Mazda Mazda6 - Page 854

T–42
ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION
A6E816255430204
System Wiring Diagram
PCM
1. Check the display of DTC U0101, U0121 and/or U0155, using the SST (WDS or equivalent). (See T–41 DTC
TABLE.)
2. Referring to the following table, determine the malfunctioning part of the CAN system.
2WD
X: Normal
—: Communication error
PCM
WIRING
HARNESS A
TWIST PAIR
WIRING
HARNESS B
WIRING
HARNESS C
INSTRUMENT
CLUSTER
ABS (ABS/TCS)
HU/CM
OR
DSC HU/CM
TCM
4WD
CONTROL
MODULE
WIRING
HARNESS E
WIRING
HARNESS G
WIRING
HARNESS D
WIRING
HARNESS F
PCM
WIRING
HARNESS A
INSTRUMENT
CLUSTER
ABS (ABS/TCS)
HU/CM
OR
DSC HU/CM
WIRING
HARNESS C
WIRING
HARNESS B
2WD
4WD
A6E81621102
Module
Communication status
Malfunction location
ABS (ABS/TCS) HU/CM
DSC HU/CM
Instrument cluster
PCM
——
• Wiring harness A
• PCM
— X
• Wiring harness B
• ABS (ABS/TCS) HU/CM
• DSC HU/CM
X —
• Wiring harness C
• Instrument cluster