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ECH-142 < DTC/CIRCUIT DIAGNOSIS > [HRA2DDT] B1904 DC/DC CONVERTER B1904 DC/DC CONVERTER DTC Logic INFOID:0000000010500821 DTC DETECTION LOGIC NOTE: or . 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 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. (Stop the engine.) 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-142, "Diagnosis Procedure" NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010500822 1. INSPECTION START 1. Turn ignition switch ON. 2. Erase DTC. 3. Perform DTC Confirmation Procedure. Refer to . 4. Check DTC. Is the DTC B1904 displayed again? YES >> Replace DC/DC converter. Refer to ECH-314, "Removal and Installation" NO >> INSPECTION END DTC CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause B1904 DC/DC CONVERTER DC/DC converter function is malfunctioning. DC/DC converter |