Mazda Mazda6 - Page 858

T–46
ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
Diagnostic procedure
STEP INSPECTION ACTION
1 Is inspected vehicle 2WD? Yes Go to next step.
No Go to Step 18.
2 DETERMINING THE LOCATION OF A
MALFUNCTION
• Determine the malfunctioning part of the
CAN system.
(See T–42 PROCEDURES FOR
DETERMINING THE LOCATION OF A
MALFUNCTION)
• Is the malfunctioning part the wiring harness
C or the instrument cluster?
Yes Go to Step 5.
No Go to next step.
3 DETERMINING THE LOCATION OF A
MALFUNCTION
• Is the malfunctioning part the wiring harness
B or the ABS (ABS/TCS) HU/CM? (with ABS
(ABS/TCS))
• Is the malfunctioning part the wiring harness
B or the DSC HU/CM? (with DSC)
Yes Go to Step 9.
No Go to next step.
4 DETERMINING THE LOCATION OF A
MALFUNCTION
• Is the malfunctioning part the wiring harness
A or the PCM?
Yes Go to Step 13.
No Go to next step.
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