Mazda Mazda6 - Page 857

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
T–45
T
2WD
X: Normal
—: Communication error
4WD
X: Normal
—: Communication error
End Of Sie
DTC U0073, U1900, U2516
A6E816255430205
Module
Communication status
Malfunction location
PCM
ABS (ABS/TCS) HU/CM
DSC HU/CM
Instrument cluster
——
• Wiring harness C
• Instrument cluster
— X
• Wiring harness A
• PCM
X —
• Wiring harness B
• ABS (ABS/TCS) HU/CM
• DSC HU/CM
Module
Communication status
Malfunction location
PCM TCM
ABS (ABS/TCS)
HU/CM
DSC HU/CM
4WD control
module
Instrument
cluster
————
• Wiring harness G
• Instrument cluster
— XXX
• Wiring harness A
• PCM
X — XX
• Wiring harness B
• TCM
XX— X
• Wiring harness D
• ABS (ABS/TCS)
HU/CM
• DSC HU/CM
XXX—
• Wiring harness F
• 4WD control
module
—— XX• Wiring harness C
——— X • Wiring harness E
DTC
U0073
CAN system communication error
U1900
U2516 CAN system wiring harness open and short circuit
DETECTION
CONDITION
Warning
• Detection conditions are for understanding DTC outline before performing inspection.
Performing inspection with only detection conditions may cause injury due to operating error
or damage the system. When performing inspection, always follow inspection procedure.
• CAN system related harness malfunction
• Related module communication error
POSSIBLE
CAUSE
• Open or short circuit in wiring harness
• Malfunction of connectors between PCM, TCM, ABS (ABS/TCS) HU/CM or DSC HU/CM, 4WD control
module and Instrument cluster
• PCM malfunction
• TCM malfunction
• ABS (ABS/TCS) HU/CM malfunction (with ABS (ABS/TCS))
• DSC HU/CM malfunction (with DSC)
• 4WD control module malfunction
• Instrument cluster malfunction