DTC B1317/B1318 [ADVANCED KEYLESS ENTRY AND START SYSTEM]

id09021g802400

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
•  When the keyless control module power supply voltage is not within 9—16 V
•  Open or short circuit in wiring harness between battery and keyless control module
•  Battery malfunction
•  Keyless control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FUSE
•  Remove the ROOM fuse.
•  Is the fuse normal?
Yes
Go to the next step.
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.
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 ENTRY AND START SYSTEM].)
No
Repair the wiring harness between keyless control module and battery.