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Fiat Panda Factory Service Manual (2003-2012)23 · Fault diagnosis
23 · Diagnostics

Valve relay error

Make
Fiat
Model
Panda Factory Service Manual
Year
2003–2012
Section
Examiner › Valve relay error
Fault diagnosisValve relay error

VALVE RELAY ERROR

The diagnostic equipment signals the following error: "C1121 Valve Relays"

this error is signalled if the control unit detects an open circuit or short circuit (positive or earth) for the relay or the feedback, if the relay or the operating circuit is damaged

1ELECTRICAL CONNECTION CHECKAll OKProblems encounteredOperation

Check that the electrohydraulic control unit connector is not faulty.

Check that the valve relay connector is not faulty at the pins (on both the wiring side and the control unit side) by carrying out a visual inspection.

In particular, check that:

- They are not oxidized

- They are not distorted or broken

Check the state of the power fuse in the engine compartment junction unit

See E7020 ABS

Move on to Step 2
  • Wiring connections faulty
  • ABS control unit side connector faulty
  • Wiring side connector faulty
  • Fuse faulty

  • Restore the correct connections

    See E7020 ABS

  • Replace the ABS electrohydraulic control unit

    Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT

  • Replace the ABS wiring

    Op. 5505C28 INTERGRATED ENGINE BAY AND ABS SYSTEM WIRING - R R

  • Identify the cause of the problem with the fuse and eliminate it, then replace the fuse

Parts & tools for this job For 2003 Fiat Panda

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