Group 87 Climate Control, Fault Codes
Troubleshooting
8730-21-02-11
MID 146 SID 22 Pressure Sensor Refrigerant High Pressure Side,
Check
Special tools: 9998534
Other special equipment: J-39200
NOTE
•
Check all relevant connectors. Check for loose
connections, contact resistance and oxidation. For a
more detailed description of fault-tracing wiring
and connectors, see separate service information
under Group 371.
Measurement at the component
connector to the control unit
Note: If one of the values below is incorrect this may also
have caused the component to fail, check the component
if any of the values are incorrect.
Supply cable
1
Conditions:
•
Ignition key in the drive position.
•
Measurement to the control unit.
•
Control unit connected.
•
Measuring voltage using the J-39200 Digital
Multimeter.
Measurement points
Nominal value
BSB18 - BSB3
V
≈
4.5 - 5.5 V
J-39200
9990025
, 9998699
Signal cable
2
Conditions:
•
Ignition key in the drive position.
•
Measurement to the control unit.
•
Control unit connected.
•
Measuring voltage using the J-39200 Digital
Multimeter.
Measurement points
Nominal value
BSB6 - BSB3
V
≈
0.5 - 4.5 V
J-39200
9990025
, 9998699
38