Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1991

6.

INTERMITTENT WIRING AND CONNECTORS

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

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

With the scan tool, check the EATX DTC EVENT DATA to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes

>> Repair as necessary.

Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

No

>> Test Complete.

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P0713-TRANSMISSION TEMPERATURE SENSOR HIGH

For a complete wiring diagram Refer to Section 8W.

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•

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

•

Set Condition:
The DTC will set when the monitored Temperature Sensor voltage rises above 4.94 volts for the period of 1.45
seconds. When the fault is set, calculated temperature is substituted for measured temperature, however the
fault code is stored only after three consecutive occurrences of the fault.

Possible Causes

(K900) SENSOR GROUND OPEN

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE

TRANSMISSION TEMPERATURE SENSOR

POWERTRAIN CONTROL MODULE

Always perform the 42RLE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

Theory of Operation

The temperature sensor is used to sense the temperature of the transmission fluid. Transmission fluid temperature
can affect shift quality, torque converter operation and when or if some diagnostics are run. A failed temperature
sensor could affect the OBD diagnostics. If a problem occurs in the transmission temperature sensor circuit, trans-
mission temperature will be based on a calculated value.

1.

CHECK TO SEE IF DTC IS CURRENT

With the scan tool, Check the STARTS SINCE SET counter for P0713.

NOTE: This counter only applies to the last DTC set.

Is the STARTS SINCE SET counter 2 or less?

Yes

>> Go To 2

No

>> Go To 7

2.

PCM AND WIRING

Turn the ignition off to the lock position.

Remove the Starter Relay.

CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO RESPONSE, condition and disable
the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit 8333-1A.

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

With the Transmission Simulator, turn the Input/Output switch to OFF.

With the scan tool, monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three posi-
tions on the Transmission Simulator.

Compare the scan tool readings with the numbers listed on the Transmission Simulator.

Do the readings on the Transmission Simulator match the scan tool readings ± 0.2 volts?

Yes

>> Go To 3

No

>> Go To 4

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3.

TRANSMISSION TEMPERATURE SENSOR

If there are no possible causes remaining, view repair.

Repair

Replace TRS Assembly per the Service Information.

Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

4.

(T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the TRS harness connector

NOTE: Check connectors - Clean/repair as necessary.

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 Tool #8815 to per-
form diagnosis.
Measure the resistance of the Transmission Temperature Sensor Signal
circuit from the appropriate terminal of special tool #8815 to the TRS
harness connector.

Is the resistance above 5.0 ohms?

Yes

>> Repair the Transmission Temperature Sensor Signal circuit

for an open.

Perform 42RLE TRANSMISSION VERIFICATION TEST -
VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 42RLE - STANDARD PROCEDURE)

No

>> Go To 5

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