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Start Stop Unit Inspection

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

Terminal Voltage Table (Reference) 

G11273584Courtesy of MAZDA MOTORS CORP.
TERMINAL VOLTAGE REFERENCE

Terminal Signal name Connected to Measurement conditions Voltage (V) Inspection item(s)
1A Power supply INTERIOR 10 A fuse Under any condition B+
  • INTERIOR 10 A fuse
  • Battery
1B Power supply SRS1 7.5A fuse Ignition switched ON (engine off) B+
  • SRS1 7.5A fuse
  • Battery
Ignition switched OFF (LOCK) 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 Starter relay Ignition switched ON (engine off) Other than selector lever is in P or N position B+
  • Starter relay
  • Start stop unit
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 (LOCK) 1.0 or less
1F Selector lever position switch TCM Other than selector lever is in P or N position B+ TCM
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+
  • C/U IG1 15 A fuse
  • AT 15 A fuse
  • INTERIOR 10 A fuse
  • Battery
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 Determination using terminal voltage inspection is not possible. Push button start
1J 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+
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+
1P Lock input Door locklink switch (driver's door) Driver's door locked 1.0 or less Door locklink 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, determination using terminal voltage inspection is not possible.
1S (1) 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 (1) Steering angle sensor ground Steering angle sensor Under any condition 1.0 or less Steering angle sensor
1U (1) 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, HI and MIST B+ Front body control module (FBCM)
Windshield wiper switch at LO 1.0 or less
1W (1) 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)
Light switch at HEAD position 1.0 or less
1Y Cruise control switch signal Cruise control switch OFF/CANCEL switch is pressed Approx. 0 Cruise control switch
SET (-) switch is pressed Approx. 0.3
SET (+) switch is pressed Approx. 0.7
ON or MODE switch is pressed Approx. 1.5
RESUME switch is pressed Approx. 1.5
DISTANCE (+) switch is pressed Approx. 2.0
DISTANCE (-) switch is pressed Approx. 2.4
Except above Approx. 3.7
1Z Cruise control switch ground Cruise control switch Under any condition 1.0 or less Cruise control switch
1AA Steering switch signal Steering switch INFO button is pressed Approx. 2.2 Steering switch
Except above Approx. 3.4
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(2) 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 (LOCK) 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 (LOCK) or at ACC 1.0 or less
2E - - - - -
2F(3) LF control unit communication LF control unit Because this terminal is for communication, determination using terminal voltage inspection is not possible.
2G 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, 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
Push button start not pressed B+
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) Shield ground Shield wire 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
Ignition switched OFF (LOCK) or at ACC 1.0 or less
2V Starter relay Starter relay When cranking B+
  • Starter relay
  • PCM
  • Start stop unit
Except above (5) 1.0 or less, or B+ (5)
2W Power supply AT 15 A fuse Under any condition B+
  • AT 15 A fuse
  • Battery
(1) With AFS (ADAPTIVE FRONT LIGHTING SYSTEM)
(2) With steering lock
(3) With advanced keyless system
(4) Without advanced keyless system
(5) Because the voltage varies depending on the vehicle conditions, examination using the terminal voltage inspection is not possible.
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