ON-BOARD DIAGNOSTIC SYSTEM (IMMOBILIZER SYSTEM) MALFUNCTION DIAGNOSIS FUNCTION [KEYLESS ENTRY SYSTEM]SM1935394
ON-BOARD DIAGNOSTIC SYSTEM (IMMOBILIZER SYSTEM) MALFUNCTION DIAGNOSIS FUNCTION [KEYLESS ENTRY SYSTEM]

id0914b3102100

• The immobilizer system is provided with a malfunction diagnosis function.
• Malfunction diagnosis of the immobilizer system occurs automatically when the start knob 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 indicates 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 indicates a DTC. If the security light itself has a malfunction, it is possible that a DTC may not be indicated properly. There are certain DTCs which can only be verified using the Mazda Modular Diagnostic System (M-MDS), not the security light.
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 indicated by the security light. The PCM and instrument cluster store multiple DTCs at the same time.
• If two or more immobilizer system DTCs are verified, first repair the part of the DTC indicated by the security light. 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 indicating the DTC, the security light illuminates or flashes in the following patterns:

Security light flashing pattern

(Before indicating a DTC)

DTC
11, 12, 13, 14, 15, 16
21, 22, 23

DTC

Detection condition

Security light flashing pattern

M-MDS display

Instrument cluster

PCM
11
B10D9:67
P1260:00
No detected communication with the coil
12
B10D5:13
P1260:00
• Coil antenna malfunction
• The PCM determined a malfunction in the coil antenna even though it is normal.
13
B10D7:05
P1260:00
The key ID number data cannot be read.
B10D7:94
P1260:00
Key ID number registration error
14
B10D7:81
P1260:00
The instrument cluster cannot read key ID number data normally.
15
B10D7:51
P1260:00
The instrument cluster has detected unregistered key ID number.
16
U0100:87
P1260:00
Communication error between the instrument cluster and the PCM (no response)
21
B10D8:00
P1260:00
Only one key ID number is registered.
22
B10DA:51
P1260:00
Communication error between the instrument cluster and the PCM (data transfer error)
23
B10DA:62
P1260:00
ID number data in the PCM and the instrument cluster do not match.
Not illuminated
U3000:41
-
Instrument cluster malfunction