Mazda Mazda6 - Page 710

M–80
ON-BOARD DIAGNOSTIC
End Of Sie
DTC U0100
A6E637027100205
Diagnostic Procedure
• Inspect according to the diagnostic procedure in Section T. (See T–39 MULTIPLEX COMMUNICATION
SYSTEM.)
End Of Sie
DTC U0101
A6E637027100206
Diagnostic Procedure
• Inspect according to the diagnostic procedure in Section T. (See T–39 MULTIPLEX COMMUNICATION
SYSTEM.)
End Of Sie
DTC U0121
A6E637027100207
Diagnostic Procedure
• Inspect according to the diagnostic procedure in Section T. (See T–39 MULTIPLEX COMMUNICATION
SYSTEM.)
End Of Si e
4 INSPECT 4WD CM TO DIFFERENTIAL OIL
TEMPERATURE SENSOR FOR SHORT TO
GROUND
• Inspect for continuity between 4WD CM
terminal A and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground between 4WD
CM and differential oil temperature sensor, then go to Step
7.
No Go to next step.
5 INSPECT 4WD CM TO DIFFERENTIAL OIL
TEMPERATURE SENSOR FOR OPEN
CIRCUIT
• Inspect for continuity between 4WD CM
terminal C and differential oil temperature
sensor terminal B.
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between 4WD CM
and differential oil temperature sensor, then go to Step 7.
6 INSPECT 4WD CM TO DIFFERENTIAL OIL
TEMPERATURE SENSOR FOR SHORT TO
GROUND
• Inspect for continuity between 4WD CM
terminal C and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground between 4WD
CM and differential oil temperature sensor, then go to next
step.
No Replace 4WD CM, then go to next step.
7 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory.
(See M–76 Clearing DTCs Procedures)
• Drive vehicle.
• Is the same DTC present?
Yes Replace 4WD CM, then go to next step.
No Go to next step.
8 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC U0100 PCM communication
DETECTION
CONDITION
• 4WD CM detects that communication signals (throttle opening angle and engine speed signals) from
PCM are abnormal.
POSSIBLE
CAUSE
• PCM signals have communication error.
DTC U0101 TCM communication
DETECTION
CONDITION
• 4WD CM detects that communication signals (selector lever position and gear position signals) from
TCM are abnormal.
POSSIBLE
CAUSE
• TCM signals have communication error.
DTC U0121 ABS/DSC communication
DETECTION
CONDITION
• 4WD CM detects that communication signals (four-wheel speed, ABS/DSC operation condition, and
coupling torque request signals) from DSC HU/CM are abnormal.
POSSIBLE
CAUSE
• DSC HU/CM signals have communication error.