Group 38 Fault Codes, Instrument Cluster
Troubleshooting
MID 140 PID 78 Rear Rear Axle Temperature
W3005583
A03
Instrument cluster
B38RR
Sensor, oil temp, rear rear axle
Fault code
FMI 3
Abnormally high voltage or short-circuit to higher voltage.
Conditions for fault code:
•
If the instrument cluster registers a voltage greater
than 4.5 V the instrument cluster interprets this as a
fault and a fault code is stored.
Possible cause:
•
Open-circuit in the ground lead.
•
Open-circuit in the signal cable.
•
Signal cable short-circuited to higher voltage.
•
Faulty sensor.
•
Contact resistance and oxidation.
Reaction from the instrument cluster:
•
Fault code is stored.
•
Yellow lamp requested.
Noticeable external symptoms:
•
Yellow lamp lights up.
•
The display shows an icon and the text ”NO DATA”.
Appropriate check:
•
“MID 140 PID 78 Rear Rear Axle Temperature,
Check” page 21.
FMI 4
Abnormally low voltage or short-circuit to lower voltage.
Conditions for fault code:
•
If the instrument cluster registers a voltage of less
than 0.5 V the instrument cluster interprets this as a
fault and a fault code is stored.
Possible cause:
•
Signal cable short-circuited to ground.
•
Faulty sensor.
Reaction from the instrument cluster:
•
fault code is stored.
•
Yellow lamp requested.
Noticeable external symptoms:
•
Yellow lamp lights up.
•
The display shows an icon and the text ”NO DATA”.
Appropriate check:
•
“MID 140 PID 78 Rear Rear Axle Temperature,
Check” page 21.
20
