1.3.2.1.7.7. Engine compartment CAN test
1.3.2.1.7.7. No further information available.
1.3.2.1.8. Check power supply at control unit N71 (Headlamp range adjustment control module).
If the fault code is not current, it may be deleted. In this case, the battery voltage was too low over an extended period.Charge the battery, if
necessary.Question:Is there a current undervoltage fault is several control modules?Note:This fault could result in consequential faults. You should
therefore process this fault first and then erase the fault memory.
YES
Possible cause and remedy
- Battery voltage too low.Test battery.Charge battery, replace if necessary.
- If fault occurs again:Check alternator.Communication with ECU required
- The quiescent current is too high.Test quiescent current.
NO
Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Front SAM control unit with fuse and relay module)Test
prerequisite
- The relevant actual value is not okay.
- Battery voltage is OK.
- Fuse N10/1f51 (Fuse 51) is OK.
Test sequence
- Switch off ignition.
- Disconnect connector at component N71 (Headlamp range adjustment control module).
- Measure direct voltage with multimeter between sockets (N71) 20 and (N71) 19
- Switch on ignition.
Specified value:Voltage = [11.0...14.5] VQuestion
- Is the measurement value OK?
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