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EXL-56 < DTC/CIRCUIT DIAGNOSIS > [XENON TYPE] B2521 ECU CIRCUIT B2521 ECU CIRCUIT Description INFOID:0000000005244711 AFS control unit judges the vehicle condition from each signal. AFS control unit controls AFS function and the DTC Logic INFOID:0000000005244712 DTC DETECTION LOGIC [B2521] ECU circuit DTC CONFIRMATION PROCEDURE 1. DTC ERASE Erase the DTC memory of AFS with CONSULT-III. >> GO TO 2. 2. DTC CONFIRMATION PROCEDURE 1. Turn the ignition ON. 2. Select the self-diagnosis with CONSULT-III. 3. Check the self-diagnosis result. Refer to Is “B2521” detected? YES >> Refer to . NO >> Refer to GI-36, "Intermittent Incident" . Diagnosis Procedure INFOID:0000000005244713 1. CHECK EACH SENSOR POWER SUPPLY 1. Turn the ignition switch ON. 2. Check the voltage between the AFS control unit harness connector and the ground. Is the measurement value within the standard value? YES >> GO TO 2. Less than the standard value >>GO TO 3. Error detection condition DTC erase condition Possible cause • AFS control unit indicates an applicable DTC when de- tecting any of the following conditions continuously for 2 - The swivel position sensor is shorted to the power supply or the ground. - The swivel position sensor signal is shorted to the ground. - The height sensor power supply is shorted to the power supply or the ground. - The height sensor signal is shorted to the ground. Ignition switch OFF Swivel position sensor Terminals Voltage (Approx.) (+) ( − ) AFS control unit Ground Connector Terminal M16 4 5 V 6 24 |