Pinpoint Test A: Control Solenoids
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- A1 ELECTRONIC DIAGNOSTICS
- Key in OFF position.
- Select PARK.
- Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
- Connect the scan tool.
- Key in ON position.
- Enter the following diagnostic mode on the scan tool: TCM Module.
- Enter the following diagnostic mode on the scan tool: Active Command Modes.
- Select TCM Module, then select Active Command Diagnostic Mode.
- Monitor the appropriate PID for the solenoid SSPC-x or TCC being tested, refer to the PID CHART in Output State Control (OSC) Mode.
- Can the PIDs be monitored or solenoids be commanded?
Yes : REMAIN in Active Command Diagnostic Mode. GO to A2.
No : REPEAT procedure to enter Active Command Diagnostic Mode. If the vehicle did not enter Active Command Diagnostic Mode, REFER to the INTRODUCTION - GASOLINE for diagnosis of the powertrain control module (PCM).
- A2 SOLENOID FUNCTIONAL TEST
- Monitor the appropriate commanded current and pressure PID(s) for the solenoid being tested.
- Select the appropriate solenoid that is to be tested, SSx_AMP or TCC_AMP.
- Select value: 0, 0.25, 0.50, 0.75 or 1.0 amp.
- Press "SEND".
- Select another value: 0 - 1.0 amp.
- Press "SEND".
- Cancel and return to normal operation.
- Do the monitored pressure and current readings change and match the command?
Yes : CLEAR DTCs. Road test. If symptom persists, GO to DIAGNOSIS BY SYMPTOM .
No : GO to A3.
- A3 CHECK FOR BATTERY VOLTAGE
- Disconnect the transmission vehicle harness connector from the transmission bulkhead connector.
- Inspect the harness connector for damaged pins.
- Key in ON position.
- Measure the voltage between the appropriate power pins on the harness side.
- Is the voltage greater than 10 volts?
Yes : GO to A4.
No : REPAIR the circuit. TEST for normal operation.
- A4 ELECTRICAL SIGNAL CHECK
- Disconnect the vehicle wire harness connector from the PCM.
- Carry out a continuity check between the appropriate transmission connector signal pin and the PCM connector signal pin on the vehicle harness side.
- Check the appropriate signal wire for shorts to ground.
- Are there shorts or opens in the vehicle wire harness signal lead?
Yes : REPAIR an open or short in the harness.
No : GO to A5.
- A5 CHECK THE INTERNAL HARNESS
- Drain the transmission fluid.
- Remove the transmission fluid pan.
- Disconnect: Affected Solenoid.
- Measure the resistance between pins 1, 3, 4, 5, 8, 10 and 12 transmission bulkhead side and pin 2 at each associated solenoid connector.
- Measure the resistance between pins 7, 20 and 24 transmission bulkhead side and pin 1 at each associated solenoid connector.
- Are the resistances less than 0.5 ohms?
Yes : GO to A6.
No : INSTALL a new harness. GO to A7.
- A6 CHECK FOR A SHORT TO GROUND
- Measure the resistance between pins 1, 3, 4, 5, 8, 10 and 12 harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new harness.
No : GO to A7.
- A7 CHECK THE SOLENOID RESISTANCE AT THE SOLENOID
- Measure the resistance between pins 1 and 2 at each solenoid.
- Is the resistance between 4.1-4.7 ohms ?
Yes : GO to A8.
No : INSTALL a new solenoid if not within specification. CLEAR the DTCs. TEST the system for normal operation.
- A8 CHECK THE SOLENOID FOR A SHORT TO GROUND
- Measure the resistance between pins 1 and 2 at each solenoid and ground.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new solenoid.
No : INSTALL a new PCM. If the condition persists, REFER to DIAGNOSIS BY SYMPTOM in this section for diagnosis of pressure concerns. CLEAR the DTCs. TEST the system for normal operation.