Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1987

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When Monitored:
Continuously with the ignition in the run position.

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Set Condition:
The DTC will set if an invalid PRNDL code which lasts for more than 100 milliseconds and within 1 second of
power-up or the PRNDL code error does not correct itself before a change in input occurs.

Possible Causes

SHIFTER OUT OF ADJUSTMENT

TRS (T1) SENSE CIRCUIT OPEN

TRS (T3) SENSE CIRCUIT OPEN

TRS (T41) SENSE CIRCUIT OPEN

TRS (T42) SENSE CIRCUIT OPEN

TRS (T1) SENSE CIRCUIT SHORT TO GROUND

TRS (T3) SENSE CIRCUIT SHORT TO GROUND

TRS (T41) SENSE CIRCUIT SHORT TO GROUND

TRS (T42) SENSE CIRCUIT SHORT TO GROUND

TRS (T1) SENSE CIRCUIT SHORT TO VOLTAGE

TRS (T3) SENSE CIRCUIT SHORT TO VOLTAGE

TRS (T41) SENSE CIRCUIT SHORT TO VOLTAGE

TRS (T42) SENSE CIRCUIT SHORT TO VOLTAGE

TRANSMISSION RANGE 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 C1 through C4 (T1, T3, T41, and T42) sense circuits communicate the shift lever position to the PCM. Each
circuit is terminated at the transmission with a switch. Each switch can be either open or closed, depending on the
shift lever position. The PCM can decode this information and determine the shift lever position. Each shift lever
position has a certain combination of switches, which will be open and closed, this is called a PRNDL code. There
are 4 switches, therefore: there are many possible combinations of open and closed switches (codes). However,
there are only 9 valid codes (8 for AutoStick), one for each gear position and three recognized between gear codes.
The remainder of the codes should never occur, these are called invalid codes. The following chart shows the nor-
mal switch states for each shift lever position.

TRS SWITCH STATES

SLP

T42

T41

T3

T1

P

CL

CL

CL

OP

R

CL

OP

OP

OP

N

CL

CL

OP

CL

OD

OP

OP

OP

CL

3

OP

OP

CL

OP

L

CL

OP

CL

CL

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Diagnostic Test

1.

CHECK IF THE DTC P0706 IS CURRENT

With the scan tool, erase Transmission DTCs.

Cycle the ignition off, then start the vehicle.

Firmly apply the brakes and shift into Overdrive.

NOTE: Vehicle must remain in Overdrive for at least three seconds.
With the brakes firmly applied, shift slowly through all gears (PRNDL) as least three times, pausing momentarily in
each gear.

NOTE: If all the PRNDL lights box individually then the error was cleared.
Shift into park and turn the ignition off to the lock position.

Ignition on, engine not running.

With the scan tool, read Transmission DTCs.

Does the DTC P0706 reset, or do all the PRNDL indicators remain boxed in park or neutral?

Yes

>> Go To 2

No

>> Go To 18

2.

CHECK SHIFTER OPERATION

With the scan tool, perform the Shift Lever Position Test.

Select the test outcome from the following:

Test passes

Go To 18

Test fails with error code

Go To 3

Test fails without error code

Go To 17

3.

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.

Ignition on, engine not running.

With the scan tool, perform the Shift Lever Position Test.

When the scan tool instructs you to put the Gear Selector in a particular position, you must do so using the Trans-
mission Simulator.

The LED for the gear position in question must be illuminated on the Transmission Simulator, prior to pressing the
ENTER key on the scan tool.

NOTE: After completion of this procedure, make sure to disconnect the Transmission Simulator, Miller tool
#8333 and Electronic Transmission adaptor cable kit, Miller tool #8333-1A and reconnect all connectors.

Did the Shift Lever Position Test pass?

Yes

>> Replace the Transmission Range Sensor per the Service Information.

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

No

>> Go To 4

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4.

IDENTIFY FAULTY CIRCUIT

Reconnect all disconnected connectors. Turn the ignition on, engine not running.

With the scan tool, monitor the TRS Sense circuits on the Input/Output screen - C1 through C4.

Move the shift lever through all gear positions, pausing momentarily in each gear position and watch for one of the
circuits to not change state.

Pick the one that did not change state.

TRS (T1)sense (C4)

Go To 5

TRS (T3)sense (C3)

Go To 8

TRS (T41)sense (C1)

Go To 11

TRS (T42)sense (C2)

Go To 14

5.

TRS (T1) SENSE CIRCUIT OPEN

Turn the ignition off to the lock position.

Disconnect the TRS harness connector.

Disconnect the PCM C4 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 TRS (T1) Sense circuit from the appro-
priate terminal of special tool #8815 to the TRS harness connector.

Is the resistance above 5.0 ohms?

Yes

>> Repair the TRS (T1) Sense circuit for an open.

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

No

>> Go To 6

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6.

TRS (T1) SENSE CIRCUIT SHORT TO GROUND

Turn the ignition off to the lock position.

Disconnect the TRS harness connector.

Disconnect the PCM C4 harness connector.

NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the TRS (T1) Sense cir-
cuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the TRS (T1) Sense circuit for a short to ground.

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

No

>> Go To 7

7.

TRS (T1) SENSE CIRCUIT SHORT TO VOLTAGE

Turn the ignition off to the lock position.

Disconnect the TRS harness connector.

Disconnect the PCM C4 harness connector.

Remove the Transmission Control Relay from the PDC.

NOTE: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the (Internal) Fused B+ circuit and the
(T16) Transmission Control Relay Output circuit in the Transmission
Control Relay connector.

Ignition on, engine not running.

Measure the voltage of the TRS (T1) Sense circuit at the appropriate
terminal of special tool #8815.

Is the voltage above 0.5 volt?

Yes

>> Repair the TRS (T1) Sense circuit for a short to voltage.

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

No

>> 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, then program Pinion Factor in the Front
Control Module. (Refer to 8 - ELECTRICAL/ELECTRONIC

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