Content .. 2015 2016 2017 2018 ..

Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 2017

P0884-POWER UP AT SPEED

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
One time after each controller reset. Note: the Transmission Control Module is integrated with Powertrain Con-
trol Module. The Transmission Control Module has separate powers and grounds specifically to its portion of
the PCM.

•

Set Condition:
This DTC will set if the PCM powers up and senses the vehicle in a valid forward gear (no PRNDL DTCs) with
a output speed above 800 RPM, approximately 32 Km/h (20 mph).

Possible Causes

INTERMITTENT POWER AND GROUND CIRCUITS

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

Theory of Operation

If a vehicle loses power to the PCM, the vehicle will go to the 2nd gear mode since there is no power available to
control the transmission solenoids. However if power is restored, the PCM will power-up and normal operation will
be restored. This DTC identifies that power to the PCM was restored when the gear selector was in a

Drive

posi-

tion while the vehicle was moving at speeds above 32 Km/h (20 mph). If a customer shifts to Neutral and cycles the
ignition key and quickly shifts to

Drive

while moving before the PCM comes out of its START ROUTINE, the DTC

can be set. Therefore it is critical that this DTC diagnosis repair procedure should only be used if the vehicle is
experiencing intermittent 2nd gear operation and subsequently a return to normal operation during normal driving.
The transmission will not be placed in Limp-in. This is an informational DTC to be used when attempting to diag-
nose an intermittent 2nd gear operation and subsequent return to normal transmission operation.

Diagnostic Test

CHECK THE POWER AND GROUND CIRCUITS

This DTC is set when the PCM is initialized while the vehicle is moving in a valid forward gear. This is usually
caused by a momentary loss of power to the Transmission portion of the PCM.

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.

NOTE: Due to the integration of the Powertrain and Transmission Control Modules, the transmission part of
the PCM has its own specific power and ground circuits.
Check all of the Fused B+, Fused Ignition Switch Output, and Ground circuits related to the PCM for an intermittent
open or short to ground.

Perform a wiggle test on all wiring and connectors pertaining to the PCM while looking for shorted or open circuits.

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

View repair.

Repair

Repair as necessary.

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

21 - 602

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

P0890-SWITCHED BATTERY

For a complete wiring diagram Refer to Section 8W.

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

21 - 603

•

When Monitored:
One time after a reset (ignition key turned to the RUN position or after cranking engine).

•

Set Condition:
Fault Set If: A voltage is greater than 4.5 volts is detected on any of the pressure switches, before the relay is
energized. Fault Set Time: Less than 7 msec, transmission placed in Limp-In. MIL on after 10 sec. of vehicle
operation).

Possible Causes

(T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

(T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

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 transmission relay is used to supply power to the solenoid pack when in normal operating mode, and to turn off
power to produce transmission

limp-in

mode. The relay output (which supplies power to the solenoid pack) is fed

back to the controller. It is referred to as SWITCHED BATTERY. After a controller reset (ignition key turned to the
RUN position or after cranking engine), the controller verifies that the relay contacts are open by checking for no
voltage on Switched battery line (ie. transmission control relay output) before the relay is energized. After switched
battery is verified for no voltage, the voltage of each of the solenoid pack pressure switches is also checked. Since
the solenoid pack is not powered up, there should be no voltage on any of the pressure switches.

Diagnostic Test

CHECK TO SEE IF DTC P0890 IS PRESENT

With the scan tool, Check the STARTS SINCE SET counter for P0890.

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

Is the

(

STARTS SINCE SET

(

counter set at 0?

Yes

>> Go To 2

>> Go To 5

21 - 604

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

(T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the Solenoid/Pressure Switch Assembly harness connector.

Remove the Transmission Control Relay.

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

Ignition on, engine not running.

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 voltage of the (T9) OD Pressure Switch Sense circuit.

Is the voltage above 0.5 volt?

Yes

>> Repair the (T9) OD Pressure Switch Sense circuit for a

short to voltage.

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

>> Go To 3

(T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the Transmission Solenoid/Pressure Switch Assembly har-
ness connector.

Remove the Transmission Control Relay.

Ignition on, engine not running.

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 voltage of the (T47) 2/4 Pressure Switch Sense circuit.

Is the voltage above 0.5 volt?

Yes

>> Repair the (T47) 2/4 Pressure Switch Sense circuit for a

short to voltage.

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

>> Go To 4

AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS

21 - 605

Content .. 2015 2016 2017 2018 ..