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ECK-172 < DTC/CIRCUIT DIAGNOSIS > [K9K] B1902 DC/DC CONVERTER B1902 DC/DC CONVERTER DTC Logic INFOID:0000000010289734 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 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 ECK-39, "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 ECK-172, "Diagnosis Procedure" NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010289735 1. CHECK DC/DC CONVERTER POWER SUPPLY OUTPUT 1 1. Turn ignition switch ON. 2. Check the voltage between fuse and ground. PG-56, "Wiring Diagram - IGNITION POWER SUPPLY -" Is the inspection result normal? YES >> GO TO 2. DTC CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause B1902 DC/DC CONVERTER DC/DC converter detects power supply • Harness and connectors (DC/DC converter power supply output 1 • DC/DC converter output 1 + – Voltage Fuse No. 71 Ground Battery voltage 72 73 74 |