Dodge Dakota (R1). Manual - part 889

TEST

ACTION

APPLICABILITY

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Disconnect the Transmission Solenoid Assembly harness connector.
Ignition on, engine not running.
Measure the voltage of the Governor Pressure Solenoid Control circuit.
Is the voltage above 0.5 volt?

All

Yes

→

Repair the Governor Solenoid Control circuit for a short to
voltage.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Go To

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Disconnect the Transmission Solenoid Assembly harness connector.
Remove the Transmission Control Relay.
Check connectors - Clean/repair as necessary
Measure the resistance between the Governor Pressure Solenoid Control circuit and
all other circuits in the Transmission Solenoid Assembly harness connector.
Is the resistance below 100 kohms between any two circuits?

All

Yes

→

Repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Go To

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Remove the Transmission Control Relay.
Measure the resistance of the Governor Pressure Solenoid Control circuit between
the PCM harness connector and the Transmission Control Relay Output circuit
connector.
Is the resistance between 3.0 ohms and 6.0 ohms

All

Yes

→

Go To

→

Replace the Transmission Solenoid Assembly in accordance with
the Service Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the Governor Pressure Solenoid Control circuit and
ground.
Is the resistance below 5.0 ohms?

All

Yes

→

Repair or Replace the Transmission Solenoid Assembly for a short
to ground.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Go To

288

TRANSMISSION

P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
NOTE: Resistance between the Governor Pressure Solenoid Control circuit
and the listed circuits should be 28 to 68 ohms.
Measure the resistance between the Governor Pressure Solenoid Control circuit and
the...
* TCC Solenoid Control circuit in the PCM harness connector.
* 3-4 shift Solenoid Control circuit in the PCM harness connector.
Is the resistance of both measurements within the range of 28 to 68 ohms?

All

Yes

→

Go To

→

Replace Transmission Solenoid Assembly per Service Informa-
tion.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

Turn the ignition off to the lock position.
Disconnect the PCM harness connectors.
Remove the Transmission Control Relay.
Check connectors - Clean/repair as necessary
NOTE: Resistance between the Governor Pressure Solenoid circuit and the
listed circuits should not be below 100 kohms.
Measure the resistance between the Governor Pressure Solenoid Control circuit and
the...
* Transmission 5-volt supply circuit in the C2 PCM harness connector.
* Sensor Ground circuit in the C2 PCM harness connector.
* Transmission Temp Sensor Signal circuit in the PCM harness connector.
* Governor Pressure Sensor Signal circuit in the PCM harness connector.
Are the resistance values for any of the above listed circuits below 100 kohms?

All

Yes

→

Replace Transmission Solenoid Assembly per Service Informa-
tion.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Go To

If there are no possible causes remaining, view repair.

All

Repair

Replace the Powertrain Control Module in accordance with the
Service Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

At this time, the conditions required to set the DTC are not present.
NOTE: Use the Freeze Frame Data to help duplicate the conditions that set
the DTC. Pay particular attention to the DTC set conditions, such as, VSS,
MAP, ECT, and Load.
NOTE: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, broken, bent, pushed out, corroded terminals, or partially
broken wires.
NOTE: Refer to any technical service bulletins that may apply.
Were any problems found?

All

Yes

→

Repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Test Complete.

289

TRANSMISSION

P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS —

Continued

Symptom:

P0751-O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES

When Monitored and Set Condition:

P0751-O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES

When Monitored:

The engine must have been running for a minimum of 10 seconds. The

test for this code is executed every 440ms.

Set Condition:

This code will set if the Overdrive Off switch is held low for 5 minutes or

more from the time of switch closure or ignition on.

POSSIBLE CAUSES

INTERMITTENT O/D OFF SWITCH

O/D OFF SWITCH SENSE CIRCUIT SHORTED TO GROUND

OVERDRIVE OFF SWITCH

PCM - O/D OFF

TEST

ACTION

APPLICABILITY

With the DRBIII

t, read DTCs.

Is the Good Trip Counter for P0751 displayed and equal to 0?

All

Yes

→

Go To

→

Go To

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the O/D Off Switch harness connector.
Measure the resistance between ground and the O/D off switch sense circuit in the
PCM harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→

Repair the O/D OFF switch sense circuit for a short to ground.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Go To

Turn the ignition off.
Disconnect the PCM C3 harness connector.
Measure the resistance between ground and the O/D off switch sense circuit in the
PCM C3 harness connector.
Press the O/D Off switch button.
Does the resistance change from above 5.0 ohms to below 5.0 ohms while pressing the
O/D Off Switch?

All

Yes

→

Go To

→

Replace the O/D Off Switch in accordance with the Service
Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

290

TRANSMISSION

TEST

ACTION

APPLICABILITY

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

At this time, the conditions required to set the DTC are not present.
Note: Use the Freeze Frame Data to help duplicate the conditions that set
the DTC. Pay particular attention to the DTC set conditions, such as, VSS,
MAP, ECT, and Load.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any technical service bulletins that may apply.
Were any problems found?

All

Yes

→

Repair as necessary.
Perform TRANSMISSION VERIFICATION TEST VER - 1.

→

Test Complete.

291

TRANSMISSION

P0751-O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES —

Continued

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