PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU

CHECK PRE-CRASH SAFETY CITY SENSOR

1. Disconnect the O9 pre-crash safety city sensor connector.

   Note:

   • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

   • Do not apply excessive force to the O9 pre-crash safety city sensor connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   O9-3 (LDSW) - Body ground	R - Body ground	Lane departure alert switch signal	Lane departure alert switch being pressed	Below 1 Ω
   			Lane departure alert switch not being pressed	100 kΩ or higher
   O9-9 (PCSW) - Body ground	Y - Body ground	Pre-crash system cancel switch assembly signal	Pre-crash system cancel switch assembly being pressed	Below 1 Ω
   			Pre-crash system cancel switch assembly not being pressed	100 kΩ or higher
   O9-7 (IG1) - Body ground	G - Body ground	Power source	Ignition switch ON	11 to 14 V
   			Ignition switch off	Below 1 V
   O9-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

   Tip:

   If the result is not as specified, there may be a malfunction on the wire harness side.

3. Reconnect the O9 pre-crash safety city sensor connector.

4. Measure the voltage according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   O9-8 (BUZ) - Body ground*1	GR - Body ground*3 W - Body ground*4	Pre-crash safety city buzzer operation signal	Ignition switch ON Pre-crash safety city buzzer not operating	11 to 14 V
   			Ignition switch ON Pre-crash safety city buzzer operating	0 to 1.5 V
   O9-8 (BUZ) - Body ground*2	GR - Body ground	Pre-crash safety city heater operation signal	Ignition switch ON Pre-crash safety city heater not operating	11 to 14 V
   			Ignition switch ON Pre-crash safety city heater operating	0 to 1.5 V
   O9-1 (SPR) - Body ground*5	L - Body ground	Reverse switch signal	Ignition switch ON Shift lever in R	11 to 14 V
   			Ignition switch ON Shift lever not in R	Below 1 V
   O9-1 (SPR) - Body ground*2	V - Body ground	Pre-crash safety city heater drive signal	Ignition switch ON Pre-crash safety city heater not operating	11 to 14 V
   			Ignition switch ON Pre-crash safety city heater operating	Below 1 V

   *1: w/ Pre-crash Safety City Buzzer

   *2: w/ Pre-crash Safety City Heater

   *3: except Sedan

   *4: for Sedan

   *5: for Manual Transaxle without Pre-crash Safety City Heater

5. Check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   O9-5 (CA1P) - Body ground	P - Body ground*1 W - Body ground*2	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
   O9-11 (CA1N) - Body ground	W - Body ground	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)

   *1: except Sedan

   *2: for Sedan

6. 

   Waveform 1

   1. CAN communication signal

      Item	Content
      Tester Connection	CH1: O9-5 (CA1P) - Body ground CH2: O9-11 (CA1N) - Body ground
      Tool Setting	1 V/DIV., 50 μsec./DIV.
      Condition	Ignition switch ON

      Tip:

      If the result is not as specified, the CAN bus line, terminating resistor circuit (or part with this circuit) or pre-crash safety city sensor is malfunctioning.