Component Tests and General Diagnostics

INSPECTION OF RESISTANCE
Solenoid Valves
1. Disconnect the negative battery cable.
2. Remove the air cleaner assembly.
3. Disconnect the solenoid valve connector.




4. Measure the resistance between terminals A through G and a ground.




5. If not correct, check the wiring harness or replace the solenoid valve(s), if necessary.
6. Connect the solenoid valve connector.
7. Install the air cleaner assembly.
8. Connect the negative battery cable.

INSPECTION OF OUTPUT DUTY
Pressure Control Solenoid




1. Connect the (+) terminal of a dwell meter to terminal 2H at the powertrain control module and the (-) terminal to a ground.
Set the dwell meter selector to the 4 cylinder position.
2. Engage the parking brake and use wheel chocks at the front and rear of the wheels.
3. Start the engine.
4. Depress the brake pedal firmly.
5. Shift the selector lever to D range.

NOTE: The dwell meter indicates the OFF duty ratio.




6. Verify the duty ratio by depressing and releasing the accelerator pedal.




NOTE: The relationship between the dwell angle (°) and duty ratio (%) is as shown above.




7. Depress the accelerator pedal slowly and verify that the duty ratio changes as shown in the graph.
8. If not as specified, check the powertrain control module and pressure control solenoid.

Torque Converter Clutch (TCC) Solenoid




1. Connect the (+) terminal of a dwell meter to terminal 2C of the powertrain control module and the (-) terminal to a ground.
2. Drive the vehicle.

NOTE: The dwell meter indicates the "OFF" duty ratio.




3. Verify the duty ratio in the TCC operation.

NOTE: See the above note for the dwell and duty relationship.
4. If not as specified, check the powertrain control module, and TCC solenoid valve.


INSPECTION OF WAVE FORM
1. Connect the oscilloscope to the powertrain control module at terminals 2C and 2H.
2. Inspect the wave form as shown in the figures below.







Typical Wave Forms