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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 476 (SYMPTOM TROUBLESHOOTING (IMMOBILIZER SYSTEM))NO.1 SECURITY LIGHT DISPLAY IS NOT NORMALDIAGNOSTIC PROCEDURE
2010 Mazda 5 Sport, 2.3 L, Standard

Diagnostic Procedure

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
SECURITY LIGHT DISPLAY IS NOT NORMAL DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1
  • Turn the ignition switch to the ON position.
  • Do other warning lights in the instrument cluster illuminate normally?
 Yes Go to the next step.
No Inspect the instrument cluster.
(See INSTRUMENT CLUSTER INSPECTION .)
2
  • Turn the ignition switch to the LOCK position.
  • Disconnect the negative battery cable.
  • Disconnect the instrument cluster connector (24-pin).
  • Connect the negative battery cable.
  • Does the security light illuminate?
 Yes Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
No Go to the next step.
3
  • Disconnect the negative battery cable.
  • Ground instrument cluster terminal 2F using a jumper wire.
  • Connect the negative battery cable.
  • Does the security light illuminate?
 Yes Go to the next step.
No Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
4
  • Disconnect the negative battery cable.
  • Disconnect the instrument cluster connector.
  • Connect the keyless control module connector.
  • Connect the negative battery cable.
  • Turn the ignition switch to the ON position.
  • Does the security light illuminate?
 Yes Replace the keyless control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION .)
No Repair the wiring harness.
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.