P0720
Code No. P0720: Output Shaft Speed Sensor System
DESCRIPTIONS OF MONITOR METHODS
- With the vehicle speed more than 20 km/h (12.4 mph), when the vehicle speed is decelerated by 20 km/h (12.4 mph) or more in 0.05 seconds
MONITOR EXECUTION
- Vehicle speed 20 km/h (12.4 mph) or more.
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- P0712: Malfunction of the transmission fluid temperature sensor (Short circuit)
- P0713: Malfunction of the transmission fluid temperature sensor (Open circuit)
- P0731: Malfunction of the 1st gear incorrect ratio
- P0732: Malfunction of the 2nd gear incorrect ratio
- P0733: Malfunction of the 3rd gear incorrect ratio
- P0734: Malfunction of the 4th gear incorrect ratio
- P0735: Malfunction of the 5th gear incorrect ratio
- P0729: Malfunction of the 6th gear incorrect ratio
- P0736: Malfunction of the Reverse gear incorrect ratio
- P0742: Malfunction of the Torque converter clutch system (Stuck on)
- P0846: Malfunction of the 2-6 brake pressure switch system
- P0876: Malfunction of the High clutch pressure switch system
- P0988: Malfunction of the Low-reverse brake pressure switch system
- P0893: Malfunction of the Interlock detection
- P1705: Malfunction of the Throttle position sensor information (engine)
- P1773: Malfunction of the ABS information (ASC)
Sensor (The sensor below is determined to be normal)
- Transmission fluid temperature sensor
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS
Check Conditions
- Vehicle speed: 20 km/h (12.4 mph) or more.
- Vehicle speed signal from ABS: more than -20 km/h (-12.4 mph)/0.05 seconds.
Judgment Criteria
- Rapid vehicle speed change: -20 km/h (-12.4 mph)/0.05 second or less. (2 seconds)
Check Conditions
- Vehicle speed signal from ABS: 20 km/h (12.4 mph) or more.
Judgment Criteria
- Vehicle speed: 5 km/h (3.1 mph) or less. (2.5 seconds)
OBD-II DRIVE CYCLE PATTERN
Drive with the vehicle speed 20 km/h (12.4 mph).
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:)
- Malfunction of the output shaft speed sensor system circuit
- Damaged harness or connector
- Malfunction of the output shaft speed sensor
- Malfunction of the TCM
- Malfunction of the output shaft speed sensor rotor (A/T assembly)
DIAGNOSIS
STEP 1. Check the TCM terminal voltage and frequency.
[C-37 TCM connector (vehicle side, connected)]
Check that the voltage between C-37 terminal No. 48 and C-38 terminal No. 13 or C-38 terminal No. 26 is 0 V, and then check the frequency of C-37 terminal No. 37.
- At D range, vehicle speed is 30 km/h (19 mph): Approx. 588 Hz
Q. Is the check result normal?
YES Go to Step 6.
NO Go to Step 2.
STEP 2. Check the power supply and sensor ground.
[B-108 output shaft speed sensor connector (vehicle side, disconnected)]
- With the ignition switch ON: Terminal No. 1 to No. 3 -> Battery positive voltage
Q. Is the check result normal?
YES Go to Step 3.
NO Go to Step 4.
STEP 3. Check the wiring harness between the output shaft speed sensor and TCM.
Check for continuity between B-108 output shaft speed sensor terminals and C-37 TCM terminals.
NOTE:
Prior to the wiring harness inspection, check the intermediate connectors A-12 and repair that if necessary.
- Between B-108 terminal No. 2 and C-37 terminal No. 37: Continuity exists.
When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.
Q. Is the check result normal?
YES Replace the output shaft speed sensor with the one of the same transaxle of the same model. Then go to Step 7.
NO Repair or replace the failure section, and then go to Step 6.
STEP 4. Check the path between the ignition switch and the output shaft speed sensor.
- Check the wiring harness for an open/short circuit between the ignition switch and B-108 output shaft speed sensor connector terminal No. 1.
- Check for a blown fuse.
Q. Is the check result normal?
YES Go to Step 5.
NO Repair or replace the failure section.
STEP 5. Check the wiring harness between the output shaft speed sensor and TCM.
Check for continuity between B-108 output shaft speed sensor terminals and C-37 TCM terminals.
NOTE:
Prior to the wiring harness inspection, check the intermediate connectors A-12 and repair that if necessary.
- Between B-108 terminal No. 1 and C-37 terminal No. 48: Continuity exists.
When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.
Q. Is the check result normal?
YES Go to Step 8.
NO Repair or replace the failure section.
STEP 6. Drive the vehicle for a while.
Check that the normal code is displayed.
Q. Is the check result normal?
YES The procedure is complete.
NO Replace the TCM.
STEP 7. After replacing the output shaft speed sensor, drive the vehicle for a while, and then check the DTC again.
Q. Is the check result normal?
YES Replace the output shaft speed sensor.
NO Replace the TCM. Then go to Step 9.
STEP 8. Check the TCM connector pin terminal and the connection status.
Q. Is there a failure point?
YES Repair or replace the failure section.
NO Replace the TCM.
STEP 9. Diagnostic trouble code recheck.
1. Erase the diagnostic trouble code.
2. Drive the vehicle at 20 km/h (12.4 mph) or more.
3. Check if the diagnostic trouble code is set.
Q. Is the diagnostic trouble code set?
YES Remove the A/T. Carry out the internal check and repair the defective part (the output shaft speed sensor rotor may be defective).
NO The procedure is complete.