P0752-1-2/4-5 SOLENOID

For a complete wiring diagram Refer to Section 8W

Theory of Operation

The 1-2/4-5 Solenoid is activated when the Transmission Control Module (TCM) determines that the transmission must shift into or out of second or fifth gear. The solenoid is only activated during the actual shift of the transmission. When the solenoid is activated, hydraulic pressure is applied to the proper shift elements in the transmission to allow the desired shift. Once the shift is completed the solenoid is turned off.

When Monitored:
When both the 1-2/4-5 Solenoid and the Solenoid Supply voltage is active.
Set Condition:
When 1-2/4-5 Solenoid is turned on and the TCM detects any of the following in the 1-2/4-5 Solenoid or circuit: open, short to ground, short to voltage, or the solenoid driver in the TCM.

Possible Causes

(T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT OPEN

(T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT SHORT TO GROUND

(T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT SHORT TO ANOTHER CIRCUIT

1-2/4-5 SOLENOID

TRANSMISSSION CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Diagnostic Test

1.CHECK IF THE DTC IS CURRENT

NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set.

Did the DTC P0752 reset?

Yes

Go To 2

Go To 6

2.CHECK THE (T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR AN OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 3

Repair the (T76) 1-2/4-5 Solenoid Control circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

3.CHECK THE (T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND

Is the resistance below 5.0 ohms?

Yes

Repair the (T76) 1-2/4-5 Solenoid Control circuit for a short to ground.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Go To 4

4.CHECK THE (T76) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR A TO ANOTHER CIRCUIT

Is the resistance below 5.0 ohms between the (T76) 1-2/4-5 Solenoid Control circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector?

Yes

Repair the (T76) 1-2/4-5 Solenoid Control circuit for another circuit.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Go To 5

5.CHECK THE 1-2/4-5 SOLENOID

Is the resistance between 2.5 and 6.5 ohms?

Yes

Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - REMOVAL)
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Replace the 1-2/4-5 Solenoid per the Service Information.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

6.INTERMITTENT WIRING AND CONNECTORS

Were there any problems found?

Yes

Repair as necessary.
Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Test Complete.