Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Seat / Climate Control Seat System(for Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the G35 air conditioning amplifier assembly connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G35-2 (IG+) - Body ground	LA-GR - Body ground	Air conditioning amplifier power supply	Engine switch off	Below 1 V
G35-2 (IG+) - Body ground	LA-GR - Body ground	Air conditioning amplifier power supply	Engine switch on (IG)	11 to 14 V
G35-4 (GND) - Body ground	W-B - Body ground	Air conditioning amplifier ground	Always	Below 1 Ω

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G35-24 (LOUT) - Body ground

G - Body ground

Climate control blower control signal

Engine switch on (IG)
Climate control switch (radio and display receiver assembly) (for LH) on
(blower position)

Pulse generation

(See waveform)

G35-23 (ROUT) - Body ground

LG - Body ground

Climate control blower control signal

Engine switch on (IG)
Climate control switch (radio and display receiver assembly) (for RH) on
(blower position)

Pulse generation

(See waveform)

G35-14 (LIN1) - Body ground

LG - Body ground

Climate control switch signal

Engine switch on (IG)

Pulse generation

(1) Waveform (Reference):

Measurement Condition

Item	Content
Tester Connection	G35-24 (LOUT) - Body ground G35-23 (ROUT) - Body ground
Tool Setting	1 V/DIV., 0.5 ms/DIV.
Vehicle Condition	Engine switch on (IG) Climate control switch (radio and display receiver assembly) on (blower position)

CLIMATE CONTROL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the G20 climate control switch (radio and display receiver assembly) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G20-2 (IG+) - Body ground	GR - Body ground	Climate control switch power supply	Engine switch off	Below 1 V
G20-2 (IG+) - Body ground	GR - Body ground	Climate control switch power supply	Engine switch on (IG)	11 to 14 V
G20-6 (GND) - Body ground	W-B - Body ground	Climate control switch ground	Always	Below 1 Ω

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G20-8 (LIN1) - Body ground	LG - Body ground	Climate control switch signal	Engine switch on (IG)	Pulse generation

System Diagram

Climate Control Seat System(for Hv Model)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

System Diagram

Climate Control Seat System(for Hv Model)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual