MM. Checking Signal From Hood Switch

MMA. Fault Tracing

Condition
No diagnostic trouble codes (DTCs) stored.

Possible Source
Short-circuit to ground in hood switch signal cable.
Faulty hood switch.

Start fault-tracing with MMB.


MMB1. Checking Signal From Hood Switch





Ignition on.
[1][2]Hood open.
Go into scrolling values.
Read off the hood switch status.
The value should be HIGH when the [1][2]hood is open.
Is the value HIGH?
Yes: Fault not found
No: Go to MMB2.


MMB2. Checking For A Short-Circuit To Ground





Check cable between VGLA control module #A3 and hood switch terminal 1 for a short-circuit to ground according to WWA3 WW. Checking Wiring and Connections
Were any faults found in the cable?
Yes: Go to MMB4.
No: Go to MMB3.


MMB3. Replacing Component
Replace hood switch according to service and repair procedure. Then continue with MMB4.


MMB4. Verification






Hint: After carrying out the repair check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on.
[1][2]Hood open.
Go into scrolling values.
Read off the hood switch status.
The value should be HIGH when the [1][2]hood is open.
Is the value HIGH?
Yes: Fault corrected
No: Fault not found