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P3136-914, P3136-915, P3136-916 HBC-553 < COMPONENT DIAGNOSIS > D E F G H I J K L M A B HBC N O P P3136-914, P3136-915, P3136-916 Description INFOID:0000000004212139 The hybrid vehicle control ECU monitors the connection status of the air bag diagnosis sensor unit (ACU) (communication) line. If the ECU detects a malfunction, it will alert the driver. DTC Logic INFOID:0000000004212140 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 10 seconds. 2. Check DTC. YES >> Go to HBC-553, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000004212141 1. PRECONDITIONING • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. • After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. • Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. >> GO TO 2. 2. CHECK DTC FOR ACU 1. Turn ignition switch ON. 2. Check DTC for ACU. Refer to SRC-14, "CONSULT-III Function (AIR BAG)" . Is DTC detected? YES >> Go to diagnosis procedure relevant to output DTC. NO >> GO TO 3. DTC No. INF code Trouble diagnosis name DTC detecting condition Possible cause P3136 914 ACU communication circuit The pulse signal sent from ACU is not • ACU communication line 915 ACU communication circuit low An excessively low voltage from ACU • ACU communication line 916 ACU communication circuit high An excessively high voltage from ACU • ACU communication line |