DTC Troubleshooting

DTC Troubleshooting: P1899 (100), P0780 (100)

DTC P1899:

CVT Drive Pulley Pressure Control Valve Stuck OFF or CVT Driven Pulley Pressure Control Valve Stuck ON

DTC P0780:

Shift Error

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information Initial Inspection and Diagnostic Overview.
- Keep replacement solenoid valves on hand: the CVT drive pulley pressure control solenoid valve and the CVT driven pulley pressure control solenoid valve set.

1. Turn the ignition switch to ON (II).

2. Check for Pending or Confirmed DTCs with the HDS.

Are any other Pending or Confirmed DTCs indicated along with DTC P1899 and P0780?

YES -

Go to the indicated DTC's troubleshooting, and recheck.

NO -

Go to step 3.

3. Clear the DTC with the HDS.

4. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice).

5. Check the SOC in the DATA LIST with the HDS.

Does the SOC indicate more than 50%?

YES -

Go to step 6.

NO -

Start the engine with the shift lever in P or N, hold it at 3,500 rpm until the SOC indicates at least 50%, then go to step 6.

6. Shift the shift lever to D while pressing the brake pedal, and let the engine idle for at least 5 seconds.

7. Accelerate from a stop until the vehicle speed reaches 40-50 mph (65-80 km/h) on a flat road for at least 15 seconds. Do not release the accelerator during the test-drive.

8. Slow down to a stop, keep the shift lever in D while pressing the brake pedal, and let the engine idle for at least 5 seconds. Then return to the test-drive of step 7.

9. Check for Pending or Confirmed DTCs with the HDS.

Are DTC P0746, P0777, or P1899 and P0780 indicated?

YES -

The CVT drive pulley pressure control solenoid valve may be stuck OFF or the CVT driven pulley pressure control solenoid valve may be stuck ON:

- DTC P0746 is indicated, replace the CVT drive pulley pressure control solenoid valve CVT Drive Pulley Pressure Control Solenoid Valve Replacement (CVT).
- DTC P0777 is indicated, replace the CVT driven pulley pressure control solenoid valve CVT Driven Pulley Pressure Control Solenoid Valve Replacement (CVT).
- DTC P1899 and P0780 are indicated, replace the CVT drive pulley pressure control solenoid valve CVT Drive Pulley Pressure Control Solenoid Valve Replacement (CVT) and CVT driven pulley pressure control solenoid valve CVT Driven Pulley Pressure Control Solenoid Valve Replacement (CVT) as a set.

If any part was replaced, go to step 10.

NO -

Go to step 6, and repeat the test-drive. If the HDS does not indicate a DTC after the test-drive has been done four times, the problem was an intermittent failure; the system is OK at this time.

10. Turn the ignition switch to ON (II).

11. Clear the DTC with the HDS .

12. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice).

13. Shift the shift lever to D while pressing the brake pedal, and let the engine idle for at least 5 seconds.

14. Accelerate from a stop until the vehicle speed reaches 40-50 mph (65-80 km/h) on a flat road for at least 15 seconds. Do not release the accelerator during the test-drive.

15. Slow down to a stop, keep the shift lever in D while pressing the brake pedal, and let the engine idle for at least 5 seconds. Then return to the test-drive of step 14.

16. Check for Pending or Confirmed DTCs with the HDS.

Are DTC P1899 and P0780 indicated?

YES -

Replace the transmission.

NO -

Go to step 17.

17. Monitor the OBD STATUS for P1899 and P0780 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 16, go to the indicated DTC's troubleshooting.

NO -

If the HDS indicates FAILED, check for poor connections or loose terminals between the CVT drive pulley pressure control solenoid valve, the CVT driven pulley pressure control solenoid valve, and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 12.