Mazda CX-7 2007 Workshop Manual page 1351

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
SAS Control Module
1. Inspect the display of DTC 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
SAS control module
Keyless Control Module
1. Inspect the display of DTC U0100, U0140, U0323 and/or U2023 using the M-MDS.
(See 09-02D-7 DTC TABLE[MULTIPLEX COMMUNICATION SYSTEM].)
Caution
• DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-
MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).
Note
• You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC
Service Function" > "Freeze Frame Data".This function is supported on IDS, not PDS.
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Module
PCM
Keyless control
module
Revised 12/2006 (Ref. No. R215/06)
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Communication status
Instrument cluster
—
Communication status
BCM
— —
×
—
— —
×
—
× ×
Malfunction location
• SAS control module
• Wiring harness I
• Wiring harness J
• BCM
• Wiring harness K
• Wiring harness M
• Instrument cluster
Instrument cluster
• Wiring harness L
—
• Keyless control module
• Wiring harness A
• Wiring harness C
• Wiring harness E
• BCM
×
• Wiring harness F
• Wiring harness H
• Wiring harness J
• PCM
• Wiring harness K
×
• BCM
× • BCM
• Wiring harness M
—
• Instrument cluster
×: Normal
— : Communication error
×: Normal
— : Communication error
Malfunction location
09-02D–11
09-02D