Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT SHIFT LOCK CONTROL ECU

HINT:

If the results of the following inspections are as specified but a malfunction has occurred, replace the transmission floor shift assembly.

(a) Inspect wire harness:

(1) Disconnect the shift lock control ECU connector.

(2) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

4 (STP) - Body ground

Brake pedal depressed

11 to 14 V

Brake pedal released

Below 1 V

5 (IG) - Body ground

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

If the result is not as specified, repair or replace the shift lock control ECU wire harness.

*a

Front view of wire harness connector

(to Shift Lock Control ECU)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (E) - Body ground

Always

Below 1 Ω

If the result is not as specified, repair or replace the shift lock control ECU wire harness.

*a

Front view of wire harness connector

(to Shift Lock Control ECU)

(b) Inspect shift lock solenoid:

(1) Disconnect the shift lock solenoid connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (P) - 3 (E2)

Shift lever in P

10 kΩ or higher

Shift lever not in P

Below 1 Ω

If the result is not as specified, replace the transmission floor shift assembly.

If the shift lock does not operate when the power source of the transmission floor shift assembly is normal and the resistance between body ground and the shift lock solenoid is as specified, replace the transmission floor shift assembly.

*a

Front view of wire harness connector

(to Shift Lock Solenoid)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (SLS+) - 2 (SLS-)

Always

112 Ω

If the result is not as specified, replace the transmission floor shift assembly.

If the shift lock does not operate when the power source of the transmission floor shift assembly is normal and the resistance between body ground and the shift lock solenoid is as specified, replace the transmission floor shift assembly.

*a

Front view of wire harness connector

(to Shift Lock Solenoid)

2. INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the transmission control switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (IG) - 5 (S)

Shift lever in S, "+" or "-"

Below 1 Ω

Shift lever not in S, "+" or "-"

10 kΩ or higher

3 (SFTU) - 2 (E)

Shift lever held in "+"

(Up-shift)

Below 1 Ω

Shift lever not held in "+"

10 kΩ or higher

1 (SFTD) - 2 (E)

Shift lever held in "-"

(Down-shift)

Below 1 Ω

Shift lever not held in "-"

10 kΩ or higher

If the result is not as specified, replace the transmission floor shift assembly.

*a

Component without harness connected

(Transmission Control Switch (Transmission Floor Shift Assembly))

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

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

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