Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Power Source Mode does not Change to ON (IG and ACC)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Access System With Push-button Start (for Start Function) / Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

If any of the following operations are performed, the certification ECU (smart key ECU assembly) receives a signal, and changes the power source mode.

  • With the electrical key transmitter sub-assembly in the cabin, the engine switch is pressed.
  • When the transmitter battery of the electrical key transmitter sub-assembly is depleted, the brake pedal is depressed with the electrical key transmitter sub-assembly held near the engine switch.
  • When the smart access system with push-button start has been canceled, the brake pedal is depressed with the electrical key transmitter sub-assembly held near the engine switch.
Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

Power source mode does not change to on (IG) or on (ACC)
Power Source Control
  • Start Switch1
  • Start Switch2
  • IG Relay Monitor (Inside)
  • ACC Relay Monitor
  • IG Relay Monitor (Outside)
  • Latch Circuit
  • Power Supply Condition
Starting Control
  • Ignition

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart access system with push-button start (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart access system with push-button start (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
  • If the smart access system with push-button start (for Start Function) has been canceled, enable the system before performing troubleshooting.

    Click here

  • Inspect the fuses of circuits related to this system before performing the following procedure.
  • Before replacing the certification ECU (smart key ECU assembly) or an electrical key transmitter sub-assembly, refer to smart access system with push-button start (for Start Function) Precaution.

    Click here

  • After completing repairs, confirm that the problem does not recur.

HINT:

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE

1.

CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

(a) Press a switch of the electrical key transmitter sub-assembly.

OK:

The electrical key transmitter sub-assembly LED illuminates.

NG

GO TO STEP 29

OK

2.

READ VALUE USING TECHSTREAM (KEY LOW BATTERY)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Access / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Access > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Key Low Battery

Transmitter battery depleted

No or Yes

No: Transmitter battery not depleted

Yes: Transmitter battery depleted

The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).
Body Electrical > Smart Access > Data List

Tester Display

Key Low Battery

OK:

"No" is displayed on the Techstream screen.

NG

REPLACE TRANSMITTER BATTERY

OK

3.

CHECK ENTRY LOCK OPERATION

(a) Check that the entry lock and unlock functions operate on each door.

Click here

HINT:

If the door control receiver is defective, code verification does not begin in the cabin and the entry lock and unlock functions do not operate.

Result

Proceed to

Entry functions operate normally for all doors (w/ Wireless Charging System)

A

Entry functions operate normally for all doors (w/o Wireless Charging System)

B

An entry function does not operate normally for a door

C
B

GO TO STEP 5

C

GO TO OTHER PROBLEM

A

4.

CHECK WIRELESS CHARGING SYSTEM

(a) Wireless charging system off.

Click here

(b) Check that interior certification is performed.

Click here

Result

Proceed to

Interior certification is not performed normally

A

Interior certification is performed normally

B
B

GO TO WIRELESS CHARGING SYSTEM

A

5.

CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function)

(a) Remove the transmitter battery from the electrical key transmitter sub-assembly.

(b) With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

OK:

The power source mode changes.

HINT:

If the power source mode changes, the cabin verification is malfunctioning.

*1

Engine Switch

*2

Electrical Key Transmitter Sub-assembly

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B
B

GO TO STEP 22

A

6.

CHECK WAVE ENVIRONMENT

(a) Install the transmitter battery to the electrical key transmitter sub-assembly.

Click here

(b) Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor) and perform an smart access system with push-button start check.

Click here

NOTICE:

Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor).

(c) Bring the electrical key transmitter sub-assembly near the No. 2 indoor electrical key antenna assembly (rear floor) and perform an smart access system with push-button start check.

Click here

NOTICE:

Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 2 indoor electrical key antenna assembly (rear floor).

HINT:

Check that the customize setting "Ignition Available Area" is set to "All".

(d) Bring the electrical key transmitter sub-assembly near the No. 3 indoor electrical key antenna assembly (inside luggage compartment) and perform an smart access system with push-button start check.

Click here

NOTICE:

Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

HINT:

Check that the customize setting "Ignition Available Area" is set to "All".

HINT:

  • As the effect of wave interference decreases by moving the electrical key transmitter sub-assembly close to each indoor electrical key antenna assembly, it may be possible to check whether wave interference is the cause of the problem.
  • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
  • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
  • If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

OK:

The engine starts when the electrical key transmitter sub-assembly is held near each indoor electrical key antenna assembly and the engine switch is pressed with the brake pedal depressed.

OK

AFFECTED BY WAVE INTERFERENCE
NG

7.

CHECK FOR DTC (SMART ACCESS)

(a) Check for DTCs.

Body Electrical > Smart Access > Trouble Codes

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

8.

CHECK FOR DTC (POWER SOURCE CONTROL)

(a) Check for DTCs.

Body Electrical > Power Source Control > Trouble Codes

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

9.

CHECK KEY DIAGNOSTIC MODE

(a) Check the following antennas in key diagnostic mode.

Body Electrical > Smart Access > Utility

Tester Display

Communication Check(Key Diag Mode)

HINT:

  • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
  • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
  • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage compartment) is operating by the sounding of the buzzer.
  • When the wireless buzzer sounds for all indoor electrical key antenna assemblies, they can be judged as operating properly and a malfunction in the certification ECU (smart key ECU assembly), which performs verification, is suspected.
  • When the wireless buzzer does not sound for all indoor electrical key antenna assemblies, it can be judged that the certification ECU (smart key ECU assembly), which controls the indoor electrical key antenna assemblies, is malfunctioning.

(b) Check the No. 1 indoor electrical key antenna assembly (front floor).

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

*a

Inspection Point

(c) Check the No. 2 indoor electrical key antenna assembly (rear floor).

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

*a

Inspection Point

(d) Check the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

*a

Inspection Point

Result

Proceed to

The wireless buzzer does not sound for all indoor electrical key antenna assemblies

A

The wireless buzzer does not sound for only the No. 1 indoor electrical key antenna assembly (front floor)

B

The wireless buzzer does not sound for only the No. 2 indoor electrical key antenna assembly (rear floor)

C

The wireless buzzer does not sound for only the No. 3 indoor electrical key antenna assembly (inside luggage compartment)

D

The wireless buzzer sounds for all indoor electrical key antenna assemblies

E
A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

C

GO TO STEP 13

D

GO TO STEP 16

E

GO TO STEP 19

B

10.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))

(a) Using an oscilloscope, check the waveform.

*a

Front view of wire harness connector

(to No. 1 Indoor Electrical Key Antenna Assembly (Front Floor))

*b

Waveform 1

*c

For 30 seconds after closing any door

*d

After 30 seconds or more have elapsed since any door closed

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

J61-1 (ANTE5) - J61-3 (CLGB)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

11.

REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)

(a) Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one.

Click here

NEXT

12.

CHECK POWER SOURCE MODE

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Press the engine switch with the brake pedal released and check that the power source mode changes.

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B
A

END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) WAS DEFECTIVE)
B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

13.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR))

(a) Using an oscilloscope, check the waveform.

*a

Front view of wire harness connector

(to No. 2 Indoor Electrical Key Antenna Assembly (Rear Floor))

*b

Waveform 1

*c

For 30 seconds after closing any door

*d

After 30 seconds or more have elapsed since any door closed

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

J80-1 (ANTE6) - J80-3 (CLGB)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

14.

REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)

(a) Temporarily replace the No. 2 indoor electrical key antenna assembly (rear floor) with a new one.

Click here

NEXT

15.

CHECK POWER SOURCE MODE

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Press the engine switch with the brake pedal released and check that the power source mode changes.

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B
A

END (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR) WAS DEFECTIVE)
B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

16.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))

(a) Using an oscilloscope, check the waveform.

*A

w/o Rear No. 2 Seat

*B

w/ Rear No. 2 Seat

*a

Front view of wire harness connector

(to No. 3 Indoor Electrical Key Antenna Assembly (Inside Luggage Compartment))

*b

Waveform 1

*c

For 30 seconds after closing any door

*d

After 30 seconds or more have elapsed since any door closed

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

R20-1 (ANTE7) - R20-3 (CLGB)*1

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)

T9-1 (ANTE7) - T9-3 (CLGB)*2
  • *1: w/o Rear No. 2 Seat
  • *2: w/ Rear No. 2 Seat
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

17.

REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT)

(a) Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage compartment) with a new one.

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

NEXT

18.

CHECK POWER SOURCE MODE

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Press the engine switch with the brake pedal released and check that the power source mode changes.

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B
A

END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT) WAS DEFECTIVE)
B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

19.

READ VALUE USING TECHSTREAM (START SWITCH1, START SWITCH2)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Power Source Control / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Start Switch1

Engine switch 1 status

OFF or ON

OFF: Engine switch not pressed

ON: Engine switch pressed
  • If the engine switch is pressed for a short time, the display may not change.
  • Use this item to determine if the engine switch input signal is malfunctioning.

Start Switch2

Engine switch 2 status

OFF or ON

OFF: Engine switch not pressed

ON: Engine switch pressed
  • Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal.
  • Behaves the same way as engine switch 1.
Body Electrical > Power Source Control > Data List

Tester Display

Start Switch1

Start Switch2

OK:

The Techstream display changes correctly in response to the engine switch operation.

OK

USE SIMULATION METHOD TO CHECK

NG

20.

INSPECT ENGINE SWITCH

(a) Remove the engine switch.

Click here

(b) Inspect the engine switch.

Click here

NG

REPLACE ENGINE SWITCH

OK

21.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH)

(a) Disconnect the J41 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J41-23 (SSW1) - J14-5 (SS1)

Always

Below 1 Ω

J41-21 (SSW2) - J14-1 (SS2)

Always

Below 1 Ω

J41-11 (AGND) - J14-6 (AGND)

Always

Below 1 Ω

J41-23 (SSW1) or J14-5 (SS1) - Body ground

Always

10 kΩ or higher

J41-21 (SSW2) or J14-1 (SS2) - Body ground

Always

10 kΩ or higher

J41-11 (AGND) or J14-6 (AGND) - Body ground

Always

10 kΩ or higher
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

22.

CHECK KEY DIAGNOSTIC MODE

(a) Check the following antennas in key diagnostic mode.

Body Electrical > Smart Access > Utility

Tester Display

Communication Check(Key Diag Mode)

HINT:

  • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
  • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
  • It is possible to check if the transponder key amplifier built into the engine switch is operating by the sounding of the buzzer.

(b) Check the engine switch.

Face the logo side of the electrical key transmitter sub-assembly toward the engine switch, hold the electrical key transmitter sub-assembly near the engine switch and check that the wireless buzzer sounds.

*1

Engine Switch

*2

Electrical Key Transmitter Sub-assembly

Result

Proceed to

The wireless buzzer does not sound

A

The wireless buzzer sounds

B
B

REPLACE ENGINE SWITCH

A

23.

CHECK FOR DTC

(a) Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs.

Body Electrical > Power Source Control > Trouble Codes Body Electrical > Smart Access > Trouble Codes

Result

Proceed to

DTCs are not output

A

Smart access system with push-button start (for Start Function) DTCs are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

24.

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
OK

25.

CHECK HARNESS AND CONNECTOR (GROUND)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

26.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 2A and 2B instrument panel junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J41-16 (ACCD) - 2A-30

Always

Below 1 Ω

J41-17 (IG1D) - 2A-17

Always

Below 1 Ω

2B-3 - Body ground

Always

Below 1 Ω

J41-16 (ACCD) or 2A-30 - Body ground

Always

10 kΩ or higher

J41-17 (IG1D) or 2A-17 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

27.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2, IG1 NO. 3, ACC RELAY)

(a) Remove the instrument panel junction block assembly.

Click here

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

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-30 - 2B-3

20°C (68°F)

285.71 to 428.57 Ω

2A-17 - 2B-3

20°C (68°F)

142.86 to 214.29 Ω

2E-1 - 2A-40

Battery voltage applied between terminals 2A-30 and 2B-3

Below 1 Ω

Battery voltage not applied between terminals 2A-30 and 2B-3

10 kΩ or higher

2E-1 - 2A-35

Battery voltage applied between terminals 2A-17 and 2B-3

Below 1 Ω

Battery voltage not applied between terminals 2A-17 and 2B-3

10 kΩ or higher

2E-1 - 2D-12

Battery voltage applied between terminals 2A-17 and 2B-3

Below 1 Ω

Battery voltage not applied between terminals 2A-17 and 2B-3

10 kΩ or higher
NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

28.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Install the instrument panel junction block assembly.

Click here

(b) Reconnect the J41 certification ECU (smart key ECU assembly) connector.

(c) Measure the voltage while confirming the power source mode on the Data List.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

-

-
Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Supply Condition

Power supply state

All OFF, ACC ON, IG ON or ST ON

All OFF: Engine switch off

ACC ON: Engine switch on (ACC)

IG ON: Engine switch on (IG)

ST ON: Sending engine start request signal

-
Body Electrical > Power Source Control > Data List

Tester Display

Power Supply Condition

Standard Voltage:

Tester Connection

Condition

Specified Condition

J41-17 (IG1D) - Body ground

Engine switch off

1 V or less

Engine switch on (ACC)

1 V or less

Engine switch on (IG)

9 V or higher

J41-16 (ACCD) - Body ground

Engine switch off

1 V or less

Engine switch on (ACC)

8.5 V or higher

Engine switch on (IG)

8.5 V or higher
OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

29.

INSPECT TRANSMITTER BATTERY

(a) Inspect the transmitter battery.

Click here

NOTICE:

Do not wrap the lead wire ground a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

OK

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY
NG

REPLACE TRANSMITTER BATTERY

    Engine does not Start
    DESCRIPTION When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power so ...

    Power Source Mode does not Change to ON (IG)
    DESCRIPTION If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Can Communication System: Open in Bus 3 Main Bus Line
    DESCRIPTION There may be an open circuit in one of the bus 3 main lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the network gateway ECU is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 6 (CA3H) and 21 (CA3L) of network gateway ECU is 70 Ω or hig ...

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Rear Seatback Heater (for 60/40 Split Seat Type Lh Side): Installation
    INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the seat frame may injure your hands. PROCEDURE 1. INSTALL SEAT HEATER ASSEMBLY (w/o Rear No. 2 Seat) (a) Install the seat heater assembly to the separate type rear seatback cover with 10 new tag pins. 2. INSTALL SE ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2024 Copyright www.lexusrx.net
    0.0147