Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

Step	Inspection		Action
1	VERIFICATION BEFORE SERVICING Are any DTCs, except the following, displayed? U0010 88 16:Er12	Yes	Determine the open circuit location referring to DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM]
1		No	Go to the next step
2	INSPECTION OF CONTROL MODULE CONNECTOR OUTPUTTING DTCs Inspect the terminal condition of the control module connector outputting DTCs and the mid-connector Are the connector terminals normal without damage, deformation, corrosion, or disconnection?	Yes	Go to the next step
2		No	Repair or replace the connector, then go to Step 9
3	INSPECTION OF POWER SUPPLY OF CONTROL MODULE OUTPUTTING DTCs Refer to the terminal voltage table of the control module outputting DTCs to inspect the terminal voltage and fuse condition Is the power supply voltage normal?	Yes	Go to the next step
3		No	Repair or replace the connector, then go to Step 9
4	INSPECTION OF BODY GROUND CONDITION OF CONTROL MODULE OUTPUTTING DTCs Inspect the body ground wires and ground point of the control module outputting DTCs Are the ground and ground point normal?	Yes	Go to the next step
4		No	Repair or replace the connector, then go to Step 9
5	CAN SYSTEM RELATED WIRING HARNESS INSPECTION CAN system related wiring harness inspection Short to ground Short to power supply Short between twisted pair wiring harness Open circuit Is the wiring harness normal?	Yes	Go to the next step
5		No	Repair or replace the connector, then go to Step 9
6	INSPECT INSTRUMENT CLUSTER Disconnect the instrument cluster connector Measure the resistance between the following instrument cluster connector terminals Between terminal 2T and terminal 2S (part side) Is the resistance 118-130 ohm?	Yes	Go to the next step
6		No	Replace the instrument cluster, then go to Step 9 (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION )
7	INSPECT INFORMATION DISPLAY Disconnect the information display connector Measure the resistance between the following information display connector terminals Between terminal J and terminal L (part side) Is the resistance 118-130 ohm?	Yes	Go to the next step
7		No	Replace the information display, then go to Step 9 (See INFORMATION DISPLAY REMOVAL/INSTALLATION .)
8	CAN RELATED MODULE VERIFICATION Remove only one of the CAN-related modules Clear DTCs Inspect the DTCs of all modules Are DTCs U0010 88, 16 Er12 displayed?	Yes	Reinstall the removed module, remove another module and perform the same inspection Inspect all of the CAN-related modules using the same procedure After inspecting all of the modules, go to the next step
8		No	Replace the removed module
9	AFTER REPAIR VERIFICATION Connect all of the modules Clear DTCs. Inspect the DTCs. Are DTCs displayed?	Yes	Perform the CAN system on-board diagnosis again according to the troubleshooting procedure (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .)
9		No	DTC troubleshooting completed