Mid 140 Pid 178 Air Suspension Pressure, Front, Check - Volvo VN 2003 Service Manual

Group 38 Fault Codes, Instrument Cluster
3811-21-02-16
MID 140 PID 178 Air Suspen-
sion Pressure, Front, Check
Special tools: 9998699, 9813194
Other special equipment: J39200
NOTE!
•
Read off other fault codes for the instrument cluster.
•
Ignition off.
•
Check all the relevant connectors. Check for loose
connections, contact resistance and oxidation. For a
detailed description of electrical fault tracing, see
separate service information under function group
371.
Tests in VCADS Pro
The following tests are useful for a closer examination of
the component function:
•
"3810–08–02–01 Instrument cluster test".
•
"3810–08–02–02 Gauge checks, instrument cluster".
Measurement at the component's
connector to the instrument cluster
Note: Faults in the instrument cluster cable harness can
damage the component. Check the component if any of
the readings is outside its permitted range.
Ground cable
1
Requirements:
•
The connector for the air suspen-
sion pressure sensor (B56)
disconnected.
•
Measuring resistance using a
multimeter.
•
Instrument cluster connected.
•
Ignition off.
•
Measurement to the instrument
cluster.
Measuring Nominal value
points
R ≈ 0
B56, pin A -
ground
Note: If the correct value is not
achieved, remove the voltage from the
battery and measure again.
44
J39200
Supply cable
2
Requirements:
•
The connector to the sensor (B56)
is disconnected.
•
Measuring voltage using the multi-
meter.
•
Instrument cluster connected.
•
Ignition key in the drive position.
•
Measurement to the instrument
cluster.
Measuring Nominal value
points
V ≈ 5 V
B56, pin B -
ground
Cable harness
3
For checking the cable harness, see
service information under function
group 371.
Troubleshooting
J39200