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ECH-134 < DTC/CIRCUIT DIAGNOSIS > [HRA2DDT] B1900 DC/DC CONVERTER B1900 DC/DC CONVERTER DTC Logic INFOID:0000000010500813 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE-1 1. Turn ignition switch ON and wait at least 3 seconds. 2. Check DTC. Is DTC detected? YES >> Proceed to ECH-134, "Diagnosis Procedure" NO >> GO TO 3. 3. PERFORM DTC CONFIRMATION PROCEDURE-2 With CONSULT 1. Start the engine and warm it up to normal operating temperature. 2. Press start/stop OFF switch and check that the switch indicator is ON. 3. Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT. 4. Touch “START” and operate stop/start system. (engine stop.) 5. Touch “CANCEL” and restart the engine. 6. Check DTC. Without CONSULT 1. Activate stop/start system. Refer to ECH-33, "STOP/START SYSTEM : System Description" . CAUTION: Always drive vehicle at a safe speed. 2. Restart the engine. 3. Check DTC. Is DTC detected? YES >> Proceed to ECH-134, "Diagnosis Procedure" NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010500814 1. CHECK FUSE 1. Turn ignition switch OFF. 2. Check that the following fuse is not fusing. Is the fuse fusing? YES >> Replace the fuse after repairing the applicable circuit. DTC CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause B1900 DC/DC CONVERTER DC/DC converter detects power supply • Harness and connectors (DC/DC converter power supply input 1 cir- • DC/DC converter Fuse No. Capacity F/L-O 30 A |