RX400h · Service Manual HEATER & AIR CONDITIONING SYSTEM

TERMINALS OF ECU

System information


AIR CONDITIONING AMPLIFIER
I036314E02

HINT:
Check from the rear of the connector with it connected to the air conditioning amplifier assembly.

Terminal No.
(Symbols)
 Wiring color
 Terminal Description
 Condition
 Specification
A11-1 (IG+) - A11-6 (GND)
 Y - W-B
 Ignition switch signal
 Ignition switch: LOCK or ACC
 Below 1 V
A11-1 (IG+) - A11-6 (GND)
 Y - W-B
 Ignition switch signal
 Ignition switch: ON
 10 to 14 V
A11-2 (B) - A11-6 (GND)
 SB - W-B
 Back-up power source
 Always
 10 to 14 V
A11-3 (MPX+) - A11-6 (GND)
 BR - W-B
 Terminal for BEAN
 Engine idling after engine warmed up
 Pulse generation
A11-4 (MPX-) - A11-6 (GND)
 GR - W-B
 Terminal for BEAN
 Engine idling after engine warmed up
 Pulse generation
A11-5 (WIP) - A11-6 (GND)
 W - W-B
 Wiper operation signal
 Ignition switch: ON
Wiper stop position
 Below 1 V
A11-5 (WIP) - A11-6 (GND)
 W - W-B
 Wiper operation signal
 Ignition switch: ON
Other than wiper stop position
(Operating)
 10 to 14 V
A11-6 (GND) - Body ground
 W-B - Body ground
 Ground for main power supply
 Always
 Below 1 V
A11-8 (FDEF) - A11-6 (GND)
 B - W-B
 Front deicer switch signal
 Ignition switch: ON
Front deicer switch: OFF
 10 to 14 V
A11-8 (FDEF) - A11-6 (GND)
 B - W-B
 Front deicer switch signal
 Ignition switch: ON
Front deicer switch: ON
 Below 1 V
A11-9 (BLW) - A11-6 (GND)
 L - W-B
 Blower switch signal
 Ignition switch: ON
Blower switch: ON
 Pulse generation
(See waveform 1)
A11-10 (TSD) - A11-6 (GND)
 R - W-B*1
Y - W-B*2
Light sensor (Driver side)
 Ignition switch: ON
Light sensor covered with a cloth
 Below 0.8 V
A11-10 (TSD) - A11-6 (GND)
 R - W-B*1
Y - W-B*2
Light sensor (Driver side)
 Ignition switch: ON
Light sensor exposed to electric light
 0.8 to 4.3 V
A11-11 (TSP) - A11-6 (GND)
 Y - W-B*1
R - W-B*2
Light sensor (Passenger side)
 Ignition switch: ON
Light sensor covered with a cloth
 Below 0.8 V
A11-11 (TSP) - A11-6 (GND)
 Y - W-B*1
R - W-B*2
Light sensor (Passenger side)
 Ignition switch: ON
Light sensor exposed to electric light
 0.8 to 4.3 V
A11-18 (HR) - A11-6 (GND)
 W - W-B
 Blower switch signal
 Ignition switch: ON
Blower switch: OFF
 10 to 14 V
A11-18 (HR) - A11-6 (GND)
 W - W-B
 Blower switch signal
 Ignition switch: ON
Blower switch: ON
 Below 1 V
A11-18 (HR) - A11-6 (GND)
 W - W-B
 Blower switch signal
 Ignition switch: OFF
Blower switch: OFF
 Below 1 V
A11-19 (DFG) - A11-6 (GND)
 G - W-B
 Rear defogger switch signal
 Ignition switch: ON
Rear defogger switch: OFF
 10 to 14 V
A11-19 (DFG) - A11-6 (GND)
 G - W-B
 Rear defogger switch signal
 Rear defogger switch: ON
 Below 1 V
A11-21 (TR) - A11-6 (GND)
 O - V
 Room temperature sensor signal
 Ignition switch: ON
Cabin temperature: 25°C (77°F)
 1.8 to 2.2 V
A11-21 (TR) - A11-6 (GND)
 O - V
 Room temperature sensor signal
 Ignition switch: ON
Cabin temperature: 40°C (105°F)
 1.3 to 1.7 V
A11-22 (RH) - A11-6 (GND)
 SB - W-B
 Power supply for humidity sensor
 Ignition switch: ON
 4.5 to 5.5 V
A11-24 (SSR+) - A11-6 (GND)
 P - W-B
 Humidity sensor signal
 Ignition switch: ON
Cabin humidity: 40%
 2.0 V
A11-24 (SSR+) - A11-6 (GND)
 P - W-B
 Humidity sensor signal
 Ignition switch: ON
Cabin humidity: 60%
 2.5 V
A11-26 (SG-5) - Body ground
 V - Body ground
 Ground for room temperature sensor
 Always
 Below 1 V
A10-3 (AIR) - A7-6 (GND)
 R - W-B
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: FRESH
 Below 1 V
A10-3 (AIR) - A11-6 (GND)
 R - W-B
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: RECIRCULATION
 10 to 14 V
A10-4 (AIF) - A11-6 (GND)
 G - W-B
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: RECIRCULATION
 Below 1 V
A10-4 (AIF) - A11-6 (GND)
 G - W-B
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: FRESH
 10 to 14 V
A10-5 (AOF) - A11-6 (GND)
 W - W-B
 Mode switch signal
 Ignition switch: ON
Mode switch: DEF
 Below 1 V
A10-5 (AOF) - A11-6 (GND)
 W - W-B
 Mode switch signal
 Ignition switch: ON
Mode switch: FACE
 10 to 14 V
A10-6 (AOD) - A11-6 (GND)
 B - W-B
 Mode switch signal
 Ignition switch: ON
Mode switch: FACE
 Below 1 V
A10-6 (AOD) - A11-6 (GND)
 B - W-B
 Mode switch signal
 Ignition switch: ON
Mode switch: DEF
 10 to 14 V
A10-7 (TPI) - A10-17 (SG-4)
 BR - L
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: RECIRCULATION
 Above 4 V
A10-7 (TPI) - A10-17 (SG-4)
 BR - L
 Recirculation/Fresh switch signal
 Ignition switch: ON
Recirculation/Fresh switch: FRESH
 Below 1 V
A10-8 (TPO) - A10-18 (SG-3)
 Y - R
 Mode switch signal
 Ignition switch: ON
Mode switch: FACE
 Below 1 V
A10-8 (TPO) - A10-18 (SG-3)
 Y - R
 Mode switch signal
 Ignition switch: ON
Mode switch: DEF
 Above 4 V
A10-9 (TPD) - A10-20 (SG-1)
 P - BR
 Temperature switch signal (Driver side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 Above 4 V
A10-9 (TPD) - A10-20 (SG-1)
 P - BR
 Temperature switch signal (Driver side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 Below 1 V
A10-10 (TPP) - A10-19 (SG-2)
 V - W
 Temperature switch signal (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 Above 4 V
A10-10 (TPP) - A10-19 (SG-2)
 V - W
 Temperature switch signal (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 Below 1 V
A10-11 (SG) - Body ground
 L - Body ground
 Ground for evaporator temperature sensor
 Always
 Below 1 V
A10-12 (TE) - A10-11 (SG)
 GR - L
 Evaporator temperature sensor signal
 Ignition switch: ON
Evaporator temperature: 0°C (32°F)
 2.2 to 2.6 V
A10-12 (TE) - A10-11 (SG)
 GR - L
 Evaporator temperature sensor signal
 Ignition switch: ON
Evaporator temperature: 15°C (59°F)
 1.3 to 1.7 V
A10-13 (S5-4) - A10-17 (SG-4)
 B - L
 Power supply for air inlet damper position sensor
 Ignition switch: ON
 4.5 to 5.5 V
A10-14 (AMDC) - A11-6 (GND)
 LG - W-B
 Temperature switch (Driver side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 Below 1 V
A10-14 (AMDC) - A11-6 (GND)
 LG - W-B
 Temperature switch (Driver side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 10 to 14 V
A10-15 (AMDH) - A11-6 (GND)
 O - W-B
 Temperature switch (Driver side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 Below 1 V
A10-15 (AMDH) - A11-6 (GND)
 O - W-B
 Temperature switch (Driver side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 10 to 14 V
A10-16 (AMPC) - A11-6 (GND)
 R - W-B
 Temperature switch (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 Below 1 V
A10-16 (AMPC) - A11-6 (GND)
 R - W-B
 Temperature switch (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 10 to 14 V
A10-17 (SG-4) - Body ground
 L - Body ground
 Ground for air inlet damper position sensor
 Always
 Below 1 V
A10-18 (SG-3) - Body ground
 R - Body ground
 Ground for air outlet damper position sensor
 Always
 Below 1 V
A10-19 (SG-2) - Body ground
 W - Body ground
 Ground for air mix damper position sensor (Passenger side)
 Always
 Below 1 V
A10-20 (SG-1) - Body ground
 BR - W-B
 Ground for air mix damper position sensor (Driver side)
 Always
 Below 1 V
A10-21 (S5-3) - A10-18 (SG-3)
 V - R
 Power supply for air outlet damper position sensor
 Ignition switch: ON
 4.5 to 5.5 V
A10-22 (S5-2) - A10-19 (SG-2)
 L - W
 Power supply for air mix damper position sensor (Passenger side)
 Ignition switch: ON
 4.5 to 5.5 V
A10-23 (S5-1) - A10-20 (SG-1)
 GR - BR
 Power supply for air mix damper position sensor (Driver side)
 Ignition switch: ON
 4.5 to 5.5 V
A10-24 (AMPH) - A11-6 (GND)
 G - W-B
 Temperature switch (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.COOL
 Below 1 V
A10-24 (AMPH) - A11-6 (GND)
 G - W-B
 Temperature switch (Passenger side)
 Ignition switch: ON
Temperature switch: MAX.HOT
 10 to 14 V
  1. *1: LHD
  2. *2: RHD

  1. Waveform 1:

    1. E108906E07
      Measure the waveform between terminal BLW (A10-9) of the A/C amplifier assembly and body ground.

      OK:
      Waveform appears as shown in the illustration.

      HINT:
      Waveform cycle varies with the blower level.


HYBRID VEHICLE CONTROL ECU

HINT:
Check from the rear of the connector with it connected to the hybrid vehicle control ECU.

Terminal No.
(Symbols)
 Wiring color
 Terminal Description
 Condition
 Specification
H31-13 (PR2) - H31-20 (HP)
 L-W - L-B
 A/C pressure switch signal
 Ignition switch: ON
A/C switch: ON
Refrigerant pressure: 0.196 to 3.14 Mpa (32 kgf/cm2)
 Below 1 V
H31-13 (PR2) - H31-20 (HP)
 L-W - L-B
 A/C pressure switch signal
 Ignition switch: ON
A/C switch: ON
Refrigerant pressure: Below 0.196 Mpa (2.0 kgf/cm2) or more than 3.14 Mpa (32 kgf/cm2)
 10 to 14 V
H31-19 (TAM) - H34-28 (E2)
 Y - BR
 Ambient temperature sensor signal
 Ignition switch: ON
at 25°C (77°F)
 1.8 to 2.2 V
H31-19 (TAM) - H34-28 (E2)
 Y - BR
 Ambient temperature sensor signal
 Ignition switch: ON
at 40°C (104°F)
 1.2 to 1.6 V
H33-14 (CLK) - Body ground
 G - Body ground
 Compressor operation signal
 Ignition switch: ON
 Pulse generation
(See waveform A)
H33-15 (ITE) - Body ground
 W - Body ground
 Compressor operation signal
 Ignition switch: ON
 Pulse generation
(See waveform B)
H33-16 (ETI) - Body ground
 Y - Body ground
 Compressor operation signal
 Ignition switch: ON
 Pulse generation
(See waveform C)
H33-18 (STB) - Body ground
 B - body ground
 Compressor operation signal
 Ignition switch: ON
 10 to 14 V
H33-18 (STB) - Body ground
 B - Body ground
 Compressor operation signal
 Ignition switch: OFF
 Below 1 V
H31-4 (WP) - Body ground
 L - Body ground
 Water pump operation signal
 Not operate the heater water pump
 10 to 14 V
H31-4 (WP) - Body ground
 L - Body ground
 Water pump operation signal
 Operate the heater water pump
 Below 1 V

  1. E110722E01
    Waveform A:

    1. Measure the waveform between terminal CLK (H33-14) of the hybrid vehicle control ECU and body ground.

      OK:
      Waveform appears as shown in the illustration.

      HINT:
      Waveform cycle varies with the communication contents.

  2. E110723E02
    Waveform B:

    1. Measure the waveform between terminal ITE (H33-15) of the hybrid vehicle control ECU and body ground.

      OK:
      Waveform appears as shown in the illustration.

      HINT:
      Waveform cycle varies with the communication contents.

  3. E110724E02
    Waveform C:

    1. Measure the waveform between terminal ETI (H33-16) of the hybrid vehicle control ECU and body ground.

      OK:
      Waveform appears as shown in the illustration.

      HINT:
      Waveform cycle varies with the communication contents.


INTEGRATION CONTROL & PANEL ASSEMBLY
E068550E01

HINT:
Check from the rear of the connector with it connected to the integration control & panel assembly.

Terminal No.
(Symbols)
 Wiring color
 Terminal Description
 Condition
 Specification
C4-1 (+B) - C4-7 (GND)
 O - W-B
 Main power supply
 Always
 10 to 14 V
C4-2 (ACC) - C4-7 (GND)
 GR - W-B
 ACC power supply
 Ignition switch: ACC
 10 to 14 V
C4-4 (LP) - C4-7 (GND)
 P - W-B
 Security indicator
 Security: Operate
 10 to 14 V
C4-5 (MPX+) - C4-7 (GND)
 L - W-B
 Terminal for BEAN
 Ignition switch: ON
 Pulse generation
C4-7 (GND) - Body ground
 W-B - Body ground
 Ground for power supply
 Always
 Below 1 V
C4-8 (ILL+) - C4-14 (ILL-)
 G - W
 Power supply for illumination
 Dimmer switch: OFF
 Below 1 V
C4-8 (ILL+) - C4-14 (ILL-)
 G - W
 Power supply for illumination
 Dimmer switch: TAIL or HEAD
 10 to 14 V
C4-9 (IG+) - C4-7 (GND)
 LG - W-B
 IG power supply
 Ignition switch: ON
 10 to 14 V
C4-11 (F) - C4-7 (GND)
 V - W-B
 Hazard switch
 Hazard switch: OFF
 10 to 14 V
C4-11 (F) - C4-7 (GND)
 V - W-B
 Hazard switch
 Hazard switch: ON
 Below 1 V
C4-12 (MPX-) - C4-7 (GND)
 R - W-B
 Terminal for BEAN
 Ignition switch: ON
 Pulse generation
C4-14 (ILL-) - Body ground
 W - Body ground
 Ground for illumination
 Always
 Below 1 V

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