Group 87 Climate Control, Fault Codes
Troubleshooting
8730-21-02-05
MID 146 SID 12 Water Control Valve, Check
Special tools: 9990025, 9998699, 9998596
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.
Ground lead
1
Conditions:
•
Measuring voltage using the J-39200 Digital
Multimeter.
•
Ignition key in the drive position.
•
Measurement to the control unit.
•
Control unit connected.
•
Heater control in max heat / max cool position
Measurement points
Nominal value
BSB15 - ground
V
≈
B+ (max heat)
V
≈
0 V (max cool)
J-39200
9998699
, 9990025
22
