Toyota 4Runner manuals

Toyota 4Runner: Transmission Control Switch Circuit

DESCRIPTION

After moving the shift lever to S, it is possible to switch the shift range between "1" (S1 range) and "5" (S5 range) using the transmission control switch.

Shifting to "+" once raises the shift range by one, and shifting to "-" once lowers the shift range by one.

WIRING DIAGRAM


PROCEDURE

1.

INSPECT TRANSMISSION CONTROL SWITCH

(a) Disconnect the F76 transmission control switch connector.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (IG) - 7 (S)

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

Below 1 Ω

2 (SFTU) - 5 (E)

Shift lever held in "+"

(Up-shift)

Below 1 Ω

1 (SFTD) - 5 (E)

Shift lever held in "-"

(Down-shift)

Below 1 Ω

3 (IG) - 7 (S)

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

10 kΩ or higher

2 (SFTU) - 5 (E)

Shift lever in S

10 kΩ or higher

1 (SFTD) - 5 (E)

Shift lever in S

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transmission Control Switch)


NG

REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)


OK

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND)

(a) Disconnect the F76 transmission control switch connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F76-3 (IG) - Body ground

Ignition switch ON

11 to 14 V

F76-3 (IG) - Body ground

Ignition switch off

Below 1 V

(c) Turn the ignition switch off.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F76-5 (E) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Transmission Control Switch)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the F50 ECM connector.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F50-24 (S) - Body ground

  • Ignition switch ON
  • Shift lever in S, "+" or "-"

11 to 14 V

F50-24 (S) - Body ground

  • Ignition switch ON
  • Shift lever not in S, "+" or "-"

Below 1 V

(c) Turn the ignition switch off.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F50-16 (SFTU) - Body ground

Shift lever held in "+"

(Up-shift)

Below 1 Ω

F50-22 (SFTD) - Body ground

Shift lever held in "-"

(Down-shift)

Below 1 Ω

F50-16 (SFTU) - Body ground

Shift lever in S

10 kΩ or higher

F50-22 (SFTD) - Body ground

Shift lever in S

10 kΩ or higher

Text in Illustration

*a

Rear view of wire harness connector

(to ECM)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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