Terminals Of Ecu
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK AIR CONDITIONING AMPLIFIER
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Measure the voltage and resistance of the connectors.
HINT:
Check from the rear of the connector while it is connected to the air conditioning amplifier.
AIR CONDITIONING AMPLIFIER TERMINALS VOLTAGE AND RESISTANCE SPECIFICATIONSymbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition B (E37-21) - GND (E37-14) R - W-B Power source (Back-up) Always 10 to 14 V SOL+ (E37-2) - GND (E37-14) GR - W-B A/C compressor operation signal Engine idling Pulse generation
See Fig 2Blower switch LO A/C switch ON BLW (E37-23) - GND (E37-14) R - W-B Blower motor control signal Ignition switch ON Pulse generation
See Fig 3Blower switch LO PRE (E37-9) - SG-2 (E37-13) L - G Air conditioning pressure sensor signal Refrigerant pressure: Normal 0.76 to 4.74 V PRE (E37-9) - SG-2 (E37-13) L - G Air conditioning pressure sensor signal Refrigerant pressure: Abnormal (less than 0.196 MPa [2.0 kgf/cm2 , 28 psi]) Below 0.76 V PRE (E37-9) - SG-2 (E37-13) L - G Air conditioning pressure sensor signal Refrigerant pressure: Abnormal (more than 3.14 MPa [32 kgf/cm2 , 455 psi]) 4.74 V or higher TSD (E37-33) - S5-4 (E37-31) L - LG Driver side solar sensor signal Ignition switch ON 0.8 to 4.3 V Solar sensor subject to electric light TSP (E37-32) - S5-4 (E37-31) P - LG Passenger side solar sensor signal Ignition switch ON 0.8 to 4.3 V Solar sensor subject to electric light TR (E37-29) - SG-1 (E37-34) CR - V Room temperature sensor signal Ignition switch ON 1.8 to 2.2 V Vehicle interior temperature: 25°C (77°F) SG-1 (E37-34) - Body ground V - Body ground Ground for room temperature sensor Always Below 1 GND (E37-14) - Body ground W-B - Body ground Ground for main power supply Always Below 1 IG+ (E37-1) - GND (E37-14) Y - W-B Power source (IG) Ignition switch ON 10 to 14 V S5-3 (E37-10) - GND (E37-14) B - W-B Power supply for pressure sensor Ignition switch ON 4.5 to 5.5 V CANH (E37-11) - GND (E37-14) V - W-B Hi-level CAN bus line Ignition switch ON Pulse generation
See Fig 4CANL (E37-12) - GND (E37-14) W - W-B Lo-level CAN bus line Ignition switch ON Pulse generation
See Fig 5SG-2 (E37-13) - Body ground G - Body ground Ground for pressure sensor Always Below 1 RDFG (E37-38) - GND (E37-14) B - W-B Rear defogger switch signal Ignition switch ON
Rear defogger switch OFF10 to 14 V RDFG (E37-38) - GND (E37-14) B - W-B Rear defogger switch signal Ignition switch ON
Rear defogger switch ONBelow 1 V LIN1 (E37-37) - GND (E37-14) B - W-B LIN communication signal Ignition switch ON Pulse generation BUS G (c1-2) - Body ground - Ground for BUS IC Always Below 1 BUS (c1-3) - BUS G (c1-2) - BUS IC control signal Ignition switch ON Pulse generation B BUS (c1-4) - BUS G (c1-2) - Power supply for BUS IC Ignition switch ON 11 to 13 V SGA (c1-5) - Body ground - Ground for evaporator temperature sensor Always Below 1 TEA (c1-6) - SGA (c1-5) - Evaporator temperature sensor signal Ignition switch ON 1.4 to 1.8 V Evaporator temperature: 15°C (59°F) LOCK (E37-8)* - SG-2 (E37-13) W - G Compressor lock sensor signal Ignition switch ON
AUTO switch ON
A/C switch ON
Magnetic clutch ONPulse generation
See Fig 6MGC (E37-20)* - GND (E37-14) V - W-B Magnetic clutch relay signal Ignition switch ON
Magnetic clutch OFF10 to 14 V MGC (E37-20)* - GND (E37-14) V - W-B Magnetic clutch relay signal Ignition switch ON
Magnetic clutch ONBelow 1.5 V HINT:
*: for 2GR-FE
- Using an oscilloscope, check waveform 1.
A/C Compressor* operation signal
ITEM AND CONTENT REFERENCE (WAVEFORM 1)Item Content Symbols (Terminal No.) SOL+ (E37-2) - GND (E37-14) Tool Setting 5 V/DIV., 500 msec./DIV. Condition Engine idling, Blower switch LO, A/C switch ON HINT:
*: Compressor and pulley for 2AZ-FE, Compressor and magnetic clutch for 2GR-FE.
- Using an oscilloscope, check waveform 2.
Blower motor control signal
ITEM AND CONTENT REFERENCE (WAVEFORM 2)Item Content Symbols (Terminal No.) BLW (E37-23) - GND (E37-14) Tool Setting 1 V/DIV., 500 msec./DIV. Condition Ignition switch ON, Blower switch LO HINT:
When the blower level is increased, the duty ratio changes accordingly.
- Using an oscilloscope, check waveform 3.
CAN communication signal
ITEM AND CONTENT REFERENCE (WAVEFORM 3)Item Content Symbols (Terminal No.) CANH (E37-11) - GND (E37-14) Tool Setting 1 V/DIV., 10 msec./DIV. Condition Ignition switch ON HINT:
The waveform varies depending on the CAN communication signal.
- Using an oscilloscope, check waveform 4.
CAN communication signal
ITEM AND CONTENT REFERENCE (WAVEFORM 4)Item Content Symbols (Terminal No.) CANL (E37-12) - GND (E37-14) Tool Setting 1 V/DIV., 10 msec./DIV. Condition Ignition switch ON HINT:
The waveform varies depending on the CAN communication signal.
- Using an oscilloscope, check waveform 5.
Compressor lock sensor signal*
ITEM AND CONTENT REFERENCE (WAVEFORM 5)Item Content Symbols (Terminal No.) LOCK (E37-8)* - SG-2 (E37-13) Tool Setting 500 mV/DIV., 20 msec./DIV. Condition Ignition switch ON, AUTO switch ON, A/C switch ON, Magnetic clutch ON HINT:
*: for 2GR-FE
- Measure the voltage and resistance of the connectors.
- CHECK AIR CONDITIONING CONTROL
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Measure the voltage and resistance of the connectors.AIR CONDITIONING CONTROL TERMINALS VOLTAGE AND RESISTANCE SPECIFICATION
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG+ (E23-2) - GND (E23-7) L - W-B Power source (IG) Ignition switch ON 10 to 14 V GND (E23-7) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 LIN1 (E23-11) - GND (E23-7) B - W-B LIN communication signal Ignition switch ON Pulse generation +B (E23-1) - GND (E23-7) R - W-B Power source (Back-up) Always 10 to 14 V ACC (E23-8) - GND (E23-7) GR - W-B ACC power supply Always Below 1
- Measure the voltage and resistance of the connectors.