K121 CVT CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM P170300 AT Solenoid Output Malfunction
DESCRIPTION
The ECM detects an erroneous downshift output to continuously variable transaxle or forward/rearward output malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P170300 | AT Solenoid Output Malfunction | ECM internal malfunction (1-trip detection logic). | ·
Transmission wire ·
Transmission valve body assembly (shift solenoid valve SL1, SL2, SLU, SC1, SC2 or SC3) ·
Wire harness or connector ·
ECM |
Comes on | Engine | B | SAE Code:
P1703 |
MONITOR DESCRIPTION
The ECM monitors the changes in the shift state from belt mode to gear mode and the forward and rearward drive output for abnormalities.
If the vehicle is being driven in gear mode when in the belt mode vehicle speed range and there is a difference between the forward and rearward drive command and result, the ECM detects a malfunction, illuminates the MIL and stores a DTC.
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Perform the D Position Shift Test inspection in Road Test. [*1]
- HINT:
-
[*1]: Normal judgment procedure.
-
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P170300.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
| N/A | ·
Unable to perform DTC judgment ·
Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Perform the universal trip to clear permanent DTCs.
·Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.
·Check that no DTCs are stored after performing initialization.
- HINT:
-
If any DTCs other than P170300 are output, perform troubleshooting for those DTCs first.
PROCEDURE
Read the DTCs using the GTS.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to Only P170300 is output A P170300 and other DTCs are output B
A
B
Pre-procedure1
Disconnect the C34 transmission wire connector.
Procedure1
| *a | Component without harness connected
(Transmission Wire) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 2 (SL1+) - 7 (SL1-) 20°C (68°F) 5.0 to 5.6 Ω 3 (SL2+) - 8 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω 4 (SLU+) - 9 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω 14 (SC1) - Body ground 20°C (68°F) 11 to 15 Ω 13 (SC2) - Body ground 20°C (68°F) 11 to 15 Ω 18 (SC3) - Body ground 20°C (68°F) 11 to 15 Ω 2 (SL1+) or 7 (SL1-) - Body ground and other terminals Always 10 kΩ or higher 3 (SL2+) or 8 (SL2-) - Body ground and other terminals Always 10 kΩ or higher 4 (SLU+) or 9 (SLU-) - Body ground and other terminals Always 10 kΩ or higher 14 (SC1) - Other terminals Always 10 kΩ or higher 13 (SC2) - Other terminals Always 10 kΩ or higher 18 (SC3) - Other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
Post-procedure1
Connect the C34 transmission wire connector.
OK
NG
Pre-procedure1
Disconnect the C71 ECM connector.
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C71-56 (SL1+) - C71-57 (SL1-) 20°C (68°F) 5.0 to 5.6 Ω C71-7 (SL2+) - C71-6 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω C71-30 (SLU+) - C71-31 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω C71-3 (SC1) - Body ground 20°C (68°F) 11 to 15 Ω C71-2 (SC2) - Body ground 20°C (68°F) 11 to 15 Ω C71-1 (SC3) - Body ground 20°C (68°F) 11 to 15 Ω C71-56 (SL1+) or C71-57 (SL1-) - Body ground and other terminals Always 10 kΩ or higher C71-7 (SL2+) or C71-6 (SL2-) - Body ground and other terminals Always 10 kΩ or higher C71-30 (SLU+) or C71-31 (SLU-) - Body ground and other terminals Always 10 kΩ or higher C71-3 (SC1) - Other terminals Always 10 kΩ or higher C71-2 (SC2) - Other terminals Always 10 kΩ or higher C71-1 (SC3) - Other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
Post-procedure1
Connect the C71 ECM connector.
OK
NG
- HINT:
-
for M20C-FKS:
-
for M20D-FKS:
- Result:
Proceed to NEXT
NEXT
for Registration: Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>REGISTRATION202304,999999,_52,_138176,_0584691,RM1000000029HF6,
for Initialization: Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>INITIALIZATION202304,202405,_52,_138176,_0584691,RM1000000029HF7,202405,202409,_52,_138176,_0584691,RM100000002JGMX,202409,999999,_52,_138176,_0584691,RM100000002NRHB,
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to NEXT
NEXT
for Registration: Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>REGISTRATION202304,999999,_52,_138176,_0584691,RM1000000029HF6,
for Initialization: Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>INITIALIZATION202304,202405,_52,_138176,_0584691,RM1000000029HF7,202405,202409,_52,_138176,_0584691,RM100000002JGMX,202409,999999,_52,_138176,_0584691,RM100000002NRHB,