ON-BOARD DIAGNOSTIC SYSTEM (IMMOBILIZER SYSTEM) MALFUNCTION DIAGNOSIS FUNCTION[ADVANCED KEYLESS SYSTEM]

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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 LOCK (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 LOCK (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 LOCK to the ON position and perform immobilizer system malfunction diagnosis.

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

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

Keyless control module

PCM

11

B1681

P1260

Signal communication with the coil cannot be detected.

12

B2103

P1260

Coil malfunction

13

B1600

P1260

The key ID number data cannot be read.

B2431

P1260

Key ID number registration error

14

B1602

P1260

The keyless control module cannot read key ID number data normally.

15

B1601

P1260

Unregistered key detected.

16

U2510

P1260

Communication error between the keyless control module and the PCM (no response)

U1147

P1260

Communication error between the keyless control module and the PCM (mismatched conditions)

21

B1213

P1260

Only one key is registered.

22

B2141

P1260

Communication error between the keyless control module and the PCM (data transfer error)

23

B2139

P1260

PCM ID number data mismatch

Not illuminated

B1342

-

Keyless control module malfunction

DTC			Detected condition
Security light flashing pattern	mazda modular diagnostic system (M-MDS) display
Security light flashing pattern	Keyless control module	PCM
11	B1681	P1260	Signal communication with the coil cannot be detected.
12	B2103	P1260	Coil malfunction
13	B1600	P1260	The key ID number data cannot be read.
13	B2431	P1260	Key ID number registration error
14	B1602	P1260	The keyless control module cannot read key ID number data normally.
15	B1601	P1260	Unregistered key detected.
16	U2510	P1260	Communication error between the keyless control module and the PCM (no response)
16	U1147	P1260	Communication error between the keyless control module and the PCM (mismatched conditions)
21	B1213	P1260	Only one key is registered.
22	B2141	P1260	Communication error between the keyless control module and the PCM (data transfer error)
23	B2139	P1260	PCM ID number data mismatch
Not illuminated	B1342	-	Keyless control module malfunction