Edge AWD V6-3.5L (2009)
DISCONNECTED
-
Disconnect: Audio DSP Module C4348a.
-
Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness
side.
-
Are the resistances greater than 1,000 ohms?
Yes
CONNECT the negative battery cable. GO to U46.
No
GO to U31.
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U31-U53
Communications Network
Pinpoint Tests
Pinpoint Test U: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Normal Operation
The Medium Speed Controller Area Network (MS-CAN) uses an unshielded twisted pair cable. Circuits VDB06 (GY/OG) and VDB07 (VT/OG)
provide the network connection to all modules on the network.
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
-
Data Link Connector (DLC)
-
Accessory Protocol Interface Module (APIM) (if equipped)
-
Audio Control Module (ACM)
-
Audio Digital Signal Processing (DSP) module (if equipped)
-
Dual Climate Controlled Seat Module (DCSM) (if equipped)
-
Driver Seat Module (DSM) (if equipped)
-
HVAC module (if equipped)
-
Instrument Cluster (IC)
-
Liftgate/Trunk Module (LTM) (if equipped)
-
Parking Aid Module (PAM) (if equipped)
-
Satellite Digital Audio Receiver System (SDARS) module (if equipped)
-
Smart Junction Box (SJB)
PINPOINT TEST U: NO MS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint
test. See: Initial Inspection and Diagnostic Overview/Communications Network/Inspection and Verification
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
