Wiring Harness: Testing and Inspection

WM 974549 Eliminating noise symptoms - Reworking wire harness for battery wiring (clicking noise from fuel injectors)

Technical values





General information

Symptom

Clicking noises (fuel injectors) when the engine is warm and cold.

Causes and remedial action

The ground strap is touching the valve cover and transmits the fuel injector noises to the passenger compartment when the engine is warm and cold.

In the event of a complaint, the ground strap must be fitted in the bracket for the valve cover to remedy the situation on vehicles manufactured before the date of introduction February 2007.

Preliminary work

1. Remove rear underbody cover. -> 519419 Removing and installing cover for rear underbody - section on "Removing" 519419 Removing and Installing Cover for Rear Underbody

Reworking wire harness for battery wiring

Reworking ground strap on engine





Installation position of wire harness for battery wiring

WARNING

Engine is hot.

- Danger of burns.

-> Only work on engine when it is "cold".
-> Wear protective clothes, gloves and goggles.

1. Loosen fastening screw -1- slightly. Fit ground strap -2- in the bracket so that there is no contact with the valve cover -3-.





Securing ground strap

2. Tighten fastening screw -1-. => Tightening torque: 23 Nm (17 ftlb.)

Subsequent work

1. Install rear underbody cover. -> 519419 Removing and installing underbody cover - section on "Installing" 519419 Removing and Installing Cover for Rear Underbody

Working times

97454900: Reworking wire harness for starter battery; Labor time 60 TU