Mazda Mazda6 Workshop Manual Supplement page 859

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
STEP
5 INSPECT INSTRUMENT CLUSTER
CONNECTOR
• Disconnect negative battery cable.
• Disconnect instrument cluster connector.
• Are poor connection detection bars of
instrument cluster connector okay?
• Is vehicle equipped with DSC?
6
7 INSPECT WIRING HARNESS BETWEEN DSC
HU/CM AND INSTRUMENT CLUSTER
• Disconnect DSC HU/CM connector.
• Inspect the following wiring harness between
DSC HU/CM and instrument cluster
terminals for short to ground, short power
supply, and open circuit:
— AF—2W (CAN_L)
— AG—2X (CAN_H)
• Is wiring harness okay?
8 INSPECT WIRING HARNESS BETWEEN ABS
(ABS/TCS) HU/CM AND INSTRUMENT
CLUSTER
• Disconnect ABS (ABS/TCS) HU/CM
connector.
• Inspect the following wiring harness between
ABS (ABS/TCS) HU/CM and instrument
cluster terminals for short to ground, short
power supply, and open circuit:
— R—2W (CAN_L)
— O—2X (CAN_H)
• Is wiring harness okay?
9 INSPECT ABS (ABS/TCS) HU/CM OR DSC
HU/CM CONNECTOR
• Disconnect negative battery cable.
• Disconnect ABS (ABS/TCS) HU/CM or DSC
HU/CM connector.
• Is the connector for the ABS (ABS/TCS) HU/
CM or DSC HU/CM connected correctly?
• Is vehicle equipped with DSC?
10
11 INSPECT WIRING HARNESS BETWEEN DSC
HU/CM AND INSTRUMENT CLUSTER
• Disconnect DSC HU/CM connector.
• Inspect the following wiring harness between
DSC HU/CM and instrument cluster
terminals for short to ground, short power
supply, and open circuit:
— AF—2W (CAN_L)
— AG—2X (CAN_H)
• Is wiring harness okay?
12 INSPECT WIRING HARNESS BETWEEN ABS
(ABS/TCS) HU/CM AND INSTRUMENT
CLUSTER
• Disconnect ABS (ABS/TCS) HU/CM
connector.
• Inspect the following wiring harness between
ABS (ABS/TCS) HU/CM and instrument
cluster terminals for short to ground, short
power supply, and open circuit:
— R—2W (CAN_L)
— O—2X (CAN_H)
• Is wiring harness okay?
13 INSPECT PCM CONNECTOR
• Disconnect negative battery cable.
• Disconnect TCM connector.
• Is the connector for the TCM connected
correctly?
INSPECTION
Yes Go to next step.
No Replace wiring harness.
Yes Go to next step.
No Go to step 8.
Yes Replace instrument cluster, then go to Step 17.
No Replace wiring harness.
Yes Replace instrument cluster, then go to Step 17.
No Replace wiring harness.
Yes Go to next step.
No Replace wiring harness.
Yes Go to next step.
No Go to step 12.
Yes Replace DSC HU/CM, then go to Step 17.
No Replace wiring harness.
Yes Replace ABS (ABS/TCS) HU/CM, then go to Step 17.
No Replace wiring harness.
Yes Go to next step.
No Replace wiring harness.
ACTION
T–47
T