Page 2881 of 5267

When Monitored:
After a reset (ignition key turned to the RUN position).
Set Condition:
The checksum of the battery backed RAM does not match the stored checksum. Set Time: Less than 7 msec.
Possible Causes
BATTERY WAS DISCONNECTED
PCM WAS REPLACED OR DISCONNECTED
QUICK LEARN WAS PERFORMED
(A919) FUSED B+ CIRCUIT TO PCM OPEN
(Z908 and Z977) GROUND CIRCUIT OPEN
Always perform the 42RLE Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
Note: This is not a fault code. It exists to provide reference information only. A battery backed RAM is used to
maintain some learned values. When the battery is disconnected, this memory is lost. When the battery is recon-
nected, the loss of learned values will be detected by the controller. The code will be set and the learned values will
be initialized to known constants and the learning process will continue.Setting the code has no effect except for
re-initialization of learned values.
Diagnostic Test
1.BATTERY WAS DISCONNECTED
Has the battery been disconnected, lost it’s charge, or been replaced recently?
Ye s>>
Disconnecting or replacing the battery will set this DTC. Erase the DTC.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Go To 2
2.WAS QUICK LEARN PERFORMED
Has a Quick Learn procedure been performed?
Ye s>>
Performing Quick Learn will set this DTC. Erase the DTC.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Go To 3
3.PCM REPLACED OR DISCONNECTED
Has the PCM been replaced or disconnected?
Ye s>>
Replacing or disconnecting the PCM will set this DTC. Erase the DTC.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Go To 4
Page 2882 of 5267

4.(A919) FUSED B(+) CIRCUIT
Turn the ignition off to the lock position.
Disconnect the PCM C1 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 Special Tool #8815
to perform diagnosis.
Using a 12-volt test light connected to ground, check the (A919) Fused
B(+) circuit.
NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Ye s>>
Go To 5
No>>
Repair the Fused B+ circuit for an open. If the fuse is open
make sure to check for a short to ground.
Perform 42RLE TRANSMISSION VERIFICATION TEST -
VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 42RLE - STANDARD PROCEDURE)
5.(Z908) AND (Z977) GROUND CIRCUITS
Turn the ignition off to the lock position.
Disconnect the PCM C4 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Using a 12-volt test light connected to 12-volts, check the (Z908) and
(Z977) Ground circuits in the appropriate terminal of Miller tool #8815.
NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.
Does the test light illuminate brightly for all of the ground cir-
cuits?
Ye s>>
Go To 6
No>>
Repair the Ground circuits for an open.
Perform 42RLE TRANSMISSION VERIFICATION TEST -
VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 42RLE - STANDARD PROCEDURE)
6.INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set the DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specifictothiscircuit.
Wiggle the wires while checking for shorted and open circuits.
With the scan tool, check the DTC EVENT DATA to help identify the conditionsin which the DTC was set.
Were there any problems found?
Ye s>>
Repair as necessary.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Te s t C o m p l e t e .
Page 2883 of 5267

P1713-RESTRICTED MANUAL VALVE IN T2 RANGE
For a complete wiring diagramRefer to Section 8W
When Monitored:
Ignition on, engine running with the gear shift selector in a valid forwardgear.
Set Condition:
This DTC sets whenever Transmission control system detects the manual valve is in the T2 range when it
should be in OD. This is mainly an informational DTC.
Possible Causes
RELATED TRANSMISSION DTC’S PRESENT
CUSTOMER DRIVING HABITS
MIS-ADJUSTED SHIFTER CABLE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Diagnostic Test
1.DETERMINING IF RELATED DTC’S ARE PRESENT
With the scan tool, check for other transmission DTC’s
Are there any speed sensor or gear ratio DTCs present?
Ye s>>
Refer to the Transmission category and perform the appropriate symptom.
No>>
Go To 2
2.CHECK THE GEAR SHIFT CABLE FOR PROPER ADJUSTMENT
Check the Gear shift cable adjustment per the Service Information.
Also check the cable for possible binding or improperly routed.
Is the Gear shift cable properly adjusted and not binding or improperly routed?
Ye s>>
Go To 3
No>>
Adjust the Shifter Assembly per the Service Information.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
3.CHECK CUSTOMER DRIVING HABIT
This DTC can be set if the customer does not move the shift lever completely into the OD position (in between
gears) causing the manual valve to be in the T2 position.
When this occurs, the feed port to the clutch is restricted, the transmission will declare neutral, and this DTC will
set.
This DTC can also be set by simply bumping the shift lever toward neutral while accelerating.
With the scan tool, check the DTC EVENT DATA to help identify the conditionsin which the DTC was set.
If there are no possible causes remaining, view repair.
Repair
This DTC can be set by the shift lever inthe wrong position or not completelyin the OD position. Make
sure the customer is properly informed.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Page 2884 of 5267

P1745-TRANSMISSION LINE PRESSURE TOO HIGH FOR TOO LONG
For a complete wiring diagramRefer to Section 8W
When Monitored:
Continuously with ignition on.
Set Condition:
If the transmission has been operating in an open-loop line pressure control for 2000 miles or 1000 2-3
upshifts.
Possible Causes
LINE PRESSURE DTCS PRESENT
Always perform the 42RLE Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
This DTC is an informational DTC to inform the technician that transmission has been operating in an open-loop line
pressure control for 2000 miles or 1000 2-3 upshifts resulting from a Line Pressure DTC. The 42RLE Transmission
is not designed to operate in open-loop line pressure control for an extended period time. This DTC is intended to
protect the transmission. If the DTC sets, the transmission controller will place the transmission into limp-in mode.
Diagnostic Test
1.CHECKFORRELATEDDTC’S
With the scan tool, check for Transmission Line Pressure DTCs.
View repair
Repair
Refer to the Transmission category and perform the appropriate symptom. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - DIAGNOSIS AND TESTING)
Page 2885 of 5267
P1775-SOLENOID SWITCH VALVE LATCHED IN TCC POSITION
For a complete wiring diagramRefer to Section 8W.
Page 2886 of 5267

When Monitored:
Prior to a shift into 1st gear.
Set Condition:
Transmission temperature must be hot. DTC is set after six unsuccessful attempts to shift into 1st gear.
Possible Causes
RELATED DTC P0841 PRESENT
(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION
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 Solenoid Switch Valve, an internal, hydraulically operated valve, controls the direction of the transmission fluid
when the LR solenoid is energized. When the solenoid switch valve is in the downshifted position and the LR sole-
noid is energized, fluid is directed to the LR element for 1st gear. When thesolenoid switch valve is In the up-
shifted position (2nd, 3rd, and 4th gear) and the LR solenoid is energized,fluidisdirectedintotheLockupSwitch
Valve which controls the Torque Converter Clutch. When shifting into 1st gear, a special sequence is followed to
insure solenoid switch valve movement into the downshifted position. TheLR pressure switch is monitored to con-
firm switch valve movement. If the solenoid switch valve movement is not confirmed (i.e. no LR pressure when the
LR solenoid is energized), 2nd gear is substituted for 1st. No 1st gear (2ndgear is substituted). The transmission
Torque converter FEMCC operation is inhibited. MIL on after 5 min. of substituted operation.
Diagnostic Test
1.DETERMINING IF RELATED DTCS ARE PRESENT
With the scan tool, check for other Transmission DTCs
Is the DTC P0841 present also?
Ye s>>
Refer to the Transmission category and perform the appropriate symptom.
No>>
Go To 2
2.CHECK TO SEE IF DTC P1775 IS CURRENT
With the scan tool, view DTCs.
Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?
Ye s>>
Go To 3
No>>
Go To 8
Page 2887 of 5267

3.PCM AND WIRING
Turn the ignition off to the lock position.
Remove the Ignition Switch Feed fuse from the TIPM.
CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being
startedingear.
WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in
personal injury or death.
Install the Transmission Simulator,Miller tool #8333 and the ElectronicTransmission Adapter kit.
Ignition on, engine not running.
With the Transmission Simulator, turn the Pressure Switch selector switchtoL/R.
With the scan tool, monitor the L/R Pressure Switch State while pressing the Pressure Switch Test button.
Did the Pressure Switch state change from open to closed when the test button was pressed?
Ye s>>
Repair internal transmission as necessary per the Service Information. Inspect the Solenoid Switch
Valve per the Service Information and repair or replace as necessary. If noproblems are found, replace
the Transmission Solenoid/Pressure Switch Assembly.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Go To 4
4.(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid/Pressure Switch Assembly har-
ness connector.
Disconnect the PCM C4 harness connector.
With the scan tool under TIPM, actuate the Transmission.
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.
Using a 12-volt test light connected to ground, check all (T16) Trans-
mission Control Relay Output circuits in the appropriate terminals of
Miller tool #8815.
NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.
Does the test light illuminate brightly on all (T16) Transmission
Control Output circuits?
Ye s>>
Go To 5
No>>
Repair the (T16) Transmission Control Relay Output circuit
for an open.
Perform 42RLE TRANSMISSION VERIFICATION TEST -
VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 42RLE - STANDARD PROCEDURE)
Page 2888 of 5267

5.(T50) L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
With the scan tool under TIPM, stop the Transmission actuation.
Turn the ignition off to the lock position.
Measure the resistance of the (T50) L/R Pressure Switch Sense circuit
between the Transmission Solenoid/Pressure Switch Assembly harness
connector and the appropriate terminal of Miller tool #8815.
Is the resistance above 5.0 ohms?
Ye s>>
Repair the (T50) L/R PressureSwitch 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
6.(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (T50) L/R Pressure
Switch Sense circuit.
Is the resistance below 5.0 ohms?
Ye s>>
Repair the (T50) L/R PressureSwitch 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