P0782

Diagnostic Chart:

Wiring Diagram:

When a gear is commanded On, the vehicle speed to input shaft speed ratio is monitored to assure the correct gear ratio is achieved. Shift solenoid 3 - performance indicates that another gear was commanded but the actual ratio driving the vehicle is equal to 3rd gear. This is a calculated value (input shaft speed/vehicle speed = gear ratio). Third gear clutch is turned Off by grounding circuit 1223 at the PCM.

DTC PARAMETERS

DTC P0782 is set when flagged on when the PCM has detected the following conditions for more than three seconds twice per ignition cycle:

^ 1st gear commanded by PCM.


^ No noise on input shaft or vehicle speed signals


^ Vehicle speed greater than 5 km/h (3 mph).


^ Input shaft speed greater than 224 rpm.


^ Speed ratio across the torque converter, engine speed versus input speed, less than 180. A speed ratio of 255 would be TCC On.


^ PCM calculated engine load value is greater than

200.


^ Input shaft to vehicle speed ratio equals 3rd gear.

TEST DESCRIPTION

Numbered steps below refer to numbered steps on chart.

1. Check for DTCs P0761, P0763 or P0764. They must be eliminated first as a possible cause of DTC or DTC P0782.

2. Check solenoid operation. Use solenoid quick check in test section. Listen and compare the noise of the 3rd gear solenoid to that of the other solenoids. The noise should be similar.


IMPORTANT: To check solenoid operation, command solenoid quick test using the Scan tool.

3. Problem could be a mechanical failure. This step begins internal diagnosis. Air check procedure is in "Test Section Diagnosis" found at the end of the DTC charts.


4. Cross leaks to/from 3rd clutch oil passages can cause 3rd clutch to be on at all times. Possible leak due to seals, gaskets, porosity etc.


5. As air pressure is applied and released, the clutch plates should also apply and release. If the clutch plates are moving normally, the problem is probably in the valvebody. If clutches are not moving correctly, the problem is in the end cover or an internal transaxle problem exists.


REPAIR VERIFICATION

Monitor DTC menu "Code Status" for "Pass Since Code Clear" and "Pass This Ignition Cycle." when both have passed, repair is verified.


Criteria for pass:


^ Engine running


^ Power present at solenoids and no active faults exist for this solenoid.


DIAGNOSTIC AIDS

This DTC may set or intermittent 3rd gear starts may be caused by a poor electrical connection at either the PCM, solenoid connector plate or UHJB terminals. Wiggling connectors while performing a solenoid quick test may help isolate the problem area.


This DTC will probably be accompanied by DTC P0741 - and DTC P0732.