DTC 69

Diagnostic Chart:

Circuit Schematic:

LINE PRESSURE ACTUATOR CIRCUIT SHORTED TO VOLTAGE
During normal driving modes the PCM/TC adapts line pressure to prevent clutch slip and harsh shifts. This is accomplished by modulating the line pressure actuator ground (1530) to raise or lower pressure. Open circuit = high pressure, grounded circuit = low pressure. When the PCM opens the circuit the voltage is monitored at terminal J3F1 to check for proper circuit conditions.

INFORMATION FLAG PARAMETERS
Information flag 69 is set when the PCM has detected the following condition twice per ignition cycle.
^ Voltage monitored at terminal J3F1 (circuit 1530) is greater than 2 - 2.5 volts when the line pressure actuator is switched on electrically by the PCM.

TEST DESCRIPTION
Numbered steps below refer to numbered steps on chart.
1. This step verifies problem is still present.
2. If the actuator, connector plate, or circuit 1530 is shorted, information flag 69 will set. This step will break down the circuit down to find the source of the short.
3. If circuit 1530 is shorted to voltage, information flag 69 will set. This step checks circuit 1530 for a short to voltage.
4. This step will determine if it is the actuator or the actuator connector plate that is shorted. An actuator is shorted internally when its resistance is one or more ohms lower than the average resistance of the other actuators at the same temperature.

DIAGNOSTIC AIDS
When attempting to diagnose an intermittent problem use the Scan tool[1] to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

Check the tightness of the female terminal grip with a spare male terminal.

When the PCM detects a fault in the circuit (open, ground, short) the PCM will open the circuit internally to protect the circuit.

[1] Select Malfunction History from Scan tool TCM menu.