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 |
|
*a |
Component without harness connected (Transmission Control Switch) |
| NG | .gif) |
REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY) |
|
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|
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 |
|
*a |
Front view of wire harness connector (to Transmission Control Switch) |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
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 |
|
11 to 14 V |
|
F50-24 (S) - Body ground |
|
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 |
|
*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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