HE. Problems Starting When Warm

HE. PROBLEMS STARTING WHEN WARM

Fault tracing conditions

Any DTCs must be remedied. The engine should be warm. The fault is not intermittent (See HG. Intermittent starting problems).

HE1

Injector Pulses

Connect a voltmeter between terminals 1 and 2 on one of the injectors.




-Operate the starter motor.

The voltmeter should read 200-400 mV.

If this value Is OK

-Check the RPM sensor HE2.

If the reading Is Incorrect

-Check the engine temperature sensor HE3.

HE2

Checking The RPM Sensor




-Ignition off.

Connect an ohmmeter between terminals 1 and 2 on the RPM sensor.

RPM sensor 1 389 567-7 (early models):

The ohmmeter should read approx. 240 OHMS at 20°C (68°F)

and a maximum of 400 OHMS when the engine is warm.

RPM sensor 3 547 847-8 (later models):

The ohmmeter should read approx. 170 OHMS at 20°C (68°F)and a maximum of 350 OHMS when the engine is warm.

If this value is OK

-Check the fuel pressure and residual pressure HE4.

If the reading Is incorrect

-Try using a new RPM sensor.

HE3

Checking The Engine Coolant Temperature (ECT) Sensor




Carry out fault tracing in accordance with ED. DTC 1-2-3. Engine temp. sensor signal absent or faulty.

If no faults are found

-Return to A. How fault tracing is carried out.

HE4

Checking The Fuel Pressure And Residual Pressure




Check the fuel pressure and residual pressure. Fuel Pressure

If fuel pressure and residual pressure are OK

-Return to A. How fault tracing is carried out.