Verifying DTCs Using Security Indicator Light (Immobilizer System)

NOTE:

If multiple DTCs are detected, only those having the lowest numbers of those detected will be indicated by the security indicator light.
A DTC is displayed 10 times by switching the ignition ON (engine off or on) once.

Switch the ignition ON (engine off or on).

Wait for approx. 1 min until the security indicator light displays a DTC.

NOTE:

In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security indicator light turns on, flashes, or turns off in the following patterns:

Security indicator light flash pattern (before displaying DTC)	DTC
ILLUMINATED NOT ILLUMINATED	09, 11, 13, 15, 16
ILLUMINATED NOT ILLUMINATED	21
ILLUMINATED NOT ILLUMINATED	22, 23

Read DTCs by the number of times the security indicator light flashes as shown in the figure.

Fig 1: Security Indicator Light Flashes Timing Pattern
Courtesy of MAZDA MOTORS CORP.
Repair the malfunctioning part according to the applicable DTC troubleshooting based on the DTC which was verified by the number of times the security indicator light flashed. (Refer to DTC TABLE [START STOP UNIT] .)