MKS AWD V6-3.7L (2009)
Compass: Pinpoint Tests
Pinpoint Test A: The Compass Is Inoperative
Electronic Compass
Pinpoint Tests
Pinpoint Test A: The Compass Is Inoperative
Refer to Wiring Diagram Set 124, Power Mirrors for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By Number
NOTE: This procedure is only applicable to vehicles without navigation. For vehicles with navigation, refer to Radio, Stereo, and Compact Disc.
Normal Operation
The compass display (located in the Front Display Interface Module (FDIM)) receives battery voltage from the Smart Junction Box (SJB) fuse 14 (10A)
through circuit SBP14 (BN/RD). Ground for the FDIM is supplied through circuit GD114 (BK/BU). The compass module (integral to the auto-dimming
interior mirror) provides vehicle directional inputs over circuits VMC31 (GY/BU) and VMC30 (BU/GY) to the Instrument Cluster (IC), which sends the
compass information to the FDIM over the Medium Speed Controller Area Network (MS-CAN). The FDIM displays the compass direction according to
the information that has been provided by the compass module to the IC.
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DTC U0161:00 (Lost Communication With Compass Module: No Sub Type Information) - sets when the IC does not receive any communication
from the compass module for 5 seconds or longer.
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DTC U0462:00 (Invalid Data Received From Compass Module: No Sub Type Information) - sets when the IC attempts a self-test of the compass
module and its associated circuits and a failure results.
This pinpoint test is intended to diagnose the following:
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Fuse(s)
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Wiring, terminals or connectors
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Compass module (integral to the auto-dimming interior mirror)
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FDIM (compass display)
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IC
PINPOINT TEST A: THE COMPASS IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Always set the zone and calibrate the compass before replacing an inaccurate compass module.
NOTE: After installing a new compass module, always set the zone and calibrate the compass.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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A1 CHECK THE COMPASS DISPLAY
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Ignition ON.
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Check the compass display in the lower left corner of the FDIM.
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Does the compass display illuminate?
Yes
If the compass display illuminates with only 2 bars, GO to A2.
If the compass display turns on, but it does not display all directions, or indicates CAL, Go To Pinpoint Test b. See: Pinpoint Test B: The Compass Is
Inaccurate
No
REFER to Radio, Stereo, and Compact Disc.