Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.4
Fault diagnosis
Page 13 of 16
TABLE OF CONTENTS
6 Inspection of the belt buckle contact
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.
• Belt buckle with belt buckle cable 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
6.1
• Switch off the heater (switch for seat heater to
position "0").
• Snap the belt latch into the belt buckle (no
buzzing).
• Measure the resistance at the contacts in the
plug for vehicle connection (pin assignment for
Actros):
K4 (black)
Ω
K5 (blue)
≥
1
Ω
(
R
→ ∞
)
(interruption)
<< 1
Ω
(
R
→
0)
(short-circuit)
Proceed with inspection
step no. 6.2.
Replace the belt buckle
contact (see Chapter 3.28).
