B3000 V6-3.0L (2007)
Step 27
Chart 1
Chart 2
Normal Operation
The PCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits (W/L) (HS-CAN +) and (W) (HS-CAN
-) provide the network connection to the PCM. The PCM shares the HS-CAN with the four wheel drive (4WD) control module, the restraints control
module (RCM), the occupant classification sensor module, the smart junction box (SJB), and the instrument cluster. Circuits (V/W) and (GY/R) provide
voltage, and redundant circuit (B/V) provides ground.
Possible Causes
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Fuse
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Circuit (V/W) open
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Circuit (GY/R) open
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Circuit (B/V) open
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CAN data plus circuit (W/L) open, short to ground, or short to voltage
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CAN data minus circuit (W) open, short to ground, or short to voltage
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CAN data plus circuit (W/L) and CAN data minus circuit (W) shorted together
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DLC D-01
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PCM
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RCM
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Occupant classification sensor module
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Instrument cluster
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SJB