Fault
Vehicles horn may sound intermittently without the driver pressing the horn pad. This may occur when the vehicle is parked in a warm area for some period of time.
Cause
This issue is caused by a short circuit within the clock spring assembly.
Remedy
Confirm the fault with the clock spring assembly and supply and fit a new modified clock spring assembly as required.
Ensure the VIN is supplied when ordering new parts as the absence/presence of HID headlights will dictate the part number of the clock spring.
It should be noted when carrying out repairs to the valvetrain of models above equipped with the FB engine that there has infact been a change to the design of the valve springs. The coils of the newly designed valve springs are closer together at the bottom of the spring and further apart at the retainer end of the spring. When new the springs are also marked with green paint (as opposed to red) to aid in identification.
In the event the valve springs are replaced, it is important not to mix the old and new style springs. The differences between the types of valve springs are as follows:
Old Style
P/N: 13217AA540
Spring Height: 38.6mm
Configuration: Standard Pitch
Red Paint Mark
New Style
P/N: 13217AA520
Spring Height: 41.06mm
Configuration: Variable Pitch
Green Paint Mark
Issue
Intake Air Volume Learn procedure will not complete on scan tool.
Procedure
With the engine idling, disconnect the Air Flow Meter for 15 seconds until either of the following fault codes are set:
P0102 - Mass Air Flow MAF Circuit Low
P010C - Mass Air Flow MAF B Circuit Low
If the vehicle is equipped with two Air Flow Meters, disconnect either of them leaving the other one connected.
Reconnect the Air Flow Meter (The engine may stall) and then clear any fault codes that are logged.
Re-attempt Intake Air Volume Learning procedure and check idle is within specifications.
Fault
A loud whining noise may be heard from within the vehicle when cruising at approximately 100km/hr.
Cause
This can be caused by meshing of the gears in the rear differential and is transmitted through the chassis of the vehicle.
Remedy
Replace the driveshaft with revised version which incorporates a two stage uni-joint and different transmission output flange.
Important
When securing the new uni-joint to the transmission output flange, be careful not to tighten the bolts by rotating the bolt head. The bolt head should be held stationary, and the nut rotated until tight (90nM). Rotating the bolt heads will cause the bushings to distort.
Part numbers should be as follows, however suitability should always be confirmed against the VIN.
26 10 7 526 500 - E65 driveshaft with two-stage joint
26 10 7 526 496 - E66 driveshaft with two-stage joint
24 20 7 526 637 - Transmission output flange
26 11 1 229 122 - Bolt, M12 x 1.5 x 68.5 (3 required)
07 12 9 900 047 - Nut, M12 x 1.5 (3 required)
26 11 1 227 843 - Nut, M10 (6 required)
