Dodge Ram Truck 1500-2500-3500. Manual — part 1693

P0712-TRANS TEMP SENSOR VOLTAGE TOO LOW (GAS) (CONTINUED)

6.

TRANSMISSION TEMPERATURE SENSOR

TYPICAL VALUES FOR TRANSMISSION TEMPERATURE SENSOR

TEMPERATURE

MIN TO MAX OHM RANGE

-40° C (-40° F)

1094 to 1176 ohms

0.0° C (32° F)

1587 to 1672 ohms

25° C (77° F)

1960 to 2040 ohms

70° C (158° F)

2709 to 2860 ohms

0° C (212° F)

3284 to 3500 ohms

120° C (120° F)

3684 to 3950 ohms

150° C (302° F)

4110 to 4450 ohms

Measure the resistance of the Transmission Temperature Sensor between the (T54) Transmission Temperature Sen-
sor Signal circuit and (K900) Sensor Ground circuit.

Using the chart above, compare the Temperature Sensor temperature to the correlating resistance value.

Is the resistance below the minimum specification for the sensor temperature?

Yes

>> Replace the Governor Pressure/Transmission Temperature 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 PROCEDURE)

No

>> Go To 7

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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P0712-TRANS TEMP SENSOR VOLTAGE TOO LOW (GAS) (CONTINUED)

7.

POWERTRAIN CONTROL MODULE

Reconnect the all disconnected connectors.

Ignition on, engine not running.

With the scan tool, erase Engine DTCs.

With the scan tool, monitor Engine DTC’s.

Disconnect the Transmission Temperature Sensor connector.

Did the DTC P0713 set?

Yes

>> Go To 8

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)

8.

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

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P0713-TRANS TEMP SENSOR VOLTAGE TOO HIGH (GAS)

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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P0713-TRANS TEMP SENSOR VOLTAGE TOO HIGH (GAS) (CONTINUED)

For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - SCHE-
MATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W

Theory of Operation

The Transmission Temperature Sensor is used to sense when the transmission temperature is too hot or too cold to
operate overdrive and/or the torque convertor clutch. When the transmission sensor detects a temperature below 0°
C (32° F), overdrive and the torque convertor clutch are disabled. When the detected temperature is above 127° C
(260° F), overdrive is disabled and 3rd gear with TCC is engaged, this strategy is used to increase transmission
fluid flow to help cool the transmission.

•

When Monitored:
Continuously with the ignition on and the engine running.

•

Set Condition:
This DTC will set if the (T54) Transmission Temperature Sensor Signal circuit voltage exceeds 3.76 volts for
the period of 2.2 seconds.

Possible Causes

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO (F856) 5-VOLT SUPPLY
CIRCUIT

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN

(K900) SENSOR GROUND CIRCUIT OPEN

(T54) 5-VOLT SUPPLY OPEN IN TRANSMISSION

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO (F856) 5-VOLT SUPPLY
CIRCUIT INTERNAL TO THE TRANSMISSION

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN INTERNAL TO THE TRANSMISSION

(K900) SENSOR GROUND CIRCUIT OPEN INTERNAL TO THE TRANSMISSION

TRANSMISSION TEMPERATURE SENSOR

POWERTRAIN CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)

1.

CHECK IF THE DTC IS CURRENT

Ignition on, engine not running.

With the scan tool, read Engine DTCs.

Record the Freeze Frame data for the reported DTC.

With the scan tool, erase DTCs.

Turn the ignition off to the lock position.

Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.

NOTE: It may be necessary to road test the vehicle to duplicate the original set conditions.
With the scan tool, read Engine DTCs.

Did the DTC reset?

Yes

>> Go To 2

No

>> Go To 12

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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