Mazda CX-7 2007 Workshop Manual page 1422

SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]
STEP
• Turn the ignition switch to LOCK position.
4
• Remove the instrument cluster.
• Disconnect the instrument cluster connector.
• Inspect the voltage between instrument
cluster wiring harness-side connector
terminal 2G and terminal 2C.
• Turn the ignition switch to the ON position.
• Is the voltage B+?
2W 2U 2S 2Q 2O
2X 2V 2T 2R 2P
• Turn the ignition switch off.
5
• Inspect the instrument cluster connector
terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).
• Are the terminals normal?
End Of Sie
NO. 3 ABS WARNING LIGHT ILLUMINATES[INSTRUMENT CLUSTER]
3 ABS warning light illuminates
• DSC HU/CM malfunction
• Instrument cluster malfunction
• Connector or pin malfunction
POSSIBLE
• Short circuit in wiring harness between CAN-L, CAN-H and GND
CAUSE
• Open circuit in CAN wiring harness (CAN-L, CAN-H)
• CAN wiring harness (CAN-L, CAN-H) short each other
Diagnostic procedure
STEP
• Start the engine.
1
• Does the ABS warning light turn off?
• Inspect the DTC for the instrument cluster
2
ON-BOARD DIAGNOSTIC SYSTEM.
• Has DTC U2064 been recorded in memory?
• Disconnect the negative battery cable.
3
• Measure the resistance between the DLC-2
terminals F and E.
• Is the resistance 54— 66 ohms?
• Inspect the DLC-2 terminals F and E for
4
short to power supply or GND.
• Is there any malfunction?
• Turn the ignition switch off.
5
• Inspect the instrument cluster connector
terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).
• Are the terminals normal?
• Disconnect the negative battery cable.
6
• Measure the resistance between the
instrument cluster connector terminals 2R
and 2T.
• Is the resistance 114— 126 ohms?
2W 2U 2S 2Q 2O
2X 2V 2T 2R 2P
09-03C–4
INSPECTION
2M 2K 2I 2G 2E 2C 2A
2N 2L 2J 2H 2F 2D 2B
INSPECTION
2M 2K 2I 2G 2E 2C 2A
2N 2L 2J 2H 2F 2D 2B
Yes Go to the next step.
No Inspect the suspect wiring harness, then repair or replace.
Yes Replace the instrument cluster.
No Repair or replace the terminal.
Yes Troubleshooting completed.
No Go to the next step.
Yes Inspect the DTC for the DSC HU/CM.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
No Go to the next step.
Yes Go to the next step.
No Go to Step 5.
Yes Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.
No Replace the instrument cluster.
Yes Go to the next step.
No Repair or replace the terminal.
Yes Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.
No Replace the instrument cluster.
ACTION
id0903d5807600
ACTION