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2008 - MX-5 - Body and Accessories

DTC U0030/U0031 [POWER RETRACTABLE HARDTOP]



DTC

U0030

Power window communication error (during power retractable hardtop operation)

U0031

Power window communication error (during power retractable hardtop not operation)

DETECTION CONDITION

  • U0030: Open notify signal cannot be received.

  • U0031: Open notify signal is received continuously for 30 s or more.

POSSIBLE CAUSE

  • Open or short circuit in wiring harness between power retractable hardtop control module and power window main switch

  • Power retractable hardtop control module malfunction

  • Power window main switch malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT POWER WINDOW SYSTEM

Yes

Go to the next step.

No

Replace the power window main switch, then go to next step.

2

INSPECT WIRING HARNESS BETWEEN POWER RETRACTABLE HARDTOP CONTROL MODULE AND POWER WINDOW MAIN SWITCH
  • Turn the ignition switch to the LOCK position.

  • Disconnect the negative battery cable.

  • Disconnect the power retractable hardtop control module and power window main switch connector.

  • Inspect for continuity between power retractable hardtop control module connector terminal 1E and power window main switch terminal 1A, and between power retractable hardtop control module connector terminal 1C and power window main switch terminal 1H

  • Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness.

3

INSPECT POWER RETRACTABLE HARDTOP CNTROL MODULE
  • Connect the negative battery cable.

  • Clear the DTC from the power retractable hardtop control module memory using the M-MDS.

  • Turn the ignition switch to the ON position.

  • Operate the power retractable hardtop.

  • Is the DTC displayed?

    • U0030 or U0031

Yes

Replace the power retractable hardtop control module.

(See POWER RETRACTABLE HARDTOP CONTROL MODULE REMOVAL/INSTALLATION.)

No

DTC troubleshooting completed.




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