P0721

DTC P0721

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

NOTE:

- If other DTC than P0721 is newly detected during this "DTC Confirmation Procedure", troubleshoot the newly detected DTC in first.
- Confirm that the following conditions are met in this procedure.

- Battery voltage > 10.5 V
- CVT fluid temperature at engine start ≥ 10 °C (50 °F)

1) Drive vehicle at more than 40 km/h (25 mile/h) for 10 sec.
2) Stop vehicle.
3) Push engine switch to change ignition mode to "OFF", and leave ignition mode in "OFF" for 10 sec.
4) Push engine switch to change ignition mode to "ON".
5) Repeat Step 1) through 2) twice.

DTC Troubleshooting


1. Was "CVT System Check" performed?
YES
Go to Step 2.
NO
Go to CVT System Check CVT System Check.
2. Secondary pulley speed sensor and its circuit check
Check secondary pulley speed sensor and its circuit according to Step 2 through 4 of P0722 DTC P0722.
Are they in good condition?
YES
Go to Step 3.
NO
Repair or replace defective parts.
3. Primary pulley speed sensor and its circuit check
Check primary pulley speed sensor and its circuit according to Step 2 through 4 of P0717 DTC P0717.
Are they in good condition?
YES
Go to Step 4.
NO
Repair or replace defective parts.
4. DTC check of ECM
Check DTC of ECM. DTC Check
Is there any DTC(s)?
YES
Go to troubleshooting for applicable DTC.
NO
Substitute a known-good TCM and recheck DTC. Service and Repair