mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 9690 > < Initial Inspection and Diagnostic Overview|Page 9688
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Is any voltage present?

Yes

REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No

GO to A16.

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A16 CHECK THE COMPASS (+) COMMUNICATION CIRCUIT FOR AN OPEN OR SHORT TO GROUND (VEHICLES WITH VIDEO
MIRROR)

 

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Ignition OFF.

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Disconnect: Auto-Dimming Interior Mirror C9039.

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Disconnect: IPC C220.

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For non-Hybrid vehicles, measure the resistance between the auto-dimming interior mirror C9039-9, circuit VMC31 (GY/BU), harness side and
the IPC C220-24, circuit VMC31 (GY/BU), harness side; and between the auto-dimming interior mirror C9039-9, circuit

VMC31 (GY/BU), harness side and ground.

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For Hybrid vehicles, measure the resistance between the auto-dimming interior mirror C9039-9, circuit VMC31 (GY/BU), harness side and the
IPC C220-16, circuit VMC31 (GY/BU), harness side; and between the auto-dimming interior mirror C9039-9, circuit

VMC31 (GY/BU), harness side and ground.

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Is the resistance less than 5 ohms between the auto-dimming interior mirror and the IPC, and greater than 10,000 ohms between the
auto-dimming interior mirror and ground?

Yes

GO to A17.

No

Initial Inspection and Diagnostic Overview|Page 9690 > < Initial Inspection and Diagnostic Overview|Page 9688