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For the layout of the certification ECU (smart key ECU assembly) terminals, refer to the following (Click here).
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For the layout of the ID code box (immobiliser code ECU) terminals, refer to the following (Click here).
Click here
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CHECK POWER MANAGEMENT CONTROL ECU
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Disconnect the A20, H3 and H4 connectors.
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Measure the voltage and resistance according to the value(s) in the table below.
Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item A20-2 (IG2D) - Body ground Output V - Body ground IG2 signal 20°C (68°F) 131 to 230 Ω IG2 Relay Monitor (Outside) A20-23 (STP) - Body ground Input L - Body ground Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Stop Light Switch1 H3-1 (AM22) - Body ground Input W - Body ground +B power supply Always 9.5 to 14 V - H4-7 (AM21) - Body ground Input W - Body ground +B power supply Always 9.5 to 14 V - H3-6 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω - H4-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω - H4-24 (CA1L) - Body ground Input/Output V - Body ground CAN communication line Always 10 kΩ or higher - H4-25 (CA1H) - Body ground Input/Output P - Body ground CAN communication line Always 10 kΩ or higher - H4-17 (SSW2) - Body ground Input Y - Body ground SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)
Tip:Backup for SSW1. Behaves the same way as SSW1.
Power switch pushed → Power switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch2 H3-7 (SSW1) - Body ground Input B - Body ground SSW1 contact signal Power switch pushed → Power switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch1 H4-1 (ACCD) - Body ground Output G - Body ground ACC signal 20°C (68°F) 81.49 to 118.98 Ω ACC Relay Monitor H4-2 (IG1D) - Body ground Output B - Body ground IG1 signal 20°C (68°F) 54.32 to 79.32 Ω IG1 Relay Monitor (Outside) H4-11 (LIN2) - Body ground Input/Output B - Body ground LIN communication line Always 10 kΩ or higher - If the result is not as specified, there may be a malfunction in the wire harness.
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Reconnect the A20, H3 and H4 connectors.
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Measure the voltage and check for pulses according to the value(s) in the table below.
Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item A20-2 (IG2D) - H3-6 (E1) Output V - W-B IG2 signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG2 Relay Monitor (Outside) H3-9 (INDW) - H3-6 (E1) Output G - W-B Power switch indicator (orange) illumination output Brake pedal released, park (P) selected, power switch on (ACC), or on (IG) → Other than previous condition 7 V or higher → 1 V or less - A20-22 (PCON) - H3-6 (E1) Output LG - W-B P position signal Park (P) selected Pulse generation
(See waveform 1)
- A20-28 (PPOS) - H3-6 (E1) Input V - W-B P position signal Park (P) selected Pulse generation
(See waveform 1)
- H4-17 (SSW2) - H3-6 (E1) Output Y - W-B SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)
Tip:Backup for SSW1. Behaves the same way as SSW1.
Power switch pushed → Power switch not pushed 9 V or higher → 1 V or less Start Switch2 H3-7 (SSW1) - H3-6 (E1) Output B - W-B Power switch signal Power switch pushed → Power switch not pushed 9 V or higher → 1 V or less Start Switch1 H4-1 (ACCD) - H3-6 (E1) Output G - W-B ACC signal Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher ACC Relay Monitor H4-2 (IG1D) - H3-6 (E1) Output B - W-B IG1 signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG1 Relay Monitor (Outside) H3-8 (INDS) - H3-6 (E1) Output R - W-B Power switch indicator (green) illumination output Brake pedal depressed, park (P) selected 7 V or higher - H3-14 (SPDI) - H3-6 (E1) Input V - W-B Vehicle speed signal Power switch on (IG), vehicle being driven at approx. 5 km/h (3 mph) Pulse generation
(See waveform 2)
Vehicle Speed Signal H4-20 (IMO) - H3-6 (E1) Output L - W-B ID code box (immobiliser code ECU) communication input
(Signal input from power management control ECU to ID code box (immobiliser code ECU))
Power switch off 11 to 14 V - Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected Pulse generation
(See waveform 3)
H4-21 (IMI) - H3-6 (E1) Input R - W-B ID code box (immobiliser code ECU) communication output
(Signal output from ID code box (immobiliser code ECU) to power management control ECU)
Power switch off 11 to 14 V Power switch on (IG) Pulse generation
(See waveform 3)
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Using an oscilloscope, check the signal waveform of the ECU.
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Waveform 1
Tester Connection CH1: A20-22 (PCON) - H3-6 (E1)
CH2: A20-28 (PPOS) - H3-6 (E1)
Tool Setting 10 V/DIV., 10 ms/DIV. Vehicle Condition Power switch on (IG) -
Waveform 2
Tester Connection H3-14 (SPDI) - H3-6 (E1) Tool Setting 5 V/DIV., 10 ms/DIV. Vehicle Condition Driving at approx. 20 km/h (12 mph) Tip:The wavelength becomes shorter as the vehicle speed increases.
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Waveform 1 (Reference)
Table 1. Text in Illustration *a Approximately 160 ms *b Approximately 510 ms Table 2. Measurement Condition Item Content Tester Connection H4-20 (IMO) - H3-6 (E1) Tool Setting 2 V/DIV., 200 ms/DIV. Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected -
Waveform 2 (Reference)
Table 3. Text in Illustration *a Approximately 160 ms *b Approximately 510 ms Table 4. Measurement Condition Item Content Tester Connection H4-21 (IMI) - H3-6 (E1) Tool Setting 2 V/DIV., 200 ms/DIV. Condition Power switch on (IG)
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