START STOP UNIT INSPECTION

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Note

•  Because the start stop unit terminals 3A—3L and 4A—4L are inside the start stop unit and not exposed, the terminal voltage cannot be measured.

•  Terminals with terminal voltage that cannot be measured are not indicated in the terminal voltage table (reference).

1.  Remove the following parts:

(1)  Column cover (See COLUMN COVER REMOVAL/INSTALLATION.)

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)

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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		C/U IG1 15 A fuse	Ignition switched ON (engine off)			B+	•  C/U IG1 15 A fuse •  Battery
				Ignition switched off or at ACC			1.0 or less
1C	Brake switch		Brake switch	Brake pedal depressed			B+	Brake switch
				Brake pedal not depressed			1.0 or less
1D	Starter monitor (MTX)		Starter relay	Ignition switched ON (engine off)	Clutch pedal not depressed		B+	•  Starter relay •  Battery
					Clutch pedal depressed		1.0 or less
	Starter monitor (ATX)		Starter relay	Ignition switched ON (engine off)	Other than selector lever is in P or N position		B+	•  Starter relay •  Battery
					Selector lever is in P or N position		1.0 or less
1E	ACC monitor		MIRROR 7.5 A fuse	Switch the ignition to ACC or ON (engine off or on)			B+	•  MIRROR 7.5 A fuse •  Battery
				Ignition switched off			1.0 or less
1F	Starter interlock switch (MTX)		Starter interlock switch	Clutch pedal not depressed			B+	Starter interlock switch
				Clutch pedal depressed			1.0 or less
	Selector lever position switch (ATX)		TCM (Except MZR 1.6)	Other than selector lever is in P or N position			B+	TCM
				Selector lever is in P or N position			1.0 or less
			Transaxle range switch (MZR 1.6)	Other than selector lever is in P or N position			B+	Transaxle range switch
				Selector lever is in P or N position			1.0 or less
1G	Hazard warning switch signal		Hazard warning switch	Hazard warning switch not pressed (OFF)			B+	Hazard warning switch
				Hazard warning switch pressed (ON)			1.0 or less
1H	Push button start 1		Push button start	Push button start pressed			1.0 or less	Push button start
				Push button start not pressed			B+
1I	Push button illumination		Push button start	Integrity 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
				Except above			1.0 or less
1K	Push button illumination (green)		Push button start	Engine starting conditions are met			1.0 or less	Push button start
				Except above			B+
1L*5	Steering shift switch (up)		Steering shift switch	Steering shift switch (up) pressed			1.0 or less	Steering shift switch
				Steering shift switch (up) not pressed			B+
1M	Push button illumination (amber)		Push button start	Ignition switched to ACC or ON (engine off)			1.0 or less	Push button start
				Except above			B+
1N*5	Steering shift switch (down)		Steering shift switch	Steering shift switch (down) pressed			1.0 or less	Steering shift switch
				Steering shift switch (down) not pressed			B+
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)
				Driver's door unlocked			Approx. 5
1Q	Rear body control module (RBCM) communication		Rear body control module (RBCM)	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
1S*6	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
				Except above			Approx. 5
1T*6	Steering angle sensor ground		Steering angle sensor	Under any condition			1.0 or less	Steering angle sensor
1U*6	Steering angle sensor (signal A/D1)		Steering angle sensor	Steering wheel is turned to left and right			4.00—4.75Û0.25—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)
					Windshield wiper switch at LO		1.0 or less
1W*6	Steering angle sensor (signal A/D1)		Steering angle sensor	Steering wheel is turned to left and right			4.00—4.75Û0.25—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)
				Light switch at HEAD position			1.0 or less
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, integrity determination using terminal voltage inspection is not possible.
1AE	PATS-		Coil antenna (push button start)	Because this terminal is for communication, integrity 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
				Ignition switched off			1.0 or less
2D	IG2 relay control		Front body control module (FBCM)	Ignition switched ON (engine off)			B+	Front body control module (FBCM)
				Ignition switched off or at ACC			1.0 or less
2E*2	Clutch pedal position switch		Clutch pedal position switch	Clutch pedal not depressed			B+	Clutch pedal position switch
				Clutch pedal depressed			1.0 or less
2F*3	LF control unit communication		LF control unit	Because this terminal is for communication, integrity 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
					Selector lever at P position and brake pedal depressed		1.0 or less
2H*3	LF control unit communication		LF control unit	Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible.
2I*4	Keyless antenna (inside vehicle, center)		Keyless antenna (interior, center)	Because this terminal is for communication, integrity 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
				Push button start not pressed			B+
2K*4	Keyless antenna (inside vehicle, center)		Keyless antenna (interior, center)	Because this terminal is for communication, integrity 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, integrity determination using terminal voltage inspection is not possible.
2O	HS-CAN-		-	Because this terminal is for communication, integrity 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, integrity determination using terminal voltage inspection is not possible.
2S	IG1 relay control		IG1 relay	Ignition switched ON (engine off)			B+	IG1 relay
				Ignition switched off or at ACC			1.0 or less
2V	Starter relay		Starter relay	When cranking			B+	•  Starter relay •  PCM •  Start stop unit
				Except above*7			1.0 or less, or B+*7
2W	Power supply		AT 15 A fuse	Under any condition			B+	•  AT 15 A fuse •  Battery
2X	Power supply (ESCL)		SRS2 / ESCL 15 A fuse	Under any condition			B+	•  SRS2 / ESCL 15 A fuse •  Battery