DTC B1317/B1318 [ADVANCED KEYLESS SYSTEM]


DTC	B1317	Keyless control module power supply voltage increases (16.1 V or more)
DTC	B1318	Keyless control module power supply voltage decreases (less than 9 V)
DETECTION CONDITION		• When the keyless control module power supply voltage is not within 9-16 V.
POSSIBLE CAUSE		• Open or short circuit in wiring harness between battery and keyless control module • Battery malfunction • Keyless control module malfunction


Step	Inspection		Action
1	INSPECT FUSE • Remove the ROOM 15 A fuse. • Is the fuse normal?	Yes	Go to the next step.
1		No	Replace the fuse.
2	INSPECT BATTERY • Measure the battery positive voltage. • Is the voltage 9 V-16 V?	Yes	Go to the next step.
2		No	The battery has a malfunction. Inspect the charge/discharge system.
3	INSPECT WIRING HARNESS BETWEEN BATTERY AND KEYLESS CONTROL MODULE • Turn the ignition switch to the ON position. • Measure the keyless control module terminal 2A voltage. • Is the voltage 9 V-16 V?	Yes	Replace the keyless control module and perform the resetting procedure for the advanced keyless system when replacing the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS SYSTEM].) (See CARD KEY ID CODE REGISTRATION [ADVANCED KEYLESS SYSTEM]) (See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS SYSTEM]) (See KEYLESS CONTROL MODULE CONFIGURATION [ADVANCED KEYLESS SYSTEM]) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM]) (See SECURITY ACCESS PROCEDURE)
3		No	Repair the wiring harness between the battery and keyless control module.