Mazda CX-7 2007 Workshop Manual page 1348

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION[MULTIPLEX COMMUNICATION
SYSTEM]
System Wiring Diagram
WIRING
HARNESS C
WIRING
HARNESS A
PCM
WIRING
HARNESS B
TCM
WIRING
HARNESS N
INSTRUMENT
CLUSTER
WIRING
HARNESS P
PCM
1. Inspect the display of DTC U0101, U0121 and/or U0155, using the M-MDS.
(See 09-02D-7 DTC TABLE[MULTIPLEX COMMUNICATION SYSTEM].)
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Module
TCM
—
—
×
×
PCM
×
09-02D–8
WIRING
DSC HU/CM
HARNESS D
WIRING
BCM
HARNESS H
WIRING
HARNESS F
WIRING
AWD
HARNESS E
CONTROL
MODULE
CLIMATE
WIRING
CONTROL
HARNESS O
UNIT
WIRING
HARNESS R
WIRING
HARNESS Q
CAR-NAVIGATION
UNIT OR
AUDIO UNIT
(BASE MODULE)
Communication status
DSC HU/CM
—
×
—
—
×
SAS
WIRING
CONTROL
HARNESS I
MODULE
BCM
WIRING
HARNESS J
WIRING
WIRING HARNESS K
HARNESS G
AUDIO
WIRING
AMPLIFIER
HARNESS S
: FRONT HARNESS
: INSTRUMENT PANEL HARNESS
: EMISSION HARNESS
: REAR HARNESS
Instrument cluster
—
×
×
—
—
id0902e6830500
KEYLESS
CONTROL
WIRING
MODULE
HARNESS L
INSTRUMENT
CLUSTER
WIRING
HARNESS M
INFORMATION
DISPLAY
acxuuw00002225
×: Normal
— : Communication error
Malfunction location
• Wiring harness A
• PCM
• Wiring harness B
• TCM
• Wiring harness D
• DSC HU/CM
• Wiring harness C
• Wiring harness E
• BCM
• Wiring harness F
• Wiring harness H
• Wiring harness J
• Wiring harness K
• Wiring harness M
• Instrument cluster