AIR CONDITIONING SYSTEM TERMINALS OF ECU
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AIR CONDITIONING AMPLIFIER ASSEMBLY
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Disocnnect the P58 air conditioning amplifier assembly connector.
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Measure the voltage and resistance according to the value(s) in the table below.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition P58-1 (+B1) - Body ground W - W-B Power source (Back-up) Always 11 to 14 V P58-2 (IG+) - Body ground R - Body ground Power source (IG) Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V P58-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 V -
Reconnect the P58 air conditioning amplifier assembly connector.
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Measure the voltage and resistance according to the value(s) in the table below.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition P58-6 (BLW) - Body ground W - Body ground Blower motor speed control signal
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Engine switch on (IG)
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Blower switch: LO
Pulse generation
(See waveform 1)
P58-7 (NANO) - Body ground V - Body ground Ion generator sub-assembly operation signal
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Engine switch on (IG)
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Blower switch: Off → LO
4.75 to 5.25 V → Below 1 V P58-11 (CANH) - CAN communication line - - P58-12 (CANL) - CAN communication line - - P58-14 (LIN1) - Body ground B - Body ground LIN communication signal Engine switch on (IG) Pulse generation
(See waveform 2)
P57-1 (SG-1) - Body ground B - Body ground Ground for sensor Always Below 1 Ω P57-2 (SG-2) - Body ground GR - Body ground Ground for sensor Always Below 1 Ω P57-6 (S5-3) - Body ground V - Body ground Power source of sensor Engine switch off → on (IG) Below 1 V → 4.75 to 5.25 V P57-13 (TAM) - P57-2 (SG-2) BR - GR Ambient temperature sensor signal
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature 10 °C (50 °F)
1.8 to 2.4 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 15 °C (59 °F)
1.65 to 2.15 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 20 °C (68 °F)
1.5 to 1.95 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 25°C (77°F)
1.35 to 1.75 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 30 °C (86 °F)
1.2 to 1.55 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 35 °C (95 °F)
1.0 to 1.4 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 40 °C (104 °F)
0.85 to 1.25 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 45 °C (113 °F)
0.75 to 1.10 V
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Engine switch on (IG) (do not start the engine and electric motor)
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Ambient temperature: 50 °C (122 °F)
0.65 to 1.0 V P57-14 (TR) - Body ground P - Body ground Room temperature sensor signal
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Engine switch on (IG)
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Cabin temperature: 25°C (77°F)
1.8 to 2.2 V
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Engine switch on (IG)
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Cabin temperature: 40°C (104°F)
1.2 to 1.6 V P57-20 (ECOS) - Body ground W - Body ground Combination switch assembly (ECO drive mode) signal
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Engine switch on (IG)
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Combination switch assembly (ECO drive mode) off → on
11 to 14 V → Below 1 V P57-24 (PRE) - P57-3 (SG-7) SB - G Air conditioner pressure sensor signal
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Engine running
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Air conditioning system operating
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Refrigerant pressure: Normal pressure (below 3025 kPa [30.8 kgf/cm2, 439 psi] and higher than 176 kPa [1.8 kgf/cm2, 26 psi])
0.62 to 4.73 V* P57-25 (DGS) - P57-2 (SG-2) G - GR Smog ventilation sensor signal (HC, CO)
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Engine switch on (IG)
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Cabin temperature: 25 °C (77 °F)
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Humidity: 65%
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Spray with clean air
5 to 80 kΩ P58-26 (NAIN) - Body ground V - Body ground Ion generator sub-assembly operation condition signal
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Engine switch on (IG)
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Blower switch: Off → LO
4.75 to 5.25 V → Below 1 V P57-27 (DGS 1) - P57-2 (SG-2) GR - GR Smog ventilation sensor signal (NOx)
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Engine switch on (IG)
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Cabin temperature: 25 °C (77 °F)
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Humidity: 65%
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Spray with clean air
1.25 to 80 kΩ z1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V z1-3 (BUS) - z1-2 (BUS G) - BUS IC control signal Engine switch on (IG) Pulse generation
(See waveform 3)
z1-4 (B BUS) - z1-2 (BUS G) - Power supply for BUS IC Always 11 to 14 V z1-5 (SGA) - Body ground - Ground for No. 1 cooler thermistor Always Below 1 Ω z1-6 (TEA) - z1-5 (SGA) - No. 1 cooler thermistor signal
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Engine switch on (IG)
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Evaporator temperature: 0°C (32°F)
1.7 to 2.1 V
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Engine switch on (IG)
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Evaporator temperature: 15°C (59°F)
0.9 to 1.3 V
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*: While sensor voltage is 5 V
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Waveform 1:
Item Content Terminal No. P58-6 (BLW) - Body ground Tool Setting 1 V/DIV., 500 μs./DIV. Vehicle Condition
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Engine switch on (IG)
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Blower switch: LO
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Waveform 2:
Item Content Terminal No. P58-14 (LIN1) - Body ground Tool Setting 2 V/DIV., 20 μs./DIV. Vehicle Condition Engine switch on (IG) -
Waveform 3:
Item Content Terminal No. z1-3 (BUS) - z1-2 (BUS G) Tool Setting 2 V/DIV., 20 μs./DIV. Vehicle Condition Engine switch on (IG)
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INTEGRATION CONTROL AND PANEL ASSEMBLY
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Disconnect the P73 integration control and panel assembly connector.
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Measure the voltage and resistance according to the value(s) in the table below.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition P73-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω P73-8 (IG+) - Body ground LA-G - Body ground Power source (IG) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V -
Reconnect the P73 integration control and panel assembly connector.
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Check for waveform according to the value(s) in the table below.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition P73-6 (LIN1) - Body ground V - Body ground LIN communication Engine switch on (IG) Pulse generation
(See waveform 1)
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Waveform 1:
Item Content Terminal No. P73-6 (LIN1) - Body ground Tool Setting 2 V/DIV., 20 μs./DIV. Vehicle Condition Engine switch on (IG)
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ECM
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w/ Canister Pump Module: Click here
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w/o Canister Pump Module: Click here
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MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)