169000521 - Z67 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 brokenCheck 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