DTC 75

DTC 75 Chart:

Transmission Voltage Circuit:

CIRCUIT DESCRIPTION
CKT 539 is the ignition feed for the Powertrain Control Module (PCM)

DTC 75 WILL SET WHEN:
The ignition is "ON" and PCM terminals "B30" and "D3" voltage is less than the graduated scale of:
-40°C (-40°F) = 7.3 volts,
90°C (194°F) = 10.3 volts,
150°C (304°F) = 11.7 volts,
with engine speed greater than 1000 RPM for 4 seconds.

ACTION TAKEN (PCM will default to):
During the time the failure is present, the pressure control solenoid is turned "OFF" (maximum line pressure), there is a soft landing to third gear, and Torque Converter Clutch (TCC) operation is inhibited. (The setting of additional diagnostic trouble codes may result.) DTC 75 will be stored in the PCM memory but will not turn "ON" the Malfunction Indicator Lamp (MIL).

DTC 75 WILL CLEAR WHEN:
The fault condition(s) no longer exist.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test checks for normal battery voltage between 9 - 15 volts.
2. This test checks if the low voltage display is due to the generator, B+ voltage supply CKT(s), or PCM. If the voltage is less than 9 volts, the PCM is OK.

DIAGNOSTIC AIDS
If diagnostic trouble code sets when an accessory is operated, check for poor connections or excessive current draw. Also, check for poor connections at starter solenoid or fusible link.