Dodge Ram Truck 1500-2500-3500. Manual - part 1654

P2706-MS SOLENOID CIRCUIT (CONTINUED)

For the Transmission circuit diagram (Refer to )(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/
545RFE - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Initially at power-up, then every 10 seconds thereafter. The solenoid circuits will also be tested immediately
after a gear ratio or pressure switch error is detected.

•

Set Condition:
After three consecutive solenoid continuity test failures, or one failure if test is run in response to a gear ratio
or pressure switch error. Note: This DTC is strictly an electrical fault and does not apply to any internal
transmission failures.

Possible Causes

RELATED RELAY DTC’S PRESENT

(T118) MS SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS

(T118) MS SOLENOID CONTROL CIRCUIT OPEN

(T118) MS SOLENOID CONTROL CIRCUIT SHORT TO GROUND

TRANSMISSION SOLENOID/TRS ASSEMBLY

POWERTRAIN CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - DIAGNOSIS AND TESTING).

Theory of Operation

The Transmission Control System uses six electronically controlled solenoids that allow hydraulic fluid to be applied
to various friction elements (clutches), which enables the gear requested. The continuity of each solenoid circuit is
periodically tested. Each inactive solenoid is turned on for a few milliseconds, then off. Each active solenoid is
turned off for a few milliseconds, then on. This pulsing of voltage to the solenoid causes an inductive spike which
can be sensed by the Transmission Control System. If an inductive spike is not sensed by the Transmission Control
System during the continuity check, it is tested again. If the test fails three consecutive times, the appropriate Diag-
nostic Trouble Code (DTC) is set. If the solenoid test is run in response to a gear ratio or pressure switch error, one
failure will result in setting the appropriate DTC. Note: This DTC is strictly an electrical fault and does not apply
to any internal transmission failures.

Diagnostic Test

RELATED TRANSMISSION RELAY DTC’S PRESENT

With the scan tool, check for other transmission DTC’s.

Are there any Transmission Control Relay DTC’s present?

Yes

>> Refer to the Transmission category and perform the appropriate symptom.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.

>> Go To 2

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AUTOMATIC TRANSMISSION - 545RFE - ELECTRICAL DIAGNOSTICS

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P2706-MS SOLENOID CIRCUIT (CONTINUED)

TRANSMISSION SOLENOID/TRS ASSEMBLY

Turn the ignition off to the lock position.

Remove the Starter Relay.

NOTE: Removal of the Starter Relay is to prevent a Transmission, NO RESPONSE, condition and disable the
starter.
Install Transmission Simulator, Miller tool #8333.

NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.

With the scan tool, actuate the MS Solenoid.

Monitor the MS Solenoid LED on the Transmission Simulator.

Did the MS Solenoid LED on the Transmission Simulator blink on and off?

Yes

>> Replace the Transmission Solenoid/TRS Assembly per the Service Information.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.

>> Go To 3

TRANSMISSION SOLENOID/TRS ASSEMBLY

With the scan tool, continue to actuate the MS Solenoid for the period of 2 minutes with the Transmission Simulator
still connected.

After 2 minutes of actuation, with the scan tool, stop the actuation and check for transmission DTCs.

Did the DTC P2706 reset during the actuation test?

Yes

>> Go To 4

>> Replace the Transmission Solenoid/TRS Assembly per the Service Information.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1.

(T118) MS SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS

Turn the ignition off to the lock position.

Disconnect the Transmission Simulator, Miller tool #8333.

Disconnect the PCM harness connectors.

Measure the resistance between the (T118) MS Solenoid Control cir-
cuit and all other circuits in the Transmission Solenoid/TRS Assembly
harness connector.

Is the resistance below 5.0 ohms between the (T118) MS Sole-
noid Control circuit and any other circuit(s) in the Transmission
Solenoid/TRS Assembly harness connector?

Yes

>> Repair the (T118) MS Solenoid Control circuit for a short

to other circuit(s).

Perform 45RFE/545RFE TRANSMISSION VERIFICATION
TEST - VER 1.

>> Go To 5

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P2706-MS SOLENOID CIRCUIT (CONTINUED)

(T118) MS SOLENOID CONTROL CIRCUIT OPEN

Connect Miller tool #8815 to the PCM C4 harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller special
tool #8815 to perform diagnosis.
Measure the resistance of the (T118) MS Solenoid Control circuit from
the Transmission Solenoid/TRS Assembly harness connector to the
appropriate terminal of Miller tool #8815.

Is the resistance above 5.0 ohms?

Yes

>> Repair the (T118) MS Solenoid Control circuit for an open.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION
TEST - VER 1.

>> Go To 6

(T118) MS SOLENOID CONTROL CIRCUIT SHORT TO GROUND

Measure the resistance between ground and the (T118) MS Solenoid
Control circuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the (T118) MS Solenoid Control circuit for a short

to ground.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION
TEST - VER 1.

>> Using the schematics as a guide, check the Powertrain

Control Module (PCM) terminals for corrosion, damage, or
terminal push out. Pay particular attention to all power and
ground circuits. If no problems are found, replace the PCM
per the Service Information. With the scan tool, perform
QUICK LEARN.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION
TEST - VER 1.

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45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1

For the Transmission circuit diagram (Refer to )(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/
545RFE - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1

1. After completion of the Transmission Verification Test, the Powertrain Verification Test must be per-
formed.

2. Connect the scan tool to the Data Link Connector (DLC).

3. Reconnect any disconnected components.

4. If the PCM has been replaced or reflashed, or the transmission has been repaired or replaced, it is nec-
essary to perform the scan tool Quick Learn Procedure.

5. With the scan tool, erase all Transmission and Engine DTC’s.

6. With the scan tool, display Transmission Temperature. Start and run the engine until the Transmission Temper-
ature is HOT.

7. Check the Transmission fluid level and adjust if necessary. Refer to the Service Information for the Fluid Fill
procedure. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE/FLUID - STANDARD PRO-
CEDURE)

8. Road test the vehicle.

9. Perform the following shifts from a standing start with a constant throttle opening of 20 to 25 degrees to the
speeds of 97 Km/h or 60 MPH; make fifteen to twenty 1 to 2, 2 to 3, 3 to 4 upshifts and for 545RFE, 4 to 5.

10. Perform the following shifts with speeds below 40 Km/h or 25 MPH; make five to eight wide open throttle kick-
downs to 1st gear. Allow at least 5 seconds each in 2nd and 3rd gear between each kickdown.

11. Check for DTC’s during the road test.

12. Use the EATX OBDII task manager to run Good Trip time in each gear, this will confirm the repair and to
ensure that the DTC has not re-matured.

13. With the scan tool, perform a BATTERY DISCONNECT, this will clear the EATX DTC EVENT DATA

Were there any Diagnostic Trouble Codes (DTCs) set during the road test?

Yes

>> Refer to the Symptom List for the appropriate diagnostic tests.

>> Repair is complete.

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