ON-BOARD DIAGNOSIS SYSTEM [START STOP UNIT]

id091400006335

Outline

Function

―  A malfunction detection function, which detects overall malfunctions in the start stop unit-related parts.

―  A memory function, which stores detected DTCs.

―  A display function, which indicates malfunction locations and status via DTC output.

―  A PID/data monitoring function, which reads out specific input/output signals and verifies the input/output condition.

Malfunction detection function

DTC table

Immobilizer System

DTC				Multi-information display*2	Push button start indicator light (amber)	Description	Fail-safe	Drive cycle	Self test type*3	Memory function
Mazda Modular Diagnostic System (M-MDS) display*1		Security indicator light flash pattern
Start stop unit	PCM
U3000:96	P1260:00	09		Display	Flash	Start stop unit malfunction	—	—	C	×
B10D9:87	P1260:00	11		—	Flash	Coil antenna (built into push button start) error	—	—	C	—
B13D3:05	P1260:00	13		—	—	Remote transmitter program error	—	—	C	—
B13D3:94	P1260:00	13		—	—	Communication error with remote transmitter	—	—	C	—
B13D3:51	P1260:00	15		—	Flash	Unregistered remote transmitter is detected	—	—	C	—
U0100:87	P1260:00	16		—	—	Communication error with PCM (no response or data mis-match)	—	—	C	—
B13D4:00	P1260:00	21		Display	—	Insufficient remote transmitter programming number	—	—	C	—
B10DA:51	P1260:00	22		—	—	Communication error with PCM (data received failure)	—	—	C	—
B10DA:62	P1260:00	23		—	—	Communication error with PCM (code mis-matched)	—	—	C	—

Advanced Keyless Entry System (With Advanced Keyless Entry System)

Start Stop Unit

DTC 7-digit code definition

•  When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the store data using scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

ac5uun00003031

Status byte for DTC

•  The two digits (two digits after hyphen (-)) after the 7-digit DTC.

ac5uun00003050

Detection condition for the applicable DTC

Immobilizer System

DTC No.	Description	Detection condition
U3000:96	Start stop unit malfunction	•  Start stop unit malfunction detected.
B10D9:87	Coil antenna (built into push button start) error	•  Start stop unit detected a malfunction in the coil antenna, and remote transmitter communication is not possible.
B13D3:05	Remote transmitter program error	•  Start stop unit detects a remote transmitter program error.
B13D3:94	Communication error with remote transmitter	•  Start stop unit could not detect the remote transmitter communication or communication error was detected.
B13D3:51	Unregistered remote transmitter is detected	•  Start stop unit detects that the remote transmitter has not been programmed.
U0100:87	Communication error with PCM (no response or data mis-match)	•  Start stop unit detects a communication error (no response or immobilizer system cancel not possible) with the PCM.
B13D4:00	Insufficient remote transmitter programming number	•  Start stop unit detects that the number of programmed remote transmitters is less than 2.
B10DA:51	Communication error with PCM (data received failure)	•  Start stop unit detects a communication error (data received failure) with PCM.
B10DA:62	Communication error with PCM (code mis-matched)	•  Start stop unit detects a communication error (code mis-matched) with the PCM.

Advanced Keyless Entry System (With Advanced Keyless Entry System)

DTC No.	Description	Detection condition
B10C6:1F	Keyless antenna (exterior, rear) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (exterior, rear) circuit with the ignition switched off.
B10C7:1F	Keyless antenna (interior, rear) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (interior, rear) circuit with the ignition switched off.
B10C8:1F	Keyless antenna (interior, center) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (interior, center) circuit with the ignition switched off.
B10C9:1F	Keyless antenna (interior, front) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (interior, front) circuit with the ignition switched off.
B10D1:23	Request switch (LF) circuit malfunction	•  Start stop unit detected any of the following conditions at a vehicle speed of 5 km/h {3 mph} or more. ―  The request switch (LF) is continuously ON for 2 min or more. ―  The request switch (LF) was ON 7 times.
B10D3:23	Request switch (RF) circuit malfunction	•  Start stop unit detected any of the following conditions at a vehicle speed of 5 km/h {3 mph} or more. ―  The request switch (RF) is continuously ON for 2 min or more. ―  The request switch (RF) was ON 7 times.
B11C4:23	Request switch (liftgate) circuit malfunction	•  Start stop unit detected any of the following conditions at a vehicle speed of 5 km/h {3 mph} or more. ―  The request switch (liftgate) is continuously ON for 2 min or more. ―  The request switch (liftgate) was ON 7 times.
B11FD:1F	Keyless antenna (exterior, LF) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (exterior, LF) circuit with the ignition switched off.
B1210:1F	Keyless antenna (exterior, RF) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (exterior, RF) circuit with the ignition switched off.
B13C3:04	LF control unit internal malfunction	•  Start stop unit detects the LF control unit internal malfunction.
B13C3:09	LF control unit malfunction	•  When any of the following conditions is met: ―  Start stop unit detects that the LF state signal of the LF control unit is low for 5 s or more. ―  With the communication between the start stop unit and LF control unit being performed normally, there is no response from the LF control unit even though there is the signal transmission request from the start stop unit to the LF control unit, and the LF state signal does not become low.
B13C3:16	LF control unit power supply voltage low input	•  Start stop unit power supply circuit voltage of 8.5 V or more or less than 16.5 V and LF control unit power supply circuit voltage of 5 V or more or less than 8.5 V are detected for 5 s or more.
B13C3:29	Communication error between start stop unit and LF control unit	•  Start stop unit detects the communication error with the LF control unit 10 times.

Start Stop Unit

DTC No.	Description	Detection condition
B1026:49	Steering lock malfunction	•  Start stop unit detects a serious malfunction in the steering lock of the internal start stop unit.
B1026:96	Steering lock malfunction	•  Start stop unit detects the start stop unit internal malfunction.
B108B:23	Push button start switch 1 circuit malfunction	•  Start stop unit detects that the push button start switch 1 is stuck on for 120 s or more.
B108B:24	Push button start switch 1 circuit malfunction	•  Start stop unit detects that the push button start switch 1 is kept in an off condition 5 times or more even though the push button start switch 2 is on.
B108C:23	Push button start switch 2 circuit malfunction	•  Start stop unit detects the push button start switch 2 is stuck on for 120 s or more.
B108C:24	Push button start switch 2 circuit malfunction	•  Start stop unit detects that the push button start switch 2 is kept in an off condition 5 times or more even though the push button start switch 1 is on.
B10AC:13	Cruise control switch circuit malfunction	•  Start stop unit detected an open circuit in the cruise control switch circuit for 5 s or more with the ignition switched ON (engine off or on).
B10AC:23	Cruise control switch circuit malfunction	•  Start stop unit detects any cruise control switch stuck on for 120 s or more with the ignition switched ON (engine off or on).
B10C9:1F*1	Keyless antenna (interior, center) circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the keyless antenna (interior, center) with the ignition switched off.
B10E7:11	IG1 relay circuit malfunction	•  Start stop unit detects the voltage from the IG1 relay output monitor as less than 2.5 V for 0.5 s or more while the engine is not being cranked with the ignition switched ON (engine off or on).
B10E7:12	IG1 relay circuit malfunction	•  Start stop unit detects the IG1 relay output monitor voltage of 2.5 V or more for 0.5 s or more with the ignition switched off or ACC.
B10E7:16	IG1 relay circuit malfunction	•  Start stop unit detects the IG1 monitor voltage of less than 2.5 V for 1 s or more while the engine is not being cranked with the ignition switched ON (engine off or on).
B10E7:17	IG1 relay circuit malfunction	•  Start stop unit detects the IG1 monitor voltage of 2.5 V or more for 1 s or more with the ignition switched off or ACC.
B112A:11	IG2 relay circuit malfunction	•  Start stop unit detects the IG2 relay output monitor voltage of 2.5 V or less for 0.5 s or more with the ignition switched ON (engine off or on).
B112A:12	IG2 relay circuit malfunction	•  Start stop unit detects the IG2 relay output monitor voltage of 2.5 V or more for 0.5 s or more with the ignition switched off or to ACC
B1140:29	i-stop control error signal received	•  Start stop unit detects that the starter ground circuit does not turn on or open circuit on even though the PCM detects an engine restart request while the engine is stopped under i-stop control for 2 s or more for a total of 5 times or more.
B124C:56	Turn switch internal circuit malfunction	•  Start stop unit detects that the turn switch LH and RH are turned on simultaneously for 5 s or more.
B13D3:16	Low remote transmitter battery voltage	•  Start stop unit detects the low remote transmitter battery voltage in any of the programmed transmitters 3 times continuously.
B13D3:4A	Remote transmitter matching malfunction	•  Start stop unit detects a remote transmitter different from the one equipped to the vehicle.
B13D3:97	Remote transmitter registration work not completed	•  Start stop unit detects that the registration of a remote transmitter has not been completed.
B1C53:13	Wiper switch circuit malfunction	•  Start stop unit detects an open circuit, short to ground, or short to power supply in the wiper switch circuit for 5 s or more with the ignition switched ON (engine off or on).
C0040:23	Brake switch (No.1 signal) circuit malfunction	•  The start stop unit detected the following condition 5 times continuously with the ignition switched ON (engine off or on). ―  The brake switch (No.1 signal) is OFF for a continuous 3 s or more even though the brake switch (No.2 signal) changes.
C0040:24	Brake switch (No.1 signal) circuit malfunction	•  The start stop unit detected the following condition 5 times continuously with the ignition switched ON (engine off or on). ―  The brake switch (No.1 signal) is ON for a continuous 3 s or more even though the brake switch (No.2 signal) changes.
C0051:2F*2	Steering angle sensor signal error	•  Start stop unit detects the steering angle sensor signal error for 5 s or more with the ignition switched ON (engine off or on).
C0051:95*2	Steering angle sensor assembly malfunction	•  Start stop unit receives the following signals with the ignition switched ON (engine off or on). ―  Steering angle sensor assembly malfunction from electric power steering (EPS) control module for 1 s or more ―  Improper assembly of steering angle sensor at 360° ―  Steering wheel angle of 720° or more for 0.048 s or more
C0052:14*2	Steering angle sensor A signal circuit malfunction	•  Start stop unit detects an open circuit or short to ground in the steering angle sensor A signal circuit.
C0052:2F*2	Steering angle sensor A signal malfunction	•  When any of the following conditions is met: ―  Start stop unit detected the sudden change in steering angle sensor A signal. ―  Start stop unit detected that the steering angle sensor A signal is stuck with the ignition switched ON (engine off or on).
C0053:14*2	Steering angle sensor B signal circuit malfunction	•  Start stop unit detects an open circuit or short to ground in steering angle sensor B signal circuit.
C0053:2F*2	Steering angle sensor B signal malfunction	•  When any of the following conditions is met: ―  Start stop unit detects the sudden change in steering angle sensor B signal. ―  Start stop unit detects that the steering angle sensor B signal is stuck with the ignition switched ON (engine off or on).
C2003:13	Open circuit in steering switch	•  Start stop unit detects an open circuit in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).
P0560:16	Start stop unit power supply (ESCL) voltage low input	•  Start stop unit power supply (ESCL) circuit voltage of less than 8.5 V is detected for 5 s or more.
P0615:11	Starter relay circuit malfunction	•  Start stop unit detects that the starter relay monitor circuit voltage of less than 2.2 V for 0.2 s or more with the ignition switched off.
P0615:12	Starter relay circuit malfunction	•  Start stop unit detects that the starter relay circuit voltage of specification or more for 0.1 s or more with the ignition switched off.
P0615:13	Starter relay circuit malfunction	•  Start stop unit detects an open circuit in the starter relay circuit for 0.075 s or more with the ignition switched off.
P0615:16	Starter relay circuit malfunction	•  Start stop unit detects that the starter relay circuit voltage that is less than the specification for 0.05 s or more during cranking.
P0616:23	Circuit malfunction on downstream side of starter relay	•  Start stop unit detects a short to ground in the starter relay downstream circuit continuously for 0.5 s or more for a continuous 5 times.
P0616:24	Circuit malfunction on downstream side of starter relay	•  Start stop unit detects an open circuit in the starter relay downstream circuit continuously for 0.5 s or more for a continuous 5 times.
P0616:29	Downstream side of starter relay signal malfunction	•  Start stop unit detects that the following signals are unmatched for 0.5 s or more for a continuous 5 times. ―  Transmission range switch condition ―  Starter relay downstream circuit condition ―  PCM control result ―  CAN signal condition output from PCM
P081C:23	NOT P position switch circuit malfunction	•  Start stop unit detects that the NOT P position switch is stuck on for 5 s or more for a continuous 5 times with the ignition switched ON (engine off or on).
P081C:24	NOT P position switch circuit malfunction	•  Start stop unit detects that the NOT P position switch is stuck off for 5 s or more for a continuous 5 times with the ignition switched ON (engine off or on).
P0850:23	Transaxle range sensor circuit malfunction	•  Start stop unit detects that the transaxle range sensor signal is P or N position for 1 s or more continuously for a continuous 5 times or more even though the TCM CAN signal is other than P and N position with the ignition switched ON (engine off or on).
P0850:24	Transaxle range sensor circuit malfunction	•  Start stop unit detects that the transaxle range sensor signal is other than P and N position for 1 s or more continuously for a continuous 5 times or more even though the TCM CAN signal is in P or N position with the ignition switched ON (engine off or on).
P0930:71	Shift-lock solenoid circuit malfunction	•  The start stop unit detects that the shift-lock solenoid is stuck on for 30 min or more with the ignition switched ON (engine off or on).
P1794:16	Start stop unit power supply voltage (terminal 2W) low input	•  Start stop unit power supply circuit voltage (terminal 2W) of less than 6.5 V is detected for 5 s or more.
U0001:88	Module communication error (HS-CAN)	•  Start stop unit detects the CAN bus communication line (HS-CAN) malfunction 10 times continuously with the ignition switched ON (engine off or on).
U0028:87	Communication error with rear body control module (RBCM)	•  Start stop unit detects the communication error with rear body control module (RBCM) 10 times continuously.
U0100:00	Communication error with PCM	•  Start stop unit could not receive the CAN signal from the PCM for 1 s or more with the ignition switched ON (engine off or on).
U0101:00	Communication error with TCM	•  Start stop unit could not receive the CAN signal from the TCM for 1 s or more with the ignition switched ON (engine off or on).
U0121:00	Communication error with DSC HU/CM	•  Start stop unit could not receive the CAN signal from the DSC HU/CM for 1 s or more with the ignition switched ON (engine off or on).
U0121:87	Communication error with DSC HU/CM	•  Start stop unit could not receive the CAN signal from the DSC HU/CM for 10 s or more with the ignition switched off.
U0131:00	Communication error with electric power steering (EPS) control module	•  Start stop unit could not receive the CAN signal from the electric power steering (EPS) control module for 1.2 s or more with the ignition switched ON (engine off or on).
U0140:00	Communication error with front body control module (FBCM)	•  Start stop unit could not receive the CAN signal from the front body control module (FBCM) for 5 s or more with the ignition switched ON (engine off or on).
U0146:00	Communication error with instrument cluster	•  Start stop unit could not receive the CAN signal from the instrument cluster for 5 s or more with the ignition switched ON (engine off or on).
U0151:00	Communication error with SAS control module	•  Start stop unit could not receive the CAN signal from the SAS control module for 1 s or more with the ignition switched ON (engine off or on).
U0155:00	Communication error with instrument cluster	•  Start stop unit could not receive the CAN signal from the instrument cluster for 5 s or more with the ignition switched ON (engine off or on).
U0447:86	Error signal received from instrument cluster	•  Start stop unit receives the error signals from the instrument cluster for 5 s or more with the ignition switched ON (engine off or on).
U201F:11	Keyless receiver circuit malfunction	•  Start stop unit detects that the keyless receiver circuit voltage of less than 3.4 V for 0.5 s or more.
U201F:12	Keyless receiver circuit malfunction	•  Start stop unit detects that the keyless receiver circuit voltage of 6.2 V or more for 0.5 s or more.
U2100:00	Start stop unit configuration not completed	•  Although the engine cannot be started with the ignition switched off or to ACC, if the ignition is switched ON (engine off), the engine can be started.
U2300:00	Configuration data not received from instrument cluster	•  Start stop unit cannot receive the configuration data from the instrument cluster for 1 s or more with the ignition switched ON (engine off or on).
U3000:01	Start stop unit internal malfunction	•  Start stop unit detects the internal malfunction.
U3000:49	Start stop unit internal malfunction	•  Start stop unit detects the internal malfunction.
U3000:96	Start stop unit malfunction	•  Start stop unit malfunction detected.
U3003:16	Start stop unit power supply voltage (terminal 1A) low input	•  Start stop unit power supply circuit voltage (terminal 1A) of 5V or more, less than 8.5 V is detected for 5 s or more.
U3004:11	ACC relay circuit malfunction	•  Start stop unit detects that the ACC relay output monitor voltage of less than specification for 0.05 s or more with the ignition switched to ACC or ON (engine off or on).
U3004:12	ACC relay circuit malfunction	•  Start stop unit detects that the ACC relay output monitor voltage of 2.5 V or more for 0.5 s or more with the ignition switched off.
U3004:16	ACC relay circuit malfunction	•  Start stop unit detects that the ACC monitor voltage of less than 2.5 V for 1 s or more with the ignition switched to ACC or ON (engine off or on).
U3004:17	ACC relay circuit malfunction	•  Start stop unit detects that the ACC monitor voltage of 2.5 V or more for 5 s or more with the ignition switched off.

Snapshot Data

Note

•  The start stop unit stores the following two types of snapshot data (vehicle information) when a DTC is detected and displays them in the Mazda Modular Diagnostic System (M-MDS).

―  Vehicle information detected by start stop unit

―  Vehicle information detected by instrument cluster and received by start stop unit via CAN communication

Data monitor function

PID/data monitor table

Active Command Modes Function

Note

•  Simulation items on parts which are not equipped to the vehicle do not operate.

Simulation item	Unit/Operation	Data contents	Data read/use method	Output part name	Operation condition
BZR_OUT	Off/On	•  Off: Keyless beeper does not sound. •  On: Keyless beeper sounds.	•  When the simulation item BZR_OUT is turned on, a force override signal is sent to the LF control unit from the start stop unit, and the LF control unit drives (sounds) the keyless beeper. •  With adoption of a separate excitation buzzer to the keyless beeper, buzzer does not sound normally even if the voltage is applied to the buzzer unit because there is no oscillation circuit. The integrity of the keyless beeper is determined using the simulation item BZR_OUT. •  If the keyless buzzer does not sound even though the simulation function BZR_OUT is on, perform diagnosis using the following procedure. ―  Press the remote transmitter lock/unlock button repeatedly and measure the terminal voltage of the keyless buzzer when the button is pressed. Voltage is output •  Keyless buzzer malfunction may have occurred. Voltage is not output •  Related wiring harness, or LF control unit malfunction may have occurred.	Keyless beeper	Ignition switched ON (engine off or on)
T_SEN_P_LF	Off/On	Note •  Displayed on M-MDS but does not function.
T_SEN_P_RF	Off/On	Note •  Displayed on M-MDS but does not function.