Lexus NX manuals

Lexus NX: Transmission Control Switch Circuit

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (hybrid / Battery Control) / Hybrid Control System / Transmission Control Switch Circuit

DESCRIPTION

When the shift lever is in S, different ranges can be chosen using the floor shift sequential gate.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM (SPORTS MODE)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Sports Mode.

Powertrain > Hybrid Control > Data List

Tester Display

Sports Mode

(d) Read the value displayed on the Techstream.

Powertrain > Hybrid Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Sports Mode

Sports shift signal

ON or OFF

Shift lever in S: ON

Shift lever not in S position: OFF

Result

Proceed to

The Techstream display changes according to the shift lever operation.

A

The Techstream display does not change according to the shift lever operation.

B

(e) Turn the power switch off.

B

GO TO STEP 4

A

2.

READ VALUE USING TECHSTREAM (SPORT UP SHIFT SENS STATE, SPORT DWN SHIFT SENS STATE)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Sport Up Shift Sens State, Sport Dwn Shift Sens State.

Powertrain > Hybrid Control > Data List

Tester Display

Sport Up Shift Sens State

Sport Dwn Shift Sens State

(d) Read the value displayed on the Techstream.

Powertrain > Hybrid Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Sport Up Shift Sens State

Sports shift UP signal

ON or OFF

Shift lever in "+" operated:

ON

Shift lever in S not operated:

OFF

Sport Dwn Shift Sens State

Sport shift DOWN signal

ON or OFF

Shift lever in "-" operated:

ON

Shift lever in S not operated:

OFF

Result

Proceed to

The Techstream display changes according to the transmission control switch (shift lever assembly) operation.

A

The Techstream display does not change according to the transmission control switch (shift lever assembly) operation.

B

(e) Turn the power switch off.

B

GO TO STEP 7

A

3.

CHECK FOR INTERMITTENT PROBLEMS

Click here

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

4.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Disconnect the I23 transmission control switch (shift lever assembly) connector.

Click here

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I23-4 (IG) - Body ground

Power switch on (IG)

11 to 14 V

I23-4 (IG) - Body ground

Power switch off

Below 1 V

*a

Front view of wire harness connector

(to Transmission Control Switch (Shift Lever Assembly))

(c) Turn the power switch off.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I23-2 (E) - Body ground

Power switch off

Below 1 Ω

(e) Reconnect the I23 transmission control switch (shift lever assembly) connector.

NG

CHECK POWER SOURCE CIRCUIT
OK

5.

INSPECT TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY)

(a) Disconnect the I23 transmission control switch (shift lever assembly) connector.

(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I23-4 (IG) - I23-5 (S)

Shift lever in S

Shift lever held in "+" or "-"

Below 1 Ω

I23-1 (SFTD) - I23-2 (E)

Shift lever held in "+"

Below 1 Ω

I23-3 (SFTU) - I23-2 (E)

Shift lever held in "-"

Below 1 Ω

I23-4 (IG) - I23-5 (S)

Shift lever in any position except S

10 kΩ or higher

I23-1 (SFTD) - I23-2 (E)

Shift lever in S

10 kΩ or higher

I23-3 (SFTU) - I23-2 (E)

Shift lever in S

10 kΩ or higher

*a

Component without harness connected

(Transmission Control Switch (Shift Lever Assembly))

(c) Reconnect the I23 transmission control switch (shift lever assembly) connector.

NG

REPLACE TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY)

OK

6.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY))

(a) Disconnect the I116 hybrid vehicle control ECU connector.

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

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

(c) Measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I116-1 (M) - Body ground

Power switch on (IG) S, "+" and "-"

11 to 14 V

I116-1 (M) - Body ground

Power switch on (IG) Except S, "+" and "-"

Below 1 V

NOTICE:

If the power switch is turned on (IG) with the hybrid vehicle control ECU connector disconnected, other DTCs will be stored. After performing the inspection, clear the DTCs.

(d) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-9 (SFTU) - Body ground

Shift lever in S

Shift lever held in "+"

Below 1 Ω

I116-8 (SFTD) - Body ground

Shift lever in S

Shift lever held in "-"

Below 1 Ω

I116-9 (SFTU) - Body ground

Shift lever in S

10 kΩ or higher

I116-8 (SFTD) - Body ground

Shift lever in S

10 kΩ or higher

(e) Turn the power switch off.

(f) Reconnect the I116 hybrid vehicle control ECU connector.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

INSPECT TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY)

(a) Disconnect the I23 transmission control switch (shift lever assembly ) connector.

Click here

(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I23-1 (SFTD) - I23-2 (E)

Shift lever held in "+"

Below 1 Ω

I23-3 (SFTU) - I23-2 (E)

Shift lever held in "-"

Below 1 Ω

I23-1 (SFTD) - I23-2 (E)

Shift lever in S

10 kΩ or higher

I23-3 (SFTU) - I23-2 (E)

Shift lever in S

10 kΩ or higher

*a

Component without harness connected

(to Transmission Control Switch (Shift Lever Assembly))

(c) Reconnect the I23 transmission control switch (shift lever assembly ) connector.

NG

REPLACE TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY)

OK

8.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH (SHIFT LEVER ASSEMBLY) - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the I116 hybrid vehicle control ECU connector.

(b) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-9 (SFTU) - Body ground

Shift lever in S

Shift lever held in "+"

Below 1 Ω

I116-8 (SFTD) - Body ground

Shift lever in S

Shift lever held in "-"

Below 1 Ω

I116-9 (SFTU) - Body ground

Shift lever in S

10 kΩ or higher

I116-8 (SFTD) - Body ground

Shift lever in S

10 kΩ or higher

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

(c) Reconnect the I116 hybrid vehicle control ECU connector.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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