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 U0214 DIAGNOSTIC PROCEDURE TABLE

STEP	INSPECTION		ACTION
1	INSPECT WIRING HARNESS BETWEEN KEYLESS RECEIVER AND GROUND Disconnect keyless receiver connector. Is there continuity between keyless receiver terminal E and ground?	Yes	Go to next step.
1		No	Repair the wiring harness between the keyless receiver and ground. Go to next step.
2	INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY Disconnect keyless control module connector and keyless receiver connector. Inspect the continuity between the following connector terminals. keyless control module: 3S-keyless receiver: A keyless control module: 3U-keyless receiver: C Is there continuity?	Yes	Go to next step.
2		No	Repair the wiring harness between the keyless receiver and keyless control module. Go to next step.
3	INSPECT KEYLESS RECEIVER POWER SUPPLY CIRCUIT Turn ignition switch to ON position. Measure voltage at terminal 3S of keyless control module connector. Is voltage more than 7.5 V ?	Yes	Replace keyless receiver. (See KEYLESS RECEIVER REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM] .)
3		No	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] .)