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2008 - MX-5 - Body and Accessories

DTC U0073, U2516 [MULTIPLEX COMMUNICATION SYSTEM]



DTC

U0073

  • PCM

  • TCM

  • DSC HU/CM

  • ABS HU/CM

  • Power retractable hardtop control module

  • Keyless control module

  • Instrument cluster

CAN system communication error

U2516

Steering angle sensor

DETECTION CONDITION

WARNING:

  • Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only detection conditions may cause injury due to operating error, or damage the system. When performing an inspection, always follow the inspection procedure.

  • CAN system related harness malfunction

  • Related module communication error

POSSIBLE CAUSE

  • Open or short circuit in wiring harness

  • Malfunction of connectors between PCM, TCM, DSC HU/CM, ABS HU/CM, power retractable hardtop control module, keyless control module, steering angle sensor and instrument cluster

  • PCM malfunction

  • TCM malfunction

  • DSC HU/CM malfunction

  • ABS HU/CM malfunction

  • Power retractable hardtop control module malfunction

  • Keyless control module malfunction

  • Steering angle sensor malfunction

  • Instrument cluster malfunction


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 [MULTIPLEX COMMUNICATION SYSTEM])

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 malfunctions in the following wiring harnesses:

    • Short to GND

    • Short to power supply

    • Twisted pair short each other

    • Open circuit

  • Is there any malfunction?

Yes

Repair or 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 M-MDS.

  • Is the same DTC present?

Yes

Replace the module that outputs the DTC, then retry this step.

No

Troubleshooting completed.




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