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Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC B2170 DIAGNOSTIC PROCEDURE TABLE

STEP INSPECTION ACTION
1 INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY 
  • Disconnect keyless control module connector and steering lock unit connector.
  • Is there continuity between keyless control module terminal 3N and steering lock unit terminal A?
 Yes Replace the steering lock unit and perform the resetting procedure for the steering lock unit.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .)
(See STEERING LOCK UNIT ID CODE REGISTRATION[ADVANCED KEYLESS SYSTEM] .)
No Repair the wiring harness between the steering lock unit and keyless control module.
2 INSPECT KEYLESS CONTROL MODULE 
  • Turn the ignition switch to the ON position.
  • Is the DTC displayed?
    • M-MDS: B2170
 Yes Replace the keyless control module and perform the resetting procedure for the advanced keyless system when replacing the keyless control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM] .)
(See CARD KEY ID CODE REGISTRATION[ADVANCED KEYLESS SYSTEM] .)
(See STEERING LOCK UNIT ID CODE REGISTRATION[ADVANCED KEYLESS SYSTEM] .)
(See KEYLESS CONTROL MODULE CONFIGULATION[ADVANCED KEYLESS SYSTEM] .)
(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING[ADVANCED KEYLESS SYSTEM] .)
(See SECURITY ACCESS PROCEDURE[ADVANCED KEYLESS SYSTEM] .)
No DTC troubleshooting completed.
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