Home

< Previous   Next >

2008 - MX-5 - Body and Accessories

DTC B1317/B1318 [ADVANCED KEYLESS SYSTEM]



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.

(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.




< Previous   Next >
Back to Top
© 2009 Mazda North American Operations, U.S.A.