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

Step

Inspection

Action

1

• Remove the ROOM 15 A fuse.

• Is the fuse normal?

Yes

Go to the next step.

No

Replace the fuse.

2

• 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

• 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

• 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

• 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.

(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 [ADVANCED KEYLESS SYSTEM])

No

Repair the wiring harness between the BCM and keyless control module.