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Immobilizer System

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.
DTC DESCRIPTION (START STOP UNIT)

DTC KEY warning light (red)(2) Multi-information display(3) Push button start indicator light (amber) Description Fail-safe Drive cycle Self test type(4) Memory function Service Information
M-MDS display(1)        
Start stop unit   PCM
U3000:96 P1260:00 09
G11432357
On Display Flash Start stop unit malfunction - - C x (See SECURITY INDICATOR LIGHT: 09, DTC: U3000:96/P1260:00 [START STOP UNIT] .)
B10D9:87 P1260:00 11
G11432358
- - Flash Coil antenna (built into push button start) error - - C - (See SECURITY INDICATOR LIGHT: 11, DTC: B10D9:87/P1260:00 [START STOP UNIT] .)
B13D3:05 P1260:00 13
G11432359
- - - Remote transmitter program error - - C - (See SECURITY INDICATOR LIGHT: 13, DTC: B13D3:05/P1260:00 [START STOP UNIT] .)
B13D3:94 P1260:00 13   - - - Communication error with remote transmitter - - C - (See SECURITY INDICATOR LIGHT: 13, DTC: B13D3:94/P1260:00 [START STOP UNIT] .)
B13D3:51 P1260:00 15
G11432360
- - Flash Unregistered remote transmitter is detected - - C - (See SECURITY INDICATOR LIGHT: 15, DTC: B13D3:51/P1260:00 [START STOP UNIT] .)
U0100:87 P1260:00 16
G11432361
- - - Communication error with PCM (no response or data mis-match) - - C - (See SECURITY INDICATOR LIGHT: 16, DTC: U0100:87/P1260:00 [START STOP UNIT] .)
B13D4:00 P1260:00 21
G11432362
On Display - Insufficient remote transmitter programming number - - C - (See SECURITY INDICATOR LIGHT: 21, DTC: B13D4:00/P1260:00 [START STOP UNIT] .)
B10DA:51 P1260:00 22
G11432363
- - - Communication error with PCM (data received failure) - - C - (See SECURITY INDICATOR LIGHT: 22, DTC: B10DA:51/P1260:00 [START STOP UNIT] .)
B10DA:62 P1260:00 23
G11432364
- - - Communication error with PCM (code mis-matched) - - C - (See SECURITY INDICATOR LIGHT: 23, DTC: B10DA:62/P1260:00 [START STOP UNIT] .)
(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) Without multi-information display
(3) "Keyless system malfunction" is displayed in the multi-information display. (With multi-information display)
(4) C: CMDTC self test, D: ODDTC self test