2006 DODGE RAM SRT-10 Service Repair Manual

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Page 3745 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual Theory of Operation
The transmission throttle valve cable has been replace by the transmission throttle valve actuator (TTVA). The TTVA
consists of an electric DC motor, two potentiometers, and a gear

Theory of Operation
The transmission throttle valve cable has been replace by the transmission throttle valve actuator (TTVA). The TTVA
consists of an electric DC motor, two potentiometers, and a gear drive system. The TTVA is mechanically connected
to the transmission throttle valve in the valve body by the “D” shaped opening in the bottom of the TTVA shaft.
The Transmission Throttle Valve Actuator (TTVA) does not require any mechanical adjustments. All changes in throt-
tle valve position are controlled by the Engine Control Module (ECM).
The TTVA does require an initialization period after the actuator has beenremoved or replaced. After the actuator
has been removed or replaced, move the ignition to the ON position for thirty (30) seconds. This will allow the ECM
sufficient time to perform the internal calibration procedures to learn the TTVA’s current “zero” position.
When Monitored:
Continuously with the ignition on.
Set Condition:
The current detected on the TTVA circuit is greater than a threshold for a calibrated amount of time or the
feedback to the controller does not match the intended state.
Possible Causes
(F856) 5 VOLT SUPPLY CIRCUIT OPEN
(K314) TTVA MOTOR (+) CIRCUIT OPEN
(K315) TTVA MOTOR (-) CIRCUIT OPEN
(K314) TTVA MOTOR (+) CIRCUIT SHORT TO GROUND
(K315) TTVA MOTOR (-) CIRCUIT SHORT TO GROUND
(K314) TTVA MOTOR (+) CIRCUIT SHORT TO VOLTAGE
(K315) TTVA MOTOR (-) CIRCUIT SHORT TO VOLTAGE
(K314) TTVA MOTOR (+) CIRCUIT SHORT TO ANOTHER CIRCUIT
(K315) TTVA MOTOR (-) CIRCUIT SHORT TO ANOTHER CIRCUIT
INTERNAL TRANSMISSION
TRANSMISSION THROTTLE VALVE ACTUATOR
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.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 ignition off to the lock position.
Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.
NOTE: It may be necessary to road test the vehicle to duplicate the originalset conditions.
With the scan tool, read Engine DTCs.
Did the DTC reset?
Ye s>>
Go To 2
No>>
Go To 12

Page 3746 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 2.CHECK THE TTVA
Turn the ignition off to the lock position.
Disconnect the TTVA harness connector
Connect a 12-volt test light between the (K314) TTVA Motor (+) circuit
and the (K315) TTVA Motor (-)

Page 3747 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 4.CHECK THE (K314) TTVA MOTOR (+) CIRCUIT FOR AN OPEN
Turn the ignition off to the lock position.
Disconnect the ECM C1 and C2 harness connectors.
Measure the resistance of the (K314) TTVA Motor (+) c

Page 3748 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 6.CHECK THE (K314) TTVA MOTOR (+) CIRCUIT FOR A SHORT TO GROUND
Measure the resistance between ground and the (K314) TTVA Motor (+)
circuit.
Is the resistance below 5.0 ohms?
Ye s>>
Repair the (K314)

Page 3749 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 8.CHECK THE (K315) TTVA MOTOR (-) CIRCUIT FOR A SHORT TO VOLTAGE
Measure the voltage of the (K315) TTVA Motor (-) circuit.
Is the voltage above 0.5 volts?
Ye s>>
Repair the (K315) TTVA Motor (-) circu

Page 3750 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 10.CHECK THE (K315) TTVA MOTOR (-) CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
Measure the resistance between the (K315) TTVA Motor (-) circuit and
every other circuit in the ECM C1 and C2 harness connecto

Page 3751 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 12.INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set.

Page 3752 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual P1756-GOV PRESS NOT EQUAL TO TARGET @ 35 - 40 PSI (DIESEL)
For a complete wiring diagramRefer to Section 8W

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