Question about 2003 Volkswagen Jetta TDI

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Change battery alternater. 2 day after stop ,cant start,

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1. Check up the crankshaft position (CKP) sensor. Component disconnected: Electrical resistance between nr.#1 and #2 terminals, (see picture below), must have typical value = 450 ... 550 Ohms. CKP sensor incorporates engine speed (RPM) sensor function. Replace sensor if necessary!

change battery alternater. 2 day after stop ,cant - 4b3a5e3.jpg

2. Check up the camshaft position (CMP) sensor. Component disconnected, ignition "ON": Electrical supply voltage between nr.#1 and #3 terminals, (see picture below), must have typical value = 11 ... 14 Volts. Electrical supply voltage between nr.#1 terminal and earth, (see picture below), must have typical value = 11 ... 14 Volts. Engine control relay must be fitted and working correctly in order to carry out supply voltage checks. Replace sensor if necessary!


Posted on Jul 15, 2010

  • TDISLine
    TDISLine Jul 15, 2010

    3. Check up the fuel lift pump.

    3.1. Briefly crank engine. Fuel lift pump should run.

    3.2. If pump does not run.

    3.3. Switch ignition "OFF". Check fuses.

    3.4. Remove fuel lift pump relay.

    3.5. Bridge fuel lift pump relay base terminals nr.#1 and #2 with a switched lead, as in figure below:

    3.6. Switch ignition "ON". Fuel lift pump should run continuously when switch is operated.

    3.7. If pump does not run. Switch ignition "OFF".

    3.8. Disconnect fuel lift pump multi-plug.

    3.9. Switch ignition "ON". Operate switch.

    3.10. Check for battery voltage between harness multi-plug terminals nr.#1 and #4, as in figure below:

    3.11. If battery voltage is not indicated: Check wiring.



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