The vehicle has one or several of the following symptoms:
• Fault message on the instrument panel related to the braking system or stability failure of the hydraulic system.
• Fault message on the display screen related to the braking system or stability failure of the hydraulic system.
In the workshop is observed as follows:
• It is possible to correct the faults and restore the function of the hydraulic system during the vehicle start-up.
NOTE: The above symptoms are reproduced when the vehicle is started. |
Absence of the connection cable to the hydraulic pump control unit (HCU). |
Repair procedure:
• Confirm that the symptoms mentioned in the symptom field of this technical bulletin are present.
• Remove the storage unit, located under the bonnet.
Repair procedure for model Y:
• Remove the air filter.
• Disconnect the supplement battery (12 V).
• Remove the retaining clip from the high voltage battery cable.
• Remove the clips securing the coolant pipe to the battery.
• Loosen the upper bolts of the shock absorber tower (see picture 1.A).
• Remove the remaining screws from the shock tower.
• Move the shock tower brace forward.
• Move the lock to the red position and raise the cam, then remove the X151 connector from the hydraulic pump control unit (HCU). If necessary, remove the cables to allow movement of the X151 connector and work in a comfortable position (see Picture 1B).
• Remove the clamp on the back of the X151 connector.
• Release the tabs on both sides that secure the X151 connector.
• Remove the connector cover (See picture 1.B).
• Remove the insulation tape from the electrical wires of the X151 connector at a distance of approximately 150 mm.
• Move the lock on connector X151 from the CLOSE position to the OPEN position (see Picture 1C).
• Remove terminal 28 from connector X151.
• Release the lock on terminal 25 of connector X151 (See picture 1.D).
• Remove the yellow cable from connector 25 (See picture 1.E).
• Cut the yellow wire 100 mm from the end of the terminal.
• Cut the yellow wire at the other end to split it into two equal pieces and attach an appropriate terminal to terminal 28 of connector X151.
• Overlay a heat-shrink sleeve on the solder joint for the jumper connectors (see picture 2.B).
• Solder from the connection joint to the wiring harness cable (see picture 2.A).
• Connect the small terminal to receptacle 28 and the long terminal to receptacle 25.
• Check the correct connection of the terminals to connector X151 (see picture 2.C).
• Move the X151 connector lock from the OPEN position to the CLOSE position.
• Pack excess cable carefully with yellow tape and wrap the cable assembly with anti-abrasive tape.
• Connect the X151 connector and close the X151 connector cover, ensuring that the tabs are securely closed.
• Put a clamp on the back of the connection and tighten it.
• Connect connector X151 to the HCU, lower the lever and move the red lock.
• Reinstall the shock tower brace to its original position, screw in the bolts, and tighten the outer bolts to a torque of 62 Nm.
• Tighten the remaining bolts to a torque of 67 Nm.
• Connect the supplement battery (12 V).
• Connect the storage unit.
Repair procedure for model X:
• Loosen the upper bolts of the shock absorber tower (see picture 1.A).
• Remove the remaining screws from the shock tower.
• Move the shock tower brace forward.
• Move the lock to the red position and raise the cam, then remove the X151 connector from the hydraulic pump control unit (HCU). If necessary, remove the cables to allow movement of the X151 connector and work in a comfortable position (see Picture 1B).
• Remove the clamp on the back of the X151 connector.
• Release the tabs on both sides that secure the X151 connector.
• Remove the connector cover (See picture 1.B).
• Remove the insulating tape from the electrical wires of the X151 connector at a distance of approximately 150 mm (see image).
• Move the lock on connector X151 from the CLOSE position to the OPEN position (see Picture 1C).
• Remove terminal 28 from connector X151.
• Release the lock on terminal 25 of connector X151 (See picture 1.D).
• Remove the yellow cable from connector 25 (See picture 1.E).
• Cut the yellow wire 100 mm from the end of the terminal.
• Cut the yellow wire at the other end to split it into two equal pieces and attach an appropriate terminal to terminal 28 of connector X151.
• Overlay a heat-shrink sleeve on the solder joint for the jumper connectors (see picture 2.B).
• Solder from the connection joint to the wiring harness cable (see picture 2.A).
• Connect the small terminal to receptacle 28 and the long terminal to receptacle 25.
• Check the correct connection of the terminals to connector X151 (see picture 2.C).
• Move the X151 connector lock from the OPEN position to the CLOSE position.
• Pack excess cable carefully with yellow tape and wrap the cable assembly with anti-abrasive tape.
• Connect the X151 connector and close the X151 connector cover, ensuring that the tabs are securely closed.
• Put a clamp on the back of the connection and tighten it.
• Connect connector X151 to the HCU, lower the lever and move the red lock.
• Reinstall the shock tower brace to its original position, screw in the bolts, and tighten the outer bolts to a torque of 62 Nm.
• Tighten the remaining bolts to a torque of 67 Nm.
• Connect the supplement battery (12 V).
• Connect the storage unit.
NOTE: All procedures must be performed with personal protective equipment. |