Grammer MSG 90.6PG - Page 73

Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.4 Fault diagnosis
Page 12 of 16
TABLE OF CONTENTS
5 Inspection of the belt tensioner cable
Preconditions for fault diagnosis:
• Electrical system of the vehicle has been inspected and found to be OK in compliance with the vehicle operating
instructions.
• Seat heater has been inspected and found to be OK.
Note: The components mentioned above are illustrated in Chapter 2.1, if not stated otherwise in this text.
Step
no.
Inspect/operate Result/specified status Troubleshooting
5.1 • Disconnect the electrical connection (E)
between the belt tensioner and the belt
tensioner cable and short-circuit the plug of
the belt tensioner cable.
• Measure the resistance at the contacts in the
plug for vehicle connection (pin assignment for
Actros, Atego, Axor, bus seat):
K1 (brown) Ω K2 (blue)
<< 1 Ω (R→ 0) (pass)
≥ 1 Ω (R→ ∞) (interruption)
End of inspection.
Replace the belt tensioner
cable (see Chapter 3.20).