DTC B1317/B1318 [ADVANCED KEYLESS SYSTEM]

id0902e1350700

DTC

B1317

Keyless control module power supply voltage increases (16.1 V or more)

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

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 FUSE BLOCK
• Measure the fuse block terminal voltage.
• Is the voltage 9 V-16 V?
Yes
Install the fuse, then go to the next step.
No
Repair the wiring harness between the fuse block and battery.
4
INSPECT FUSE BLOCK
• Measure the voltage at the fuse block terminal voltage.
• Is the voltage 9 V-16 V?
Yes
Go to the next step.
No
Repair the wiring harness between the fuse block and battery.
5
INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Measure the keyless control module terminal 3B 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.
No
Repair the wiring harness between the BCM and keyless control module.