Mazda CX-5 Service & Repair Manual: Start Stop Unit Inspection

Mazda CX-5 Service & Repair Manual / Engine / Control / Start Stop Unit Inspection

1. Remove the following parts:

a. Column cover.

2. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.

If the system does not work normally even though the inspection items or related wiring harnesses do not have any malfunction, replace the start stop unit.

Terminal Voltage Table (Reference)


Terminal	Signal name	Connected to	Measurement conditions		Voltage (V)	Inspection item(s)
1A	Power supply	ROOM 15 A fuse	Under any condition		B+	ROOM 15 A fuse Battery
1B	Power supply	IG1 15 A fuse	Ignition switched ON (engine off)		B+	IG1 15 A fuse Battery
1B	Power supply	IG1 15 A fuse	Ignition switched OFF (LOCK) or at ACC		1.0 or less	IG1 15 A fuse Battery
1C*1	Brake switch	Brake switch	Brake pedal depressed		B+	Brake switch
1C*1	Brake switch	Brake switch	Brake pedal not depressed		1.0 or less	Brake switch
1D	Starter monitor (MTX)	Starter relay	Ignition switched ON (engine off)	Clutch pedal not depressed	B+	Starter relay Battery
	Starter monitor (MTX)	Starter relay	Ignition switched ON (engine off)	Clutch pedal depressed	1.0 or less	Starter relay Battery
	Starter monitor (ATX)	Starter relay	Ignition switched ON (engine off)	Other than selector lever is in P or N position	B+	Starter relay Battery
	Starter monitor (ATX)	Starter relay	Ignition switched ON (engine off)	Selector lever is in P or N position	1.0 or less	Starter relay Battery
1E	ACC monitor	MIRROR 7.5 A fuse	Switch the ignition to ACC or ON (engine off)		B+	MIRROR 7.5 A fuse Battery
1E	ACC monitor	MIRROR 7.5 A fuse	Ignition switched OFF (LOCK)		1.0 or less	MIRROR 7.5 A fuse Battery
1F	Starter interlock switch (MTX)	Starter interlock switch	Clutch pedal not depressed		B+	Starter interlock switch
	Starter interlock switch (MTX)	Starter interlock switch	Clutch pedal depressed		1.0 or less	Starter interlock switch
	Selector lever position switch (ATX)	TCM	Other than selector lever is in P or N position		B+	TCM
	Selector lever position switch (ATX)	TCM	Selector lever is in P or N position		1.0 or less	TCM
1G	Hazard warning switch signal	Hazard warning switch	Hazard warning switch not pressed (OFF)		B+	MIRROR 7.5 A fuse Battery
1G	Hazard warning switch signal	Hazard warning switch	Hazard warning switch pressed (ON)		1.0 or less	MIRROR 7.5 A fuse Battery
1H	Push button start 1	Push button start	Push button start pressed		1.0 or less	Push button start
1H	Push button start 1	Push button start	Push button start not pressed		B+	Push button start
1I	Push button illumination	Push button start	Determination using terminal voltage inspection is not possible.			Push button start
1J*1	P position	Not P position switch	Selector lever is in P position		B+	Not P position switch
1J*1	P position	Not P position switch	Except above		1.0 or less	Not P position switch
1K	Push button illumination (green)	Push button start	Engine starting conditions are met		1.0 or less	Push button start
1K	Push button illumination (green)	Push button start	Except above		B+	Push button start
1M	Push button illumination (amber)	Push button start	Ignition switched to ACC or ON (engine off)		1.0 or less	Push button start
1M	Push button illumination (amber)	Push button start	Except above		B+	Push button start
1P	Lock input	Door lock-link switch (driver's door)	Driver's door locked		1.0 or less	Door lock-link switch (driver's door)
1P	Lock input	Door lock-link switch (driver's door)	Driver's door unlocked		Approx. 5	Door lock-link switch (driver's door)
1Q	Rear body control module (RBCM) communication	Rear body control module (RBCM)	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
1S*5	Steering angle sensor power supply	Steering angle sensor	The specified time has elapsed since key placed outside vehicle and all doors locked		1.0 or less	Steering angle sensor
1S*5	Steering angle sensor power supply	Steering angle sensor	Except above		Approx. 5	Steering angle sensor
1T*5	Steering angle sensor ground	Steering angle sensor	Under any condition		1.0 or less	Steering angle sensor
1U*5	Steering angle sensor (signal A/D1)	Steering angle sensor	Steering wheel is turned to left and right		4.00—4.75?0.25—0.75	Steering angle sensor
1V	Windshield wiper switch signal (LO)	Front body control module (FBCM)	Ignition switch ON (engine off or on)	Other than windshield wiper switch at LO and HI	B+	Front body control module (FBCM)
1V	Windshield wiper switch signal (LO)	Front body control module (FBCM)	Ignition switch ON (engine off or on)	Windshield wiper switch at LO	1.0 or less	Front body control module (FBCM)
1W*5	Steering angle sensor (signal A/D1)	Steering angle sensor	Steering wheel is turned to left and right		4.00—4.75?0.25—0.75	Steering angle sensor
1X	Headlight switch signal (LO)	Front body control module (FBCM)	Light switch at position other than HEAD and passing		B+	Front body control module (FBCM)
1X	Headlight switch signal (LO)	Front body control module (FBCM)	Light switch at HEAD position		1.0 or less	Front body control module (FBCM)
1Y	Cruise control switch signal	Cruise control switch	RESUME switch is pressed		Approx. 1.5	Cruise control switch
			CANCEL switch is pressed		1.0 or less
			ON switch is pressed		Approx. 1.9
			OFF switch is pressed		1.0 or less
			SET (+) switch is pressed
			SET (-) switch is pressed
			Except above		Approx. 3.6
1Z	Cruise control switch ground	Cruise control switch	Under any condition		1.0 or less	Cruise control switch
1AA	Steering switch signal	Steering switch	Up switch is pressed		1.0 or less	Steering switch
			Down switch is pressed		Approx. 1.2
			INFO button is pressed		Approx. 2.2
			Except above		Approx. 3.3
1AB	Steering switch ground	Steering switch	Under any condition		1.0 or less	Steering switch
1AC	PATS+	Coil antenna (push button start)	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
1AE	PATS-	Coil antenna (push button start)	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
1AF	GROUND	Body ground	Under any condition		1.0 or less	Body ground
2A	GROUND	Body ground	Under any condition		1.0 or less	Body ground
2B	GROUND	Body ground	Under any condition		1.0 or less	Body ground
2C	ACC relay control	ACC relay	Switch the ignition to ACC or ON (engine off or on)		B+	ACC relay
2C	ACC relay control	ACC relay	Ignition switched OFF (LOCK)		1.0 or less	ACC relay
2D	IG2 relay control	Front body control module (FBCM)	Ignition switched ON (engine off)		B+	Front body control module (FBCM)
2D	IG2 relay control	Front body control module (FBCM)	Ignition switched OFF (LOCK) or at ACC		1.0 or less	Front body control module (FBCM)
2E*2	CPP switch	CPP switch	Clutch pedal not depressed		B+	CPP switch
2E*2	CPP switch	CPP switch	Clutch pedal depressed		1.0 or less	CPP switch
2F*3	LF control unit communication	LF control unit	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2G*1	Shift lock	Shift lock solenoid	Ignition switch ON (engine off or on)	Selector lever at position except P	B+	Shift lock solenoid
2G*1	Shift lock	Shift lock solenoid	Ignition switch ON (engine off or on)	Selector lever at P position and brake pedal depressed	1.0 or less	Shift lock solenoid
2H*3	LF control unit communication	LF control unit	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2I*4	Keyless antenna (inside vehicle, center)	Keyless antenna (inside vehicle, center)	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2J	Push button start 2	Push button start	Push button start pressed		1.0 or less	Push button start
2J	Push button start 2	Push button start	Push button start not pressed		B+	Push button start
2K*4	Keyless antenna (inside vehicle, center)	Keyless antenna (inside vehicle, center)	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2L*4	GROUND	Shield ground	Under any condition		1.0 or less	Body ground
2M	HS-CAN+	-	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2O	HS-CAN-	-	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2Q	Keyless receiver power supply	Keyless receiver	Under any condition		Approx. 5	Keyless receiver
2R	Keyless receiver communication	Keyless receiver	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2S	IG1 relay control	IG1 relay	Ignition switched ON (engine off)		B+	IG1 relay
2S	IG1 relay control	IG1 relay	Ignition switched OFF (LOCK) or at ACC		1.0 or less	IG1 relay
2V	Starter relay	Starter relay	When cranking		B+	Starter relay
2V	Starter relay	Starter relay	Except above		1.0 or less	Starter relay
2W	Power supply	AT 15 A fuse	Under any condition		B+	AT 15 A fuse Battery

*1 ATX

*2 MTX

*3 With advanced keyless system

*4 Without advanced keyless system

*5 With steering angle sensor

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