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

id09021g802400

DTC B1317 | Keyless control module power supply voltage increases (16.1 V or more)
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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
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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.