Lexus NX manuals

Lexus NX: Shift Paddle Switch Circuit

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

DESCRIPTION

When the shift lever is in S, the shift range position can be changed freely using the shift paddle switch of the transmission shift switch assembly.

WIRING DIAGRAM

PROCEDURE

1.

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 paddle switch RH operated:

ON

shift paddle switch RH not operated:

OFF

Sport Dwn Shift Sens State

Sport shift DOWN signal

ON or OFF

shift paddle switch LH operated:

ON

shift paddle switch LH not operated:

OFF

Result

Proceed to

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

A

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

B
A

CHECK FOR INTERMITTENT PROBLEMS

B

2.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU)

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

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

(c) Measure the resistance according to the value(s) in the table below when the shift paddle switch (transmission shift switch assembly) is moved to each position.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I116-9 (SFTU) - Body ground

Shift paddle switch RH (+) operated

Below 2.5 Ω

I116-8 (SFTD) - Body ground

Shift paddle switch LH (-) operated

Below 2.5 Ω

I116-9 (SFTU) - Body ground

Shift paddle switch RH (+) not operated

1 MΩ or higher

I116-8 (SFTD) - Body ground

Shift paddle switch LH (-) not operated

1 MΩ or higher

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

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

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

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

3.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

(a) Disconnect the I4 spiral cable sub-assembly connector.

*a

Front view of wire harness connector

(to Spiral Cable Sub-assembly)

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

Standard Resistance (Open):

Tester Connection

Condition

Specified Condition

I4-2 (ECC) - Body ground

Always

Below 1 Ω

(c) Reconnect the I4 spiral cable sub-assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly.

Click here

*a

Component without harness connected

(Spiral Cable Sub-assembly)

-

-

(b) Set the spiral cable sub-assembly to the center position.

Click here

(c) Measure the resistance between the terminals of the spiral cable sub-assembly according to the value(s) in the table below.

  1. After setting the spiral cable sub-assembly to the center position, rotate the spiral cable sub-assembly 2.5 times clockwise and measure the resistance. Then rotate the spiral cable sub-assembly 2.5 times counterclockwise and measure the resistance.
  2. After setting the spiral cable sub-assembly to the center position, rotate the spiral cable sub-assembly 2.5 times clockwise. Then while rotating the spiral cable sub-assembly 5 times counterclockwise, measure the resistance.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z17-1 (SUP) - I4-8 (SUP)

Always

Below 1 Ω

z17-3 (SDN) - I4-1 (SDN)

Always

Below 1 Ω

z17-4 (ECC) - I4-2 (ECC)

Always

Below 1 Ω

NOTICE:

As the spiral cable sub-assembly may break, do not rotate the spiral cable sub-assembly more than the specified amount.

(d) Install the spiral cable sub-assembly.

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

5.

INSPECT SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) LH

(a) Remove the shift paddle switch (transmission shift switch assembly) LH.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

SDN - ECC

Shift paddle switch LH (-) operated

Below 2.5 Ω

SDN - ECC

Shift paddle switch LH (-) not operated

1 MΩ or higher

*a

Component without harness connected

(Shift Paddle Switch (Transmission Shift Switch Assembly) LH)

(c) Install the shift paddle switch (transmission shift switch assembly) LH.

NG

REPLACE SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) LH

OK

6.

INSPECT SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) RH

(a) Remove the shift paddle switch (transmission shift switch assembly) RH.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

SUP - ECC

Shift paddle switch RH (+) operated

Below 2.5 Ω

SUP - ECC

Shift paddle switch RH (+) not operated

1 MΩ or higher

*a

Component without harness connected

(Shift Paddle Switch (Transmission Shift Switch Assembly) RH)

(c) Install the shift paddle switch (transmission shift switch assembly) RH.

NG

REPLACE SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) RH

OK

7.

INSPECT NO. 1 SWITCH WIRE

(a) Disconnect the z17 No. 1 switch wire connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

z17-3 (SDN) - z17-4 (ECC)

Shift paddle switch LH (-) operated

Below 2.5 Ω

z17-1 (SUP) - z17-4 (ECC)

Shift paddle switch RH (+) operated

Below 2.5 Ω

z17-3 (SDN) - z17-4 (ECC)

Shift paddle switch LH (-) not operated

1 MΩ or higher

z17-1 (SUP) - z17-4 (ECC)

Shift paddle switch RH (+) not operated

1 MΩ or higher

*a

Component without harness connected

(No. 1 Switch Wire)

(c) Reconnect the z17 No. 1 switch wire connector.

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR
NG

REPLACE NO. 1 SWITCH WIRE

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