Mazda CX-7 2007 Workshop Manual page 1352

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
Instrument Cluster
1. Inspect the display of DTC U0100, U0101, U0114, U0121, U0140, U0151 and/or U0214 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
PCM
—
—
—
×
—
×
Instrument
cluster —
×
—
×
—
×
×
Note
• There is no DTC in the instrument cluster that determines signal quality between it and the information
display. Due to this, determine the malfunction location using the DTC on the information display.
3. Inspect the display of DTC U0164 using the M-MDS. (See 09-02D-7 DTC TABLE[MULTIPLEX
COMMUNICATION SYSTEM].)
4. Referring to the following table, determine the malfunctioning part of the CAN system.
Module
Climate control unit
Instrument
cluster
09-02D–12
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Communication status
AWD
DSC HU/
TCM control
CM
module
— — —
× × ×
× ×
—
× ×
—
×
— —
× ×
—
— — —
× ×
—
— — —
× × ×
— — —
× × ×
× × ×
Communication status
Information display
—
—
×
SAS Keyless
control BCM control
module module
— — —
× × ×
× × ×
× × ×
× × ×
× × ×
× × ×
× × ×
× ×
—
× ×
—
×
— —
× ×
—
× ×
—
• Wiring harness N
—
• Instrument cluster
• Wiring harness O
×
• Climate control unit
• Wiring harness Q
• Wiring harness S
—
• Information display
×: Normal
— : Communication error
Malfunction location
• Wiring harness M
• Instrument cluster
• Wiring harness A
• PCM
• Wiring harness C
• Wiring harness B
• TCM
• Wiring harness E
• BCM
• Wiring harness F
• Wiring harness D
• DSC HU/CM
• Wiring harness H
• Wiring harness G
• AWD control module
• Wiring harness J
• BCM
• Wiring harness I
• SAS control module
• Wiring harness K
• BCM
• BCM
• Wiring harness L
• Keyless control module
×: Normal
— : Communication error
Malfunction location