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EC9-168 < DTC/CIRCUIT DIAGNOSIS > [R9M] U0298 DC/DC CONVERTER U0298 DC/DC CONVERTER DTC Logic INFOID:0000000010309056 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 EC9-39, "STOP/START SYSTEM : System Description (M/T models)" EC9-47, "STOP/START SYSTEM : System Description (CVT models)" (CVT models). CAUTION: Always drive vehicle at a safe speed. 2. Restart the engine. 3. Check DTC. Is DTC detected? YES >> Proceed to EC9-168, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010309057 1. CHECK VOLTAGE STABILIZER SIGNAL 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, and then check the voltage between DC/DC converter harness DTC CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause U0298 — During the restart, the DC/DC converter • Harness and connectors (Voltage stabilizer signal line is open or cir- • DC/DC converter |