Diagnostic Manual, Chassis and Drivetrain,
Volume 2
Mechanical Test Program - Test
| Test step |
Test scope |
Test connection
|
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
Frictional torque without ASD engaged |
|
Torque wrench
(15 - 65 Nm)
|
|
Turn torque wrench through 90° (see  42, Figure 2).
Observe and record the value.
|
See  2.0
|
2.0
|
| 2.0 |
Frictional torque with ASD engaged
|
|
N30/2
Torque wrench
(80 - 260 Nm)
|
|
Disconnect ASD control module (N30/2).
Return wheel to its starting position in 1.0
(see 42, Figure 2).
Engine: at Idle
Pressure within hydraulic system:
without pressure reservoir
50 - 63 bar.
with pressure reservoir
27 - 33 bar.
(see 33 2.0, 3.0)
Turn torque wrench through 90° (see 42, Figure 2).
Observe and record the value.
|
Measured frictional torque in 2.0 minus
measured frictional torque
in 1.0:
> 100 Nm.
|
If frictional torque difference is
< 100 Nm, replace rear axle center piece.
|
|
Printable version
