- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001D0XV |
| Model Year Start: 2019 | Model: Corolla Hatchback | Prod Date Range: [06/2018 - 11/2022] |
| Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P158549,P158649; Acceleration Sensor Circuit Internal Electronic Failure; 2019 - 2023 MY Corolla Corolla Hatchback [06/2018 - 11/2022] | ||
|
DTC |
P158549 |
Acceleration Sensor Circuit Internal Electronic Failure |
|
DTC |
P158649 |
Acceleration Sensor Circuit Range / Performance Internal Electronic Failure |
DESCRIPTION
The yaw rate and acceleration sensor is built into the airbag sensor assembly. The airbag sensor assembly sends yaw rate and acceleration sensor signals to the TCM via CAN communication. These signals are used for the neutral control. If a yaw rate and acceleration sensor circuit malfunction signal, yaw rate and acceleration sensor stuck signal or abnormal sensor output signal is received from the skid control ECU, a DTC will be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P158549 |
Acceleration Sensor Circuit Internal Electronic Failure |
Yaw rate and acceleration sensor circuit malfunction signal is received from the skid control ECU for 3 seconds or more (1-trip detection logic). |
|
Does not come on |
DTC stored |
SAE Code: P1585 |
|
P158649 |
Acceleration Sensor Circuit Range / Performance Internal Electronic Failure |
Yaw rate and acceleration sensor stuck signal or abnormal sensor output signal is received from the skid control ECU for 3 seconds or more (1-trip detection logic). |
|
Does not come on |
DTC stored |
SAE Code: P1586 |
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for 2 minutes or more.
- Turn the engine switch on (IG) and turn the Techstream on.
- Start the engine.
- Drive the vehicle while accelerating and decelerating repeatedly for several minutes.
- Stop the vehicle.
- Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
- Input the DTC: P158549 or P158649.
-
Check the DTC judgment result.
Techstream Display
Description
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 Confirmation Driving Pattern and check the DTC judgment result again.
WIRING DIAGRAM
Refer to DTC P158504.
Click here
![2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P158504; Acceleration Sensor Circuit System Internal Failure+](/t3Portal/stylegraphics/info.gif)
CAUTION / NOTICE / HINT
NOTICE:
-
Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.
Click here
-
Check that no DTCs are stored after performing initialization.
Click here
- Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
Read freeze frame data using the Techstream. The TCM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
|
1. |
CHECK DTC OUTPUT (IN ADDITION TO DTC P158549 OR P158649) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.
Powertrain > Transmission > Trouble Codes
(e) Read the DTCs using the Techstream.
HINT:
- If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
- If any DTCs other than P158549 or P158649 are output, troubleshoot those DTCs first.
|
Result |
Proceed to |
|---|---|
|
Only DTC P158549 or P158649 is output |
A |
|
DTC P158549 or P158649 and other DTCs are output |
B |
| B |
|
GO TO DTC CHART
|
|
|
2. |
INSPECT AIRBAG SENSOR ASSEMBLY (CHECK SENSOR INSTALLATION) |
(a) Check the airbag sensor assembly installation condition.
Click here
OK:
The airbag sensor assembly is not tilted and its installation bolts are tightened to the specified torque, the airbag sensor assembly bracket is not deformed and there are no foreign objects under the airbag sensor assembly.
| NG |
|
|
|
3. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIRBAG SENSOR ASSEMBLY) |
(a) Disconnect the I47 airbag sensor assembly connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I47-36 (IG2) - Body ground |
Engine switch on (IG) |
11 to 14 V |
(d) Turn the engine switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I47-33 (E1) - Body ground |
Always |
Below 1 Ω |
|
I47-32 (E2) - Body ground |
Always |
Below 1 Ω |
(f) Connect the I47 airbag sensor assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (AIRBAG SENSOR ASSEMBLY POWER SOURCE CIRCUIT) |
|
|
4. |
REPLACE AIRBAG SENSOR ASSEMBLY |
(a) Replace the airbag sensor assembly.
Click here
| NEXT |
|
|
5. |
REINSTALL OR REPLACE AIRBAG SENSOR ASSEMBLY |
(a) Reinstall or replace the airbag sensor assembly.
Click here
|
|
6. |
PERFORM INITIALIZATION |
(a) Perform Initialization.
Click here
|
|
7. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P158549 OR P158649) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Transmission > Clear DTCs
(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(g) Enter the following menus: Powertrain / Transmission / Trouble Codes.
(h) Read the DTCs.
Powertrain > Transmission > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC P158549 or P158649 is output |
B |
| A |
|
END |
|
|
8. |
REPLACE BRAKE ACTUATOR ASSEMBLY |
(a) Replace the brake actuator assembly.
Click here
|
|
9. |
PERFORM INITIALIZATION |
(a) Perform Initialization.
Click here
|
|
10. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P158549 OR P158649) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Transmission > Clear DTCs
(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(g) Enter the following menus: Powertrain / Transmission / Trouble Codes.
(h) Read the DTCs.
Powertrain > Transmission > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC P158549 or P158649 is output |
B |
| A |
|
END |
|
|
11. |
REPLACE TCM |
(a) Replace the TCM.
Click here
| NEXT |
|
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here
for Initialization: Click here
|
|
|