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2008 - MX-5 - Body and Accessories

SECURITY LIGHT 13, DTC -/B1600/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]



DTC

Security light flashing pattern

13

ID number is not received

M-MDS display

Keyless control module

-

Instrument cluster

B1600

PCM

P1260

POSSIBLE CAUSE

  • No transponder in the key

  • Defective transponder in the key (ID number is not output.)

  • Defective coil antenna

  • Defective instrument cluster


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY DTC USING M-MDS
  • Does M-MDS indicate DTC B1600?

Yes

Go to Step 3.

No

Go to next step.

2

VERIFY DTC USING M-MDS
  • Does M-MDS indicate DTC B2431?

Yes

Go to SECURITY LIGHT 13, DTC -/B2431/P1260.

(See SECURITY LIGHT 13, DTC -/B2431/P1260 [IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)].)

No

Go to next step.

3

VERIFY VALID KEY
  • Is there any key, other than the one that caused displayed DTC, which can start the engine?

Yes

Go to Step 5.

No

Go to next step.

4

VERIFY WHETHER MALFUNCTION IS IN COIL ANTENNA OR KEY

Yes

Replace coil antenna, then go to step 6.

(See COIL ANTENNA REMOVAL/INSTALLATION [ADVANCED KEYLESS SYSTEM])

No

5

VERIFY WHETHER MALFUNCTION IS IN COIL ANTENNA OR KEY
  • Using any other valid key, turn ignition switch to ON position.

  • Does M-MDS indicate DTC -/B1600/P1260 again?

Yes

Replace coil antenna, then go to next step.

(See COIL ANTENNA REMOVAL/INSTALLATION [ADVANCED KEYLESS SYSTEM])

No

6

INSPECT KEYLESS CONTROL MODULE
  • Using registered key, turn ignition switch to ON position.

  • Does M-MDS indicate DTC -/B1600/P1260 again?

Yes

Replace keyless control module, then go to next step.

(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS SYSTEM])

No

DTC troubleshooting completed.

7

INSPECT INSTRUMENT CLUSTER
  • Using registered key, turn ignition switch to ON position.

  • Does M-MDS indicate DTC -/B1600/P1260 again?

Yes

Replace instrument cluster and reprogram immobilizer system.

(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM])

No

DTC troubleshooting completed.




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