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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 380 (On-Board Diagnostic (Multiplex Communication System)) >> DTC U0073, U2516 >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0073, U2516 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT CAN SYSTEM-RELATED DTC 
  • Are any DTCs other than the following displayed?
    • U0073
    • U2516
 Yes Determine malfunctioning part in CAN system.
(See PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION  )
No Go to the next step.
2 INSPECT CONNECTOR 
  • Inspect the connector of the module that outputs the DTC.
  • Is it normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 4.
3 INSPECT WIRING HARNESSES 
  • Inspect for the following malfunctioning wiring harnesses:
    • Short to GND
    • Short to power supply
    • Twisted pair short each other
    • Open circuit
  • Is there any malfunction?
 Yes Replace the wiring harness, then go to the next step.
No Go to the next step.
4 VERIFY TROUBLESHOOTING COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC using the WDS or equivalent.
  • Perform KOEO/KOER self-test.
  • Is the same DTC present?
 Yes Replace the module that outputs the DTC, then retry this step.
No Troubleshooting completed.
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