Mazda 6 Service Manual: 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.
Dtc u0073, u1900, u2516
Diagnostic procedure
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Other materials:
Mazda 6 Service Manual: Interior
Front
Rear
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Mazda 6 Service Manual: Clock spring inspection
1. Remove the clock spring.
2. Inspect for continuity between the clock spring terminals using an
ohmmeter.
If not as specified, replace the clock spring.
Note
When the vehicle-side connector of clock spring is disconnected,
the terminals 1A,1B, 1C and 1D are shorted to prevent ...