P0720
P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)
Description
The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of the
CVT output shaft and emits a pulse signal. The pulse signal is transmitted to the TCM, which converts it into vehicle speed.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1. CHECK DTC DETECTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select "Data Monitor" in "TRANSMISSION".
3. Start engine and maintain the following conditions for at least 12 consecutive seconds.
ACC PEDAL OPEN : More than 1.0/8
RANGE : "D" position
Driving location : Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
With GST
Follow the procedure "With CONSULT-III".
Is "P0720 VEH SPD SEN/CIR AT" detected?
YES - Go to "Diagnosis Procedure".
NO - Check intermittent incident. Refer to Intermittent Incident.
Diagnosis Procedure
1. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR)
With CONSULT-III
Check the pulse when vehicle drive.
Is the inspection result normal?
YES - GO TO 11.
NO - GO TO 2.
2. CHECK POWER AND SENSOR GROUND
1. Turn ignition switch OFF.
2. Disconnect output speed sensor (secondary speed sensor) connector.
3. Turn ignition switch ON.
4. Check voltage between output speed sensor (secondary speed sensor) vehicle side harness connector terminals.
5. Check voltage between output speed sensor (secondary speed sensor) vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES - GO TO 3.
NO-1(Battery voltage is not supplied between terminals 1 and 3,
terminal 3 and ground) - GO TO 6.
NO-2(Battery voltage is not supplied between terminals 1 and 3 only) - GO TO 8.
3. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace damaged parts.
4. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR)(PART 1)
Check continuity between TCM vehicle side harness connector terminal and output speed sensor (secondary speed sensor) vehicle side harness connector terminal.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace damaged parts.
5. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (PART 2)
Check continuity between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES - GO TO 10.
NO - Repair or replace damaged parts.
6. CHECK HARNESS BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (POWER) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R vehicle side harness connector terminal and output speed sensor (secondary speed sensor) vehicle side harness connector terminal.
Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace damaged parts.
7. CHECK HARNESS BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (POWER) (PART 2)
Check continuity between IPDM E/R vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES - Check the following. If NG, repair or replace damaged parts.
- Harness for short or open between ignition switch and IPDM E/R
- 10A fuse (No. 34, located in IPDM E/R)
- Ignition switch
NO - Repair or replace damaged parts.
8. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM vehicle side harness connector terminal and output speed sensor (secondary speed sensor) vehicle side harness connector terminal.
Is the inspection result normal?
YES - GO TO 9.
NO - Repair or replace damaged parts.
9. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND) (PART 2)
Check continuity between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES - GO TO 10.
NO - Repair or replace damaged parts.
10. CHECK TCM
1. Replace with the same type of TCM. Refer to Exploded View.
2. Perform "DTC CONFIRMATION PROCEDURE". Refer to P0720.
Is "P0720 VEH SPD SEN/CIR AT" detected?
YES - Replace the secondary speed sensor. Refer to Exploded View.
NO - Replace TCM. Refer to Exploded View.
11. DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - Replace TCM. Refer to Exploded View.
NO - Repair or replace damaged parts.