuel pressure and residual pressure GG4.

If the value differs:
^ Test with a new impulse sensor.

GG4




Checking the fuel pressure and residual pressure
Check the fuel pressure and residual pressure according to S. Fuel pressure and residual pressure. S. Fuel Pressure and Residual Pressure

If the fuel and residual pressure are OK:
^ Return to A. Troubleshooting Layout. A. Troubleshooting Layout