Dodge Ram Truck 1500-2500-3500. Manual — part 1703

P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS) (CONTINUED)

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 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 original set conditions.
With the scan tool, read Engine DTCs.

Did the DTC reset?

Yes

>> Go To 3

No

>> Go To 13

3.

CHECK THE (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT

Turn the ignition off to the lock position.

Disconnect the Transmission Solenoid Assembly harness connector.

NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.

With the scan tool, actuate the Transmission Control Relay.

Using a 12-volt test light connected to ground, check the (T16) Trans-
mission Control Relay Output circuit in the Transmission Solenoid
Assembly harness connector.

NOTE: The test light must illuminate brightly. Compare the bright-
ness to that of a direct connection to the battery.

Does the test light cycle on and off and illuminate brightly?

Yes

>> Go To 4

No

>> Go To 10

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

DR/DH

P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS) (CONTINUED)

4.

CHECK THE 3-4 SHIFT SOLENOID

With the scan tool, actuate the Overdrive (3-4) Solenoid.

Using a 12-volt test light connected to 12-volts, check the (T9) 3-4
Shift Solenoid Control circuit in the Transmission Solenoid Assembly
harness connector.

Does the test light cycle on and off and illuminate brightly?

Yes

>> Check all internal wiring pertaining to the 3-4 Shift Sole-

noid for an open, short, and bent or broken terminals. If no
internal wiring problems are found, replace the Transmis-
sion Solenoid Assembly per the Service Information.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC
- 48RE/VALVE BODY - REMOVAL)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

No

>> Go To 5

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.

Measure the voltage of the (T9) 3-4 Solenoid Control circuit.

Is the voltage above 0.5 volts?

Yes

>> Repair the (T9) 3-4 Solenoid Control circuit for a short to

voltage.

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

No

>> Go To 6

DR/DH

AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS) (CONTINUED)

6.

CHECK THE (T9) 3-4 SOLENOID CONTROL CIRCUIT FOR AN OPEN

Turn the ignition off to the lock position.

Measure the resistance of the (T9) 3-4 Solenoid Control circuit
between the Transmission Solenoid Assembly harness connector and
the PCM C2 harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 7

No

>> Repair the (T9) 3-4 Solenoid Control circuit for an open.

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

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
Control circuit.

Is the resistance above 100k ohms?

Yes

>> Go To 8

No

>> Repair the (T9) 3-4 Solenoid Control circuit for a short to

ground.

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

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AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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P0753-TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS (GAS) (CONTINUED)

8.

CHECK THE (T9) 3-4 SHIFT SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Measure the resistance between the (T9) 3-4 Solenoid Control circuit
and all other circuits in the PCM C1 and C2 harness connectors.

Is the resistance above 100k ohms between the (T9) 3-4 Sole-
noid Control circuit and any other circuit(s) in the PCM C1 or
C2 harness connectors?

Yes

>> Go To 9

No

>> Repair the (T9) 3-4 Shift Solenoid Control circuit for a

short to another circuit(s).

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

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 light connected to 12-volts, check the (T9) 3-4
Solenoid Control circuit in the Transmission Solenoid Assembly har-
ness connector.

Does the test Light cycle on and off and illuminate brightly?

Yes

>> Go To 13

No

>> Perform RE TRANSMISSION VERIFICATION TEST VER -

1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 48RE - STANDARD PROCEDURE)

Perform RE TRANSMISSION VERIFICATION TEST VER -
1 (GAS). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCE-
DURE)

DR/DH

AUTOMATIC TRANSMISSION - 48RE - GAS - ELECTRICAL DIAGNOSTICS

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