RM36D0EC _52 Drivetrain _138817 K121F CVT _0596468 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM J

K121F CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  Transmission Control Switch Circuit  


DESCRIPTION

After moving the shift lever to M, it is possible to change the shift range between M1 and M10 using the shift lever. Moving the shift lever to "+" once raises the shift range by one, and moving the shift lever to "-" lowers the shift range by one.

WIRING DIAGRAM

C488702E31
0.229,0.552 1.177,1.26 0.948,0.708 10 false from ECU-IGR NO. 2 Fuse 1.719,2.646 3.771,3.188 2.052,0.542 10 false Shift Lock Control Unit Assembly (Transmission Control Switch) 1.719,2.49 2.031,2.688 0.313,0.198 10 false G23 2.073,0.49 2.385,0.688 0.313,0.198 10 false IG 2.063,1.854 2.375,2.042 0.313,0.188 10 false E 3.271,0.5 3.583,0.688 0.313,0.188 10 false S 3.031,1.177 3.646,1.375 0.615,0.198 10 false SFTU 3.031,1.854 3.646,2.052 0.615,0.198 10 false SFTD 5.521,0.5 5.906,0.688 0.385,0.188 10 false SFT 5.51,1.167 6.125,1.365 0.615,0.198 10 false SFTU 5.521,1.854 6.135,2.052 0.615,0.198 10 false SFTD 5.531,2.5 6.688,2.74 1.156,0.24 10 false A116*1, A125*2 5.531,2.677 5.938,3.292 0.406,0.615 10 false ECM 1.854,0.49 2.01,0.688 0.156,0.198 10 false 4 1.865,1.854 2.177,2.052 0.313,0.198 10 false 2 3.5,1.854 3.813,2.052 0.313,0.198 10 false 1 3.5,1.177 3.813,1.375 0.313,0.198 10 false 3 3.51,0.5 3.823,0.698 0.313,0.198 10 false 5 5.25,0.49 5.563,0.688 0.313,0.198 10 false 94 5.25,1.167 5.563,1.365 0.313,0.198 10 false 79 5.25,1.854 5.563,2.052 0.313,0.198 10 false 78 6.25,1.01 6.708,1.208 0.458,0.198 10 false 12 V 6.25,1.688 6.708,1.885 0.458,0.198 10 false 12 V 0.208,3.375 2.813,3.573 2.604,0.198 10 false *2: for GTMC Made 0.198,3.052 2.802,3.25 2.604,0.198 10 false *1: for SFTM Made

CAUTION / NOTICE / HINT

NOTICE:
·

Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>PRECAUTION

·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.CHECK DTC OUTPUT
a.

Read the DTCs using the GTS.

Powertrain > Engine > Trouble Codes
50001 372

Result:
Result Proceed to
DTCs are not output A
DTCs are output B



A

2.READ VALUE USING GTS (SHIFT SW STATUS (S RANGE))

B

GO TO DTC CHART

2.READ VALUE USING GTS (SHIFT SW STATUS (S RANGE))
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Shift SW Status (S Range) Transmission control switch status OFF or ON
·

ON: Shift lever in M, "+" or "-"

·

OFF: Shift lever not in M, "+" or "-"


-
Powertrain > Engine > Data List
Tester Display
Shift SW Status (S Range)
50003 372 27

Result:
Result Proceed to
Data List value is normal A
Data List value is not normal B



A

3.READ VALUE USING GTS (SPORT SHIFT UP SW AND SPORT SHIFT DOWN SW)

B

8.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)
3.READ VALUE USING GTS (SPORT SHIFT UP SW AND SPORT SHIFT DOWN SW)
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Sport Shift Up SW Sport shift up switch status OFF or ON
·

ON: Shift lever held in "+"

·

OFF: Shift lever not held in "+"


-
Sport Shift Down SW Sport shift down switch status OFF or ON
·

ON: Shift lever held in "-"

·

OFF: Shift lever not held in "-"


-
Powertrain > Engine > Data List
Tester Display
Sport Shift Up SW
Sport Shift Down SW
50003 372 26,25

Result:
Result Proceed to
Data List values are normal A
Data List values are not normal B



A

CHECK FOR INTERMITTENT PROBLEMS

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


B

4.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)
4.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)
a.
C239095C21
1.292,1.729 1.646,1.313 true 2.698,1.729 2.313,1.302 true 1.979,1.729 1.958,1.333 true 0.198,0.167 0.51,0.365 0.313,0.198 10 *a 1.969,1.781 2.125,1.979 0.156,0.198 10 E 2.604,1.781 3.219,1.979 0.615,0.198 10 SFTD 1.104,1.771 1.719,1.969 0.615,0.198 10 SFTU
*a Component without harness connected
(Shift Lock Control Unit Assembly (Transmission Control Switch))


Disconnect the G23 shift lock control unit assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (SFTU) - 2 (E) Shift lever held in "+" (Up shift) Below 1 Ω
3 (SFTU) - 2 (E) Shift lever not held in "+" (Up shift) 10 kΩ or higher
1 (SFTD) - 2 (E) Shift lever held in "-" (Down shift) Below 1 Ω
1 (SFTD) - 2 (E) Shift lever not held in "-" (Down shift) 10 kΩ or higher



c.

Connect the G23 shift lock control unit assembly connector.


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)

NG

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

Click hereDrivetrain>K121F (CVT)>SHIFT LEVER>REMOVAL


5.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)
a.

Disconnect the G23 shift lock control unit assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G23-2 (E) - Body ground Always Below 1 Ω



c.

Connect the G23 shift lock control unit assembly connector.


Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)

6.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)
a.

for SFTM Made:

Disconnect the A116 ECM connector.


b.

for GTMC Made:

Disconnect the A125 ECM connector.


c.

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

Standard Resistance (for SFTM Made):
Tester Connection Condition Specified Condition
A116-79 (SFTU) - Body ground Shift lever held in "+" (Up shift) Below 1 Ω
A116-79 (SFTU) - Body ground Shift lever not held in "+" (Up shift) 10 kΩ or higher
A116-78 (SFTD) - Body ground Shift lever held in "-" (Down shift) Below 1 Ω
A116-78 (SFTD) - Body ground Shift lever not held in "-" (Down shift) 10 kΩ or higher


Standard Resistance (for GTMC Made):
Tester Connection Condition Specified Condition
A125-79 (SFTU) - Body ground Shift lever held in "+" (Up shift) Below 1 Ω
A125-79 (SFTU) - Body ground Shift lever not held in "+" (Up shift) 10 kΩ or higher
A125-78 (SFTD) - Body ground Shift lever held in "-" (Down shift) Below 1 Ω
A125-78 (SFTD) - Body ground Shift lever not held in "-" (Down shift) 10 kΩ or higher



d.

for SFTM Made:

Connect the A116 ECM connector.


e.

for GTMC Made:

Connect the A125 ECM connector.


Result:
Proceed to
OK
NG



OK

7.REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

8.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)
a.
C239095C12
0.771,1.729 1.125,1.313 true 1.906,1.75 1.521,1.323 true 0.198,0.167 0.51,0.365 0.313,0.198 10 *a 1.906,1.802 2.375,2 0.469,0.198 10 IG 0.646,1.771 1.021,1.979 0.375,0.208 10 S
*a Component without harness connected
(Shift Lock Control Unit Assembly (Transmission Control Switch))


Disconnect the G23 shift lock control unit assembly 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 M, "+" or "-" Below 1 Ω
4 (IG) - 5 (S) Shift lever not in M, "+" or "-" 10 kΩ or higher



c.

Connect the G23 shift lock control unit assembly connector.


Result:
Proceed to
OK
NG



OK

9.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (POWER SOURCE)

NG

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

Click hereDrivetrain>K121F (CVT)>SHIFT LEVER>REMOVAL


9.INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (POWER SOURCE)
a.

Disconnect the G23 shift lock control unit assembly connector.


b.
C499331C01
0.167,1 0.583,1.25 0.417,0.25 2.375,1.885 2.021,1.385 true 0.219,0.188 0.531,0.385 0.313,0.198 10 false *a 0.26,1.042 0.573,1.24 0.313,0.198 10 false G23 2.375,1.948 2.688,2.146 0.313,0.198 10 false IG
*a Front view of wire harness connector (to Shift Lock Control Unit Assembly (Transmission Control Switch))


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

Standard Voltage:
Tester Connection Condition Specified Condition
G23-4 (IG) - Body ground Ignition switch ON 11 to 14 V
G23-4 (IG) - Body ground Ignition switch off Below 1 V



c.

Connect the G23 shift lock control unit assembly connector.


Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

NG

CHECK POWER SOURCE CIRCUIT (SHIFT LOCK CONTROL UNIT ASSEMBLY)

10.CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)
a.

for SFTM Made:

Disconnect the A116 ECM connector.


b.

for GTMC Made:

Disconnect the A125 ECM connector.


c.

Disconnect the G23 shift lock control unit assembly connector.


d.

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

Standard Resistance (for SFTM Made):
Tester Connection Condition Specified Condition
G23-5 (S) - A116-94 (SFT) Always Below 1 Ω
G23-5 (S) or A116-94 (SFT) - Body ground and other terminals Always 10 kΩ or higher


Standard Resistance (for GTMC Made):
Tester Connection Condition Specified Condition
G23-5 (S) - A125-94 (SFT) Always Below 1 Ω
G23-5 (S) or A125-94 (SFT) - Body ground and other terminals Always 10 kΩ or higher



e.

for SFTM Made:

Connect the A116 ECM connector.


f.

for GTMC Made:

Connect the A125 ECM connector.


g.

Connect the G23 shift lock control unit assembly connector.


Result:
Proceed to
OK
NG



OK

11.REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)