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Mazda 6 Service Manual: Procedures for determining the location of a malfunction

Mazda 6 Service Manual / Body electrical system / On-board diagnostic [multiplex communication system] / Procedures for determining the location of a malfunction

System Wiring Diadram


PCM

1. Check the display of DTC U0121 and/or U0155, using the SST

(WDS or equivalent). (See DTC TABLE.)

2. Referring to the following table, determine the malfunctioning part of the CAN system.


ABS/TCS HU/CM or DSC HU/CM

1. Accec and monitor the PCM MSG and IC MSGof PID using the SST

(WDS or equivalent).

2. Referring to the PID/DATA MONITOR, confirm the display status of the PID. (See PID/DATA MONITOR TABLE.)

3. Referring to the following table, determine the malfunctioning part of the CAN system.


Instrument Cluster

1. Accec and monitor the PCM MSG and ABS MSG of PID using the SST

(WDS or equivalent).

2. Referring to the PID/DATA MONITOR, confirm the display status of the PID. (See PID/DATA MONITOR TABLE.)

3. Referring to the following table, determine the malfunctioning part of the CAN system.


Pid/data monitor table
...

Dtc u0073, u1900, u2516
Diagnostic procedure ...

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