Grammer MSG95EAC - Page 25

Repair manual GRAMMER seat suspension MSG95EAC – November 2012
Material no. 1 277 338
2.3 Troubleshooting – Locating the fault
Page 7 of 15
3 Checking the compressor
Preconditions for fault diagnosis:
• See “Preconditions for fault diagnosis for each test”.
• The air hose to the air distributor has been inspected with regard to kinks, scoring and tightness and found to be OK.
Step
no.
Inspect/operate Result/Specified status Troubleshooting
3.1 • Disconnect the electrical connection (C) between the control / air
reservoir and the cable harness for seat suspension.
• Measure the resistance at the contacts K10 and K2 in the socket
of the cable harness of the seat suspension (STVB C):
K10 (ground) Ω K2 (voltage 12V)
= 0.8 Ω (±
±±
± 10%) (total resistance)
End of inspection.
>> 0.8 Ω (R → ∞) (interruption) or
<< 0.8Ω (R → 0) (short-circuit)
Proceed with inspection step no. 3.2.
3.2 • Disconnect the electrical connection (H) between the
compressor and the right-angle plug of the blue cable.
• Disconnect the electrical connection (G) between the
compressor and the right-angle plug of the black cable.
• Measure the resistance at the contacts of the compressor:
Contact Ω contact
= 0.8 Ω (±
±±
± 10%)
Replace the cable harness of the seat
suspension (see Chapter 3.16).
>> 0.8 Ω (R → ∞) (interruption) or
<< 0.8Ω (R → 0) (short-circuit)
Replace compressor (see Chapter 3.8).