Dodge Ram Truck 1500-2500-3500. Manual — part 1713

P1763-GOVERNOR PRESSURE SENSOR VOLTS TOO HI (GAS) (CONTINUED)

6.

CHECK THE (T38) GOVERNOR PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER
CIRCUIT

Turn the ignition off to the lock position.

Measure the resistance between the (T38) Governor Pressure Sensor
Signal circuit and all other circuits in the Transmission Solenoid
Assembly harness connector.

Is the resistance below 100k ohms between the (T38) Governor
Pressure Sensor Signal circuit and any other circuit(s) in the
Transmission Solenoid Assembly harness connector?

Yes

>> Repair the (T38) Governor Pressure Sensor Signal circuit

for a short to another circuit(s).

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

No

>> Go To 7

7.

CHECK THE (T38) GOVERNOR PRESSURE SENSOR SIGNAL CIRCUIT OR AN OPEN INTERNAL

Remove the Transmission Oil Pan. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE/FLUID - STANDARD PROCE-
DURE)

Reconnect the Transmission Solenoid Assembly harness connector.

Disconnect the Governor Pressure Sensor harness connector.

Measure the resistance of the (T38) Governor Pressure Sensor Signal
circuit between the PCM C2 harness connector and the Governor
Pressure Sensor harness connector internal to the transmission.

Is the resistance below 5.0 ohms?

Yes

>> Go To 8

No

>> Replace the Transmission Solenoid Assembly per the Ser-

vice Information. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

DR/DH

P1763-GOVERNOR PRESSURE SENSOR VOLTS TOO HI (GAS) (CONTINUED)

8.

CHECK THE (K900) SENSOR GROUND CIRCUIT FOR AN OPEN INTERNAL

Measure the resistance of the (K900) Sensor Ground circuit between
the PCM C2 harness connector and the Governor Pressure Sensor
harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 9

No

>> Replace the Transmission Solenoid Assembly per the Ser-

vice Information. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

9.

CHECK THE (T38) GOVERNOR PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
INTERNAL

NOTE: The Transmission Solenoid Assembly harness connector
must be connected before proceeding.
Ignition on, engine not running.

Measure the voltage of the (T38) Governor Pressure Sensor Signal
circuit in the Governor Pressure Sensor harness connector (inside
transmission).

Is the voltage above 0.5 volt?

Yes

>> Replace the Transmission Solenoid Assembly per the Ser-

vice Information. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

No

>> Go To 10

DR/DH

AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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P1763-GOVERNOR PRESSURE SENSOR VOLTS TOO HI (GAS) (CONTINUED)

10.

ENGINE CONTROL MODULE

Turn the ignition off to the lock position.

Reconnect the PCM harness connector.

Reconnect the Transmission Solenoid Assembly harness connector.

Ignition on, engine not running.

With the scan tool, erase DTCs.

Connect a jumper wire between the (T38) Governor Pressure Sensor
Signal circuit and the (K900) Sensor Ground circuit in the Transmis-
sion Governor Pressure Sensor harness connector.

With the scan tool, read DTCs.

Did the DTC P0869 set?

Yes

>> Replace the Governor Pressure Sensor per the Service

Information. (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE/GOVERNOR PRESSURE SENSOR -
REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCE-
DURE)

No

>> Using the schematics as a guide, check the Powertrain Control Module (PCM) pins, terminals, and con-

nectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground
circuits. If no problems are found, replace and program the PCM per the Service Information. (Refer to
8

-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/POWERTRAIN

CONTROL

MODULE

-

REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)

11.

INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set. Pay particular attention
to the DTC set conditions, such as, VSS, MAP, ECT, and Load

Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched,
or partially broken wires.

Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Wiggle the wiring and connectors while checking for any possible open or shorted circuits.

Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

Were there any problems found?

Yes

>> Repair as necessary.

Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (GAS). (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)

No

>> Test Complete.

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

DR/DH

P1764-GOVERNOR PRESSURE SENSOR VOLTS TOO LOW (GAS)

DR/DH

AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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