2006 DODGE RAM SRT-10 Service Repair Manual

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Page 3553 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual Theory of Operation
The Tow/haul Overdrive OFF (control) Switch is located in the shift lever arm. The switch is a momentary contact
device that signals the PCM to toggle current status of the overdri

Theory of Operation
The Tow/haul Overdrive OFF (control) Switch is located in the shift lever arm. The switch is a momentary contact
device that signals the PCM to toggle current status of the overdrive function. At ignition on, overdrive operation is
allowed. Pressing the Tow/Haul Overdrive Off switch once causes the Tow/haul Overdrive OFF mode to be entered
and the Tow/Haul lamp to be illuminated. Pressing the switch a second time causes normal overdrive operation to
be restored and the Tow/haul lamp to be turned off. The Tow/haul Overdrive OFF mode defaults to ON after the
ignition switch is cycled OFF and ON. Thenormal position for the control switch is the ON position. The switch must
be in this position to energize the solenoid and allow a 3-4 upshift. The control switch indicator light illuminates only
when the Tow/haul Overdrive Off switch is turned to the OFF position, or when illuminated by the transmission con-
trol module.
When Monitored:
The engine must have been running for at minimum of 10 seconds. The circuit is tested every 440ms.
Set Condition:
This DTC will set if the Tow/Haul Overdrive Off Switch Sense circuit is heldlow for 5 minutes or more from the
time of switch closure or ignition on with the engine running.
Possible Causes
TOW/HAUL OVERDRIVE OFF SWITCH SENSE CIRCUIT SHORT TO GROUND
TOW/HAUL OVERDRIVE OFF SWITCH
ENGINE CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1.TOW/HAUL OVERDRIVE OFF SWITCH SENSE CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the PCM C3 harness connector.
Disconnect the Tow/Haul OverdriveOff switch harness connector.
Measure the resistance between ground and the Tow/Haul Overdrive
Off switch sense circuit in the PCM C3 harness connector.
Is the resistance below 5.0 ohms?
Ye s>>
Repair the Tow/Haul Overdrive Off switch sense circuit for a
short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 48RE - STANDARD PROCEDURE)
No>>
Go To 2

Page 3554 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 2.CHECK THE TOW/HAUL OVERDRIVE OFF SWITCH
Reconnect the Tow/Haul Overdrive Off switch harness connector.
Measure the resistance between ground and the O/D Tow/Haul Switch
Sense circuit in the PCM C3 h

Page 3555 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS)
For a complete wiring diagramRefer to Section 8W

Page 3556 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual Theory of Operation
The 3-4 Solenoid is used the engage the gear change form 3rd gear to 4th gear.
The solenoids used in transmission applications are attached to valves which can be classified as nor

Theory of Operation
The 3-4 Solenoid is used the engage the gear change form 3rd gear to 4th gear.
The solenoids used in transmission applications are attached to valves which can be classified as normally open or
normally closed. The normally open solenoid valve is defined as a valve which allows hydraulic flow when no cur-
rent or voltage is applied to the solenoid. The normally closed solenoid valve is defined as a valve which does not
allow hydraulic flow when no current or voltage is applied to the solenoid.These valves perform hydraulic control
functions for the transmission and must therefore be durable and tolerantof dirt particles. For these reasons, the
valves have hardened steel poppets and ball valves. The solenoids operatethe valves directly, which means that
the solenoids must have very high outputs to close the valves against the sizable flow areas and line pressures
found in current transmissions. Fastresponse time is also necessary to ensure accurate control.
When Monitored:
Continuously with ignition on.
Set Condition:
This DTC will set if the voltage detected on the 3-4 Shift Solenoid Control circuit at the PCM is different then
the expected voltage. Note: To clear this DTC it is necessary to drive the vehicle at a sustained speed which
would allow the TCC and/or Overdrive Clutch to operate
Possible Causes
TRANSMISSION CONTROL OUTPUT DTC PRESENT
(T9) 3-4 SOLENOID CONTROL CIRCUIT OPEN
(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
(T9) 3-4 SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
(T9) 3-4 SOLENOID CONTROL CIRCUIT SHORT TO GROUND
(T16) TRANSMISSION RELAY OUTPUT CIRCUIT SHORT TO GROUND
(T9) 3-4 SOLENOID CIRCUIT SHORT TO OTHER CIRCUITS
TOTALLY INTEGRATED POWER MODULE
3-4 SHIFT SOLENOID
POWERTRAIN CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1.CHECK IF THERE ANY TRANSMISSION CONTROL DTCS PRESENT
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Are there any TIPM TCM Power Control Circuit DTCs also present?
Ye s>>
Refer to the Transmission category, and perform the appropriate symptom(s).
No>>
Go To 2

Page 3557 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 2.CHECK IF THE DTC IS CURRENT
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Record the Freeze Frame data for the reported DTC.
With the scan tool, erase DTCs.
Turn the ignitio

Page 3558 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 5.CHECK THE (T9) 3-4 SOLENOID CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off to the lock position.
Disconnect the PCM C1 and C2 harness connectors.
Ignition on, engine not running.
Measu

Page 3559 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 7.CHECK THE (T9 ) 3-4 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND
Measure the resistance between ground and the (T9) 3-4 Solenoid Con-
trol circuit.
Is the resistance above 100k ohms?
Ye s>>
Go To

Page 3560 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 9.CHECK THE POWERTRAIN CONTROL MODULE
Reconnect the PCM harness connectors.
Turn the ignition on, engine not running.
With the scan tool, actuate the 3-4 (Overdrive) Solenoid.
Using a 12-volt test lig

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