Check Code Inspection

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Check Code Inspection

Check code 01 

INSPECTION REFERENCE

Check code 01 CAN system
DISPLAY ACTION
OK CAN system of information display is normal.
U2516 CAN system communication error. (DTC U2516)
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)

Check code 02 

INSPECTION REFERENCE

Check code 02
  • Communication status to audio unit
  • Communication status to climate control unit
  • Communication status to instrument cluster
DISPLAY ACTION
02 OK Communication to all unit (audio unit, climate control unit, instrument cluster) is normal.
Audio unit OK ACU Communication to audio unit is normal.
U0184 ACU Communication error to audio unit. (DTC U0184)
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)
None EATC Vehicle without audio unit.
Climate control unit OK EATC Communication to climate control unit is normal.
U0164 EATC Communication error to climate control unit. (DTC U0164)
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)
None EATC Vehicle without climate control unit.
Instrument cluster OK HEC Communication to instrument cluster is normal.
U0181 HEC Communication error to instrument cluster. (DTC U0181)
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)

Check code 04 

INSPECTION REFERENCE

Check code 04 TNS relay ON/OFF signal
STEP INSPECTION CONDITION DISPLAY ACTION
1 Turn the headlight switch to the TNS position. (TNS relay ON) ON Go to the next step.
OFF Verify that the voltage of information display terminal C is B+  .
  • If the voltage is as specified, replace the information display.
  • If the voltage is not as specified, inspect the following parts:
    • TNS relay
    • Wiring harness (Battery-TNS relay-information display)
2 Turn the headlight switch off. (TNS relay OFF) ON Verify that the voltage of the information display terminal C is 1.0 V or less. 
  • If the voltage is as specified, replace the information display.
  • If the voltage is not as specified, inspect the following parts:
    • TNS relay
    • Wiring harness (TNS relay-information display)
OFF Input signal to the information display is normal.

Check code 09 

INSPECTION REFERENCE

Check code 09 Clock switch signal
STEP INSPECTION CONDITION DISPLAY ACTION
1 Do not operate the clock switch. 227
|
255
Go to the next step.
Except above Go to Step 5.
2 Press the H switch, and hold. 070
|
084
Go to the next step.
Except above Go to Step 5.
3 Press the M switch, and hold. 102
|
117
Go to the next step.
Except above Go to Step 5.
4 Press the:00 switch, and hold. 000
|
003
Clock switch is normal.
Except above Go to the next step.
5 Inspect the clock switch.
  • If there is any malfunction, repair or replace the wiring harness or connector.
  • If there is no malfunction, replace the information display.

All segments illuminated 

SEGMENTS REFERENCE

- LCD
DISPLAY ACTION
G06762667Courtesy of MAZDA MOTORS CORP.
All segments and dots illuminated. LCD is normal.
Except above Replace the information display.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.