Ford ST2834-A - CHECK THE COMPASS SIGNAL CIRCUIT FOR AN OPEN OR SHORT TO GROUND

PINPOINT TEST A: THE COMPASS IS INOPERATIVE (Continued)
A5 CHECK THE COMPASS SIGNAL CIRCUITS FOR A SHORT TO VOLTAGE (Continued)
(Continued)
Option Content Positive Meter Lead Negative Meter
Lead
C9039-9
VMC31 (GY/BU)
Ground
• Is any voltage present?
A6
CHECK THE COMPASS SIGNAL CIRCUIT FOR AN OPEN OR SHORT TO GROUND
• Ignition OFF.
• Measure the resistance between the auto-dimming interior mirror,
harness side and the IPC, harness side; and between the auto-
dimming interior mirror, harness side and ground as follows:
Option Content Positive Meter Lead Negative Meter
Lead
Without camera
mirror, without SYNC
C911-6
VMC31 (GY/BU)
C220-10
VMC31 (GY/BU),
then ground
Without camera
mirror, with SYNC
C9012-6
VMC31 (GY/BU)
C220-10
VMC31 (GY/BU),
then ground
With camera mirror C9039-9
VMC31 (GY/BU)
C220-10
VMC31 (GY/BU),
then ground
Yes
GO to A7.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the
self-test.
419-11-7
Electronic Compass 419-11-7
DIAGNOSIS AND TESTING (Continued)
2011 Mustang, 2/2011