Dodge Dakota (R1). Manual — part 866

Symptom:

*CHECKING RADIATOR FAN OPERATION WITH NO DTC’S

POSSIBLE CAUSES

FUSED B(+) CIRCUIT OPEN

RADIATOR FAN GROUND CIRCUIT OPEN

RAD FAN MOTOR

RADIATOR FAN RELAY OUTPUT CIRCUIT OPEN

RADIATOR FAN RELAY

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, actuate the Radiator Fan Relay.

Does the Radiator Fan Motor cycle on and off?

All

Yes

→

Test Complete.

No

→

Go To

2

2

Turn the ignition on.
With the DRBIII

t, actuate the Radiator Fan Relay.

Using a 12-volt Test Light connected to ground, backprobe the Radiator Fan Relay
Output circuit in the Radiator Fan Motor harness connector.
Does the test light cycle on and off?

All

Yes

→

Go To

3

No

→

Go To

5

3

Turn the ignition off.
Disconnect the Radiator Fan Motor harness connector.
Measure the resistance between ground and the Radiator Fan Motor Ground circuit.
Is the resistance below 5.0 ohms?

All

Yes

→

Go To

4

No

→

Repair the open Radiator Fan Ground Circuit.

4

If there are no possible causes remaining, view repair.

All

Repair

Replace the Radiator Fan Motor.

5

Turn the ignition off.
Disconnect the Radiator Fan Relay Connector.
Using a 12-volt Test Light connected to ground, check the Fused B(+) circuit in the
Radiator Fan Relay connector.
Did the light illuminate brightly?

All

Yes

→

Go To

6

No

→

Repair the open Fused B(+) Circuit (check Radiator Fan Fuse in
PDC).

196

DRIVEABILITY - GAS

TEST

ACTION

APPLICABILITY

6

Turn the ignition off.
Disconnect the Radiator Fan Motor harness connector.
Remove Rad Fan Relay.
Measure the resistance of the Radiator Fan Relay Output circuit.
Is the resistance below 5.0 ohms?

All

Yes

→

Go To

7

No

→

Repair the open Radiator Fan Relay Output Circuit.

7

If there are no possible causes remaining, view repair.

All

Repair

Replace the Radiator Fan Relay.

197

DRIVEABILITY - GAS

*CHECKING RADIATOR FAN OPERATION WITH NO DTC’S —

Continued

Symptom:

*CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR

POSSIBLE CAUSES

ECT SENSOR OPERATION

ECT SENSOR

TEST

ACTION

APPLICABILITY

1

NOTE: The engine coolant temperature must be below 62°C (150°F).
Turn the ignition on.
With the DRBIII

t, monitor the ECT value.

Start the engine.
Does the ECT reach 82°C (180°F) and was it a smooth transition?

All

Yes

→

Test Complete.

No

→

Replace the Engine Coolant Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 2.

198

DRIVEABILITY - GAS

Symptom:

*CHECKING THE INTAKE AIR TEMPERATURE SENSOR

POSSIBLE CAUSES

IAT SENSOR OPERATION

IAT SENSOR

TEST

ACTION

APPLICABILITY

1

NOTE: Do not allow more than 5 minutes delay during the removal of the
IAT sensor and measure the temperature.
Turn the ignition on.
With the DRBIII

t, read and record the IAT temperature value.

Remove the IAT sensor.
Using a temperature probe, measure the temperature inside the opening of the IAT
sensor.
Compare both temperature readings.
Are the temperature readings with 12°C (10°F) of one another?

All

Yes

→

Test Complete.

No

→

Replace the IAT sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 2.

199

DRIVEABILITY - GAS