2006 DODGE RAM SRT-10 Service Repair Manual

radiator oil type rear entertainment check engine coolant heating

Page 2777 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0734-GEAR RATIO ERROR IN 4TH
For a complete wiring diagramRefer to Section 8W.
When Monitored:
The Transmission gear ratio is monitored continuously while the transmission is in gear.
Set Condition:

Page 2778 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 3.CHECK FOR INTERMITTENT OPERATION
The conditions to set this DTC are not current at this time.
Check the gearshift linkage adjustment.
Gear ratio DTC’s can be set by problems in the Input and Outpu

3.CHECK FOR INTERMITTENT OPERATION
The conditions to set this DTC are not current at this time.
Check the gearshift linkage adjustment.
Gear ratio DTC’s can be set by problems in the Input and Output Speed Sensor circuits. If the vehicle passes the
Clutch Test and still sets a Gear Ratio DTC, check the Speed Sensors for proper operation.
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.
Check the wiring and connectors for the Speed Sensors for a good connection, then perform a wiggle test using the
Transmission Simulator.
This DTC can also be set under extreme temperature conditions, this is usually caused by an internal problem.
Verify if the problem is only experienced under extreme hot or cold conditions.
With the scan tool, check the DTC EVENT DATA to help identify the conditionsin which the DTC was set.
Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply.
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 .
4.CHECKFORRELATEDPRESSURESWITCHDTCS
With the scan tool, read Transmission DTC’s.
Are the DTC’s P0870 and/or P0871 present also?
Ye s>>
Replace the Transmission Solenoid/Pressure Switch Assembly per the Service Information.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
No>>
Repair internal Transmission per the Service Information. Check all of the components related to the
O/D and 2/4 clutches. Inspect the Oil Pump and repair or replace as necessary.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

Page 2779 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0736-GEAR RATIO ERROR IN REVERSE
For a complete wiring diagramRefer to Section 8W.
When Monitored:
The Transmission gear ratio is monitored continuously while the transmission is in gear.
Set Conditi

P0736-GEAR RATIO ERROR IN REVERSE
For a complete wiring diagramRefer to Section 8W.
When Monitored:
The Transmission gear ratio is monitored continuously while the transmission is in gear.
Set Condition:
If the ratio of the Input RPM to the Output RPM does not match the current gearratio when compared to the
known gear ratio.
Possible Causes
RELATED TRANSMISSION DTCS PRESENT
INTERMITTENT GEAR RATIO ERRORS
INTERNAL TRANSMISSION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
The transmission system uses two speed sensors, one to measure input RPM and one to measure output RPM.
These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through
data checks. When in gear, if the gear ratio does not compare to a known gear ratio, the corresponding gear ratio
error trouble code is set. The transmission will go into Limp-in mode afterfour gear ratio error events occur in a
given driving cycle.
Diagnostic Test
1.DETERMINING IF RELATED TRANSMISSION DTCS ARE PRESENT
With the scan tool, read Transmission DTCs.
If any of these DTCs are present, perform their respective tests first.
Are there any Loss of Prime, Line Pressure Sensor and/or Speed Sensor DTCs present?
Ye s>>
Refer to appropriate diagnostic procedure in the Transmission category.If any of these DTCs are
present, they will cause a gear ratio error. Perform the test for Loss of Primefirstifitispresent.
No>>
Go To 2
2.CHECK TO SEE IF P0731 IS CURRENT
With the scan tool, perform the Reverse gear clutch test. Follow the instructions on the scan tool.
Increase the throttle angle or TPS Degree to 30° for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the Clutch Test pass, Input Speed remain at zero?
Ye s>>
Go To 3
No>>
Repair internal Transmission per the Service Information. Check all of the components related to the
Reverse and LR clutches. Inspect the Oil Pump and repair or replace as necessary.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

Page 2780 of 5267

Page 2781 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0740-TCC OUT OF RANGE
For a complete wiring diagramRefer to Section 8W.
When Monitored:
The Torque Converter Clutch (TCC) is in FEMCC or PEMCC, Transmission temperature is hot, Engine tem-
perature i

P0740-TCC OUT OF RANGE
For a complete wiring diagramRefer to Section 8W.
When Monitored:
The Torque Converter Clutch (TCC) is in FEMCC or PEMCC, Transmission temperature is hot, Engine tem-
perature is greater than 38° C or 100° F, Transmission Input Speed greater than engine speed, TPS less than
30°, and brake not applied.
Set Condition:
The TCC is modulated by controlling the duty cycle of the L/R Solenoid untilthe difference between the Engine
RPM and the Transmission Input Speed RPM or duty cycle is within a desired range. The DTC is set after the
period of 10 seconds and 3 occurrences of either: FEMCC - with slip greater than 100 RPM or PEMCC - duty
cycle greater than 85%.
Possible Causes
RELATED L/R SOLENOID OR PRESSURE SWITCH DTCS PRESENT
INTERNAL TRANSMISSION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
When in 2nd, 3rd, or 4th gear, the torque converter clutch (TCC) can be locked or partially locked when certain
conditions are met. The TCC piston is electronically modulated by increasing the duty cycle of the LR/TCC solenoid
until the torque converter slip difference (difference between engine and turbine speed) is within 60 RPM. Then the
LR/TCC solenoid is fully energized (FEMCC / 100% duty cycle). Torque converter slip is monitored in FEMCC to
ensure adequate clutch capacity. The transmission will attempt normal EMCC operation (not in Limp-in) even after
the MIL is illuminated. MIL will illuminate after 5 minutes of accumulatedslip in FEMCC.
Diagnostic Test
1.CHECK IF RELATED DTCS ARE PRESENT
With the scan tool, read Transmission DTCs
Are the DTCs P0750 and/or P0841 present also?
Ye s>>
Refer to the Transmission category and perform the appropriate symptom.
No>>
Go To 2
2.CHECK IF THE DTC IS CURRENT
Ignition on, engine not running.
With the scan tool, record and erase DTCs.
Drive the vehicle until it is fully warmed up to at least 43° C (110° F).
Perform the following step 3 times.
Drive the vehicle at 50 mph and allow 4th gear to engage for at least 10 seconds. Close the throttle, then tip back
in until the throttle angle is between 25 and 29 degrees. Note that if you go over 30 degrees, you must back off of
the throttle and retry.
Did the TCC engage during any of the attempts?
Ye s>>
Go To 3
No>>
Perform the Hydraulic Pressure test per the Service Information and repair the internal transmission
components and Torque convertor as necessary.
Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)

Page 2782 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 3.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.
Wig

Page 2783 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0750-LR SOLENOID CIRCUIT
For a complete wiring diagramRefer to Section 8W.

Page 2784 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual When Monitored:
Initially at ignition on, then every 10 seconds thereafter. The solenoidswill also be tested immediately after a
gear ratio error or pressure switch error is detected.
Set Condition:
T

When Monitored:
Initially at ignition on, then every 10 seconds thereafter. The solenoidswill also be tested immediately after a
gear ratio error or pressure switch error is detected.
Set Condition:
Three consecutive solenoid continuity test failures, or one failure if test is run in response to a gear ratio or
pressure switch error.
Possible Causes
RELATED TIPM TCM POWER CONTROL CIRCUIT DTCS PRESENT
(T20) L/R SOLENOID CONTROL CIRCUIT OPEN
(T20) L/R SOLENOID CONTROL CIRCUIT SHORT TO GROUND
(T20) L/R SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
Theory of Operation
Four solenoids are used to control the friction elements (clutches). The continuity of the solenoids circuits are peri-
odically tested. Each solenoid is turned on or off depending on its currentstate. An inductive spike should be
detected by the PCM during this test. If no spike is detected, the circuit istested again to verify the failure. In
addition to the periodic testing, the solenoid circuits are tested if a gear ratio or pressure switch error occurs. In this
case, one failure will result in the appropriate DTC being set. The MIL willilluminate and the transmission goes into
neutral, if the DTC is set above 35 Kmh (22 mph), Limp-in mode when vehicle speed is below 35 Kmh (22 mph).
Diagnostic Test
1.DETERMINING IF RELATED TIPM TCM POWER CONTROL CIRCUIT DTCS PRESENT
With the scan tool, read TIPM DTCs.
Are there any TIPM TCM Power Control Circuit DTCs present also?
Ye s>>
Refer to the Transmission category and perform the appropriate diagnostic procedure.
No>>
Go To 2
2.CHECK IF THE DTC IS CURRENT
With the scan tool, view DTCs.
Is the status Active or is STARTS SINCE SET counter set at 0 for this DTC?
Ye s>>
Go To 3
No>>
Go To 7
3.CHECK THE PCM AND WIRING USING THE TRANSMISSION SIMULATOR
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 scan tool, actuate the L/R Solenoid.

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