ON-BOARD DIAGNOSIS SYSTEM (IMMOBILIZER SYSTEM) MALFUNCTION DIAGNOSIS FUNCTION

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• The immobilizer system is provided with a malfunction diagnosis function.
• Malfunction diagnosis of the immobilizer system occurs automatically when the ignition switch is turned from the OFF (ACC) to the ON (START) position.
• If the results of the malfunction diagnosis show a malfunction in the immobilizer system, the security light displays a DTC. At the same time, DTCs are stored in the PCM and keyless control module. The stored DTCs can be verified using the Mazda Modular Diagnostic System (M-MDS).

  Caution
  • Always use the Mazda Modular Diagnostic System (M-MDS) to verify DTCs even if the security light display a DTC. If the security light itself has a malfunction, it is possible that a DTC may not be properly displayed. There are certain DTCs which can only be verified using the Mazda Modular Diagnostic System (M-MDS), not the security light.
  • DTCs for the immobilizer system that are stored in the keyless control module and PCM are cleared when the ignition switch is turned from the ON to the OFF (ACC) position.

  Note
  • If two or more malfunctions are detected as a result of malfunction diagnosis, only the DTC with the lowest number of those detected will be displayed by the security light. However, multiple DTCs are stored at the same time.
  • If two or more immobilizer system DTCs are verified, first repair the part indicated by the security light displayed DTC. After completely repairing one location, turn the ignition switch from the OFF to the ON position and perform immobilizer system malfunction diagnosis.

Advanced Keyless Entry And Start System

DTC table

  Note
  • In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security light will illuminate or flash the following patterns:

  Security light flashing pattern (Before displaying DTC) | DTC
  --- | ---
  | 11, 12, 13, 14, 15, 16
  | 21, 22, 23

DTC | Detected condition
--- | ---
Security light flashing pattern | Mazda Modular Diagnostic System (M-MDS) display*1
Keyless control module | PCM*2 | PCM*3
11 |  | B1681 | P1260 | P1260:00 | No detected communication with the coil antenna.
12 |  | B2103 | P1260 | P1260:00 | Coil antenna malfunction
13 |  | B1600 | P1260 | P1260:00 | The key ID number data cannot be read.
B2431 | P1260 | P1260:00 | Key ID number registration error.
14 |  | B1602 | P1260 | P1260:00 | The keyless control module cannot read key ID number data normally.
15 |  | B1601 | P1260 | P1260:00 | The keyless control module has detected unregistered key ID number.
16 |  | U2510 | P1260 | P1260:00 | Communication error between the keyless control module and the PCM (mismatched conditions)
21 |  | B1213 | P1260 | P1260:00 | Only one key ID number is registered.
22 |  | B2141 | P1260 | P1260:00 | Communication error between the keyless control module and the PCM (data transfer error)
23 |  | B2139 | P1260 | P1260:00 | ID number data in the PCM and the keyless control module do not match.
Not illuminated | B1342 | - | - | Keyless control module malfunction

*1 :The letters at the beginning of each DTC are only displayed when using the M-MDS, and refer to the following: B= Body system, P= Powertrain system, U= Network communication system.
*2 :PCM connector (2 types)
*3 :PCM connector (3 types)

Keyless Entry System

DTC table

  Note
  • In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security light will illuminate or flash the following patterns:

  Security light flashing pattern (Before displaying DTC) | DTC
  --- | ---
  | 11, 12, 13, 14, 15, 16
  | 21, 22, 23

DTC | Detected condition
--- | ---
Security light flashing pattern | Mazda Modular Diagnostic System (M-MDS) display*1
Instrument cluster | PCM*2 | PCM*3
11 |  | B1681 | P1260 | P1260:00 | No detected communication with the coil antenna.
12 |  | B2103 | P1260 | P1260:00 | Coil antenna malfunction
13 |  | B1600 | P1260 | P1260:00 | The key ID number data cannot be read.
B2431 | P1260 | P1260:00 | Key ID number registration error.
14 |  | B1602 | P1260 | P1260:00 | The keyless control module cannot read key ID number data normally.
15 |  | B1601 | P1260 | P1260:00 | The keyless control module has detected unregistered key ID number.
16 |  | U2510 | P1260 | P1260:00 | Communication error between the keyless control module and the PCM (mismatched conditions)
21 |  | B1213 | P1260 | P1260:00 | Only one key ID number is registered.
22 |  | B2141 | P1260 | P1260:00 | Communication error between the keyless control module and the PCM (data transfer error)
23 |  | B2139 | P1260 | P1260:00 | ID number data in the PCM and the keyless control module do not match.
Not illuminated | B1342 | - | - | Instrument cluster malfunction

*1 :The letters at the beginning of each DTC are only displayed when using the M-MDS, and refer to the following: B= Body system, P= Powertrain system, U= Network communication system.
*2 :PCM connector (2 types)
*3 :PCM connector (3 types)