Group 38 Fault Codes, Instrument Cluster Troubleshooting
3811-21-02-05
MID 140 PID 177 Transmission
Oil Temperature, Check
Special tools: 9998699, 9813194
Other special equipment: J39200, 9990008
NOTE!
•
Read other fault codes for the instrument cluster.
•
Turn the ignition OFF before disconnecting the con-
nector.
•
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 sensor dis-
connected.
•
Measuring resistance using a
multimeter.
•
Instrument cluster connected.
•
Ignition off.
•
Measurement to the instrument
cluster. (See page 40 for mea-
surement points.)
Measuring
points
Nominal value
B - ground R ≈ 0
Note: If the correct value is not
achieved, disconnect the voltage from
the battery.
J39200
9990008
Signal cable
2
Requirements:
•
The connector to the sensor is
disconnected.
•
Measuring voltage using the multi-
meter.
•
Instrument cluster connected.
•
Ignition key in the drive position.
•
Measurement to the instrument
cluster. (See page 40 for mea-
surement points.)
Measuring
points
Nominal value
A - ground V
max
≈ 5V
V
min
≈ 0V
J39200
9990008
Cable harness
3
For checking the cable harness, see
service information under function
group 371.
Checking component
Note: Faults in the component may be caused by faults
in the cable harness to the control unit. Check the cable
harness before connecting a new component.
Sensor
1
Requirements:
•
The connector for the sensor dis-
connected.
•
Measuring resistance using a
multimeter.
•
Ignition off.
•
Measurement to sensor.
Measuring
points
Nominal value
Pins B12 - B1 See chart, page
11, for sensor
values.
J39200
41
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