Grammer MSG95EAC - Page 30

Repair manual GRAMMER seat suspension MSG95EAC – November 2012
Material no. 1 277 338
2.3 Troubleshooting – Locating the fault
Page 12 of 15
Step
no.
Inspect/operate Result/Specified status Troubleshooting
5.3
• Bridge the pins P6 and P7 in the plug of the cable harness for
seat suspension (STCB J) (assignment for lumbar support).
• Measure the resistance at the pins P3 and P6 at the plug of the
vehicle (STVB K):
P3 (ground) Ω P5 (voltage)
< 1 Ω (R →
→→
→ 0) (pass)
Proceed with inspection step no. 5.4.
>> 1 Ω (R → ∞) (cable break)
Replace the cable harness of the seat
suspension (see Chapter 3.16).
5.4
• Measure resistance between pins P1, P2, P4 and P5 in the
cable harness plug for the seat suspension (STVB J), and the
pins P12, P9, P10 and P11 in the plug of the vehicle (STVB K)
(pin assignment for belt buckle contact and seat occupancy
detection system):
P1 Ω P12
P2 Ω P9
P4 Ω P10
P5 Ω P11
< 1 Ω (R →
→→
→ 0) (pass)
Proceed with inspection step no. 5.5.
>> 1 Ω (R → ∞) (cable break)
Replace the cable harness of the seat
suspension (see Chapter 3.16).
5.5
• Measure the resistance between pin P3 in the plug of the cable
harness of the seat suspension (STVB J) and contact K9 in the
socket of the cable harness of the seat suspension (STCB C)
(fan for climate control system):
P3 Ω K9
< 1 Ω (R →
→→
→ 0) (pass)
Proceed with inspection step no. 5.6.
>> 1 Ω (R → ∞) (cable break)
Replace the cable harness of the seat
suspension (see Chapter 3.16).