DTC B1317/B1318 [ADVANCED KEYLESS ENTRY AND START SYSTEM]SM2445805
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)
POSSIBLE CAUSE
• When the keyless control module power supply voltage is not within 9―16 V
POSSIBLE CAUSE
• ROOM 15 A fuse malfunction
• Battery malfunction
• Open or short circuit in wiring harness between battery and keyless control module
• Keyless control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FUSE
• Remove the ROOM 15 A 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
• Inspect the wiring harnesses between the battery and keyless control module connector terminal 2A for the following:
― Short to ground
― Short to power supply
― Open circuit
• Is the wiring harness normal?
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
DTC troubleshooting completed.