Checking the Collapsible Head Restraint

Checking the collapsible head restraint

Checking the relay
Check relay 2/75 operation by activating and deactivating the relay several times. The relay is working if a clicking noise is heard when activating and deactivating.
If the relay is not working, replace it with a new relay.

Additional information:
- To access relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.









Is there a fault?

Yes - FAULT FOUND

No - Checking the wires and components

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Checking the wires and components
Check that the fuses 11D/7 and 11E/6 are intact.
Check the wire between fuse 11D/7 2 and relay 2/75 5 for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the wire between relay 2/75 3 and left and right head restraint solenoid connector 1 for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the wire between the respective head restraint solenoid connector 4 and the ground point for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Do the necessary corrective action.
Check the respective head restraint solenoid resistance. Too high a resistance value means an open circuit in the solenoid and too low a resistance value indicates a short circuit in the solenoid. If there is a solenoid fault, replace the head restraint.

Hint: A fault-free head restraint solenoid has a resistance of 2.0 - 2.5 ohm. The resistance is most appropriately measured between the respective head restraint solenoid connector 1 and 4.

Additional information:
- To access relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
- For replacement of head restraint, see Outer head restraint .
- For connection of test box, rear electronic module (REM), see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM).













Has the fault been found?

Yes - FAULT FOUND

No - No Fault Found

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