ENTRY AND START SYSTEM(for Start Function) TERMINALS OF ECU

CHECK POWER MANAGEMENT CONTROL ECU

1. Disconnect the H70 and H71 power management control ECU connectors.

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
   H71-1 (AM22) - Body ground	L - Body ground	+B power supply	Always	9.5 to 16 V
   H71-2 (AM21) - Body ground	B - Body ground	+B power supply	Always	9.5 to 16 V
   H71-5 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   H71-6 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   H71-17 (SSW2) - Body ground	L - Body ground	Engine switch signal	Engine switch pushed	Below 1 Ω
   H71-17 (SSW2) - Body ground	L - Body ground	Engine switch signal	Engine switch not pushed	10 kΩ or higher
   H71-18 (SSW1) - Body ground	R - Body ground	Engine switch signal	Engine switch pushed	Below 1 Ω
   H71-18 (SSW1) - Body ground	R - Body ground	Engine switch signal	Engine switch not pushed	10 kΩ or higher
   H71-24 (LIN2) - Body ground	V - Body ground	LIN line	Always	10 kΩ or higher

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

3. Reconnect the H70 and H71 power management control ECU connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   H71-3 (SLP) - H71-6 (GND)	G - W-B	Steering lock actuator position signal	Steering lock released	Pulse generation (See waveform 1)
   H71-3 (SLP) - H71-6 (GND)	G - W-B	Steering lock actuator position signal	Steering lock locked	Pulse generation (See waveform 1)
   H71-8 (SLR+) - H71-6 (GND)	P - W-B	Steering lock motor signal	Steering lock motor operating	Below 1 V
   H71-8 (SLR+) - H71-6 (GND)	P - W-B	Steering lock motor signal	Steering lock motor not operating	11 to 14 V
   H71-10 (INDW) - H71-6 (GND)	W - W-B	Warning signal	for Manual Transaxle: Clutch pedal depressed Engine switch on (ACC) or on (IG) except Manual Transaxle: Brake pedal depressed Shift lever in P Engine switch on (ACC) or on (IG)	8 to 14 V
   H71-16 (P) - H71-6 (GND)	BE - W-B	Shift lock signal	Shift lever in P*1	8 to 14 V
   H71-16 (P) - H71-6 (GND)	BE - W-B	Shift lock signal	Shift lever not in P*1	Below 1 V
   H71-19 (ACCD) - H71-6 (GND)	GR - W-B	ACC signal	Engine switch on (ACC)	8 to 14 V
   H71-19 (ACCD) - H71-6 (GND)	GR - W-B	ACC signal	Engine switch off	Below 1 V
   H71-20 (IG1D) - H71-6 (GND)	W - W-B	IG1 signal	Engine switch on (IG)	8 to 14 V
   H71-20 (IG1D) - H71-6 (GND)	W - W-B	IG1 signal	Engine switch on (ACC)	Below 1 V
   H71-22 (INDS) - H71-6 (GND)	G - W-B	Vehicle condition signal	for Manual Transaxle: Clutch pedal depressed except Manual Transaxle: Brake pedal depressed Shift lever in P	8 to 14 V
   H71-23 (SPD) - H71-6 (GND)	Y - W-B	Vehicle speed signal	Engine switch on (IG), vehicle being driven at approx. 20 km/h (12 mph)	Pulse generation (See waveform 2)
   H70-2 (STA) - H71-6 (GND)	LG - W-B	Park/neutral position switch*1 or clutch start switch*2 signal	for Manual Transaxle: Clutch pedal depressed except Manual Transaxle: Shift lever in P or N	Below 1 V
   H70-3 (STAR) - H71-6 (GND)	R - W-B *3 G - W-B *4	Starter signal	for Manual Transaxle: Clutch pedal depressed Engine cranking except Manual Transaxle: Brake pedal depressed Shift lever in P Engine cranking	8 to 14 V*5
   H70-8 (IG2D) - H71-6 (GND)	GR - W-B	IG2 signal	Engine switch on (IG)	8 to 14 V
   H70-8 (IG2D) - H71-6 (GND)	GR - W-B	IG2 signal	Engine switch on (ACC)	Below 1 V
   H70-11 (STP1) - H71-6 (GND)	Y - W-B	Stop light signal	Brake pedal depressed*1	8 to 14 V
   H70-11 (STP1) - H71-6 (GND)	Y - W-B	Stop light signal	Brake pedal released*1	Below 1 V

   • *1: except Manual Transaxle

   • *2: for Manual Transaxle

   • *3: w/o Stop and Start System

   • *4: w/ Stop and Start System

   • *5: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the A51 or A76 connector from the ECM before measuring the voltage.

   If the result is not as specified, the ECU may have a malfunction.

5. Using an oscilloscope, check the signal waveform of the ECU.

   1. 

      Waveform 1

      Table 1. Waveform 1 (Reference)

      Terminal No. (Symbol)	H71-3 (SLP) - H71-6 (GND)
      Tool Setting	2 V/DIV., 100 ms./DIV.
      Vehicle Condition	Steering lock locked or released

   2. 

      Waveform 2

      Table 2. Waveform 2 (Reference)

      Terminal No. (Symbol)	H71-23 (SPD) - H71-6 (GND)
      Tool Setting	5 V/DIV., 10 ms./DIV.
      Vehicle Condition	Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

      Tip:

      As the vehicle speed increases, the wavelength shortens.

CHECK CERTIFICATION ECU

1. Disconnect the H51 certification ECU 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
   H51-1 (+B) - Body ground	W - Body ground	+B power supply	Always	11 to 14 V
   H51-15 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   H51-29 (LIN) - Body ground	V - Body ground	LIN line	Always	10 kΩ or higher

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