Page 3538 of 5267
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS
For a complete wiring diagramRefer to Section 8W
Page 3545 of 5267
P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS (GAS)
For a complete wiring diagramRefer to Section 8W
Page 3552 of 5267
P0751-O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES
For a complete wiring diagramRefer to Section 8W
Page 3555 of 5267
P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS)
For a complete wiring diagramRefer to Section 8W
Page 3562 of 5267
P0783-3-4 SHIFT SOL, NO RPM DROP AT LOCKUP (GAS)
For a complete wiring diagramRefer to Section 8W
Page 3566 of 5267
P0850-P/N SWITCH PERFORMANCE (GAS)
For a complete wiring diagramRefer to Section 8W
Page 3571 of 5267
P128B-TCM POWER CONTROL CIRCUIT 2 LOW - TIPM
For a complete wiring diagramRefer to Section 8W.
Page 3573 of 5267

3.CHECK THE (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT FOR AN OPEN
Turn the ignition off to the lock position.
Connect the TIPM C10 harness connector.
Disconnect the Transmission Solenoid harness connector.
Ignition on, engine not running.
Using the scan tool under the TIPM Actuators, actuate the Transmission
control output.
Using a 12-volt test light connected to ground, check the (T16) Trans-
mission Control Output circuit at the Transmission Solenoid harness
connector.
NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Ye s>>
Go To 4
No>>
Repair the (T16) Transmission Control Output circuit for an
open.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
4.TOTALLY INTEGRATED POWER MODULE
NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors.
Pay particular attention to allPower and voltage circuits.
Were any problems found?
Ye s>>
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No>>
Replace the Totally Integrated Power Module per Service Information.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
5.INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Ye s>>
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No>>
Te s t c o m p l e t e .