Chrysler RG Voyager. Manual — part 428

TEST

ACTION

APPLICABILITY

6

Turn the ignition on.
With the DRB, actuate the Low Speed Rad Fan and observe the Radiator Fans.
NOTE: Both Radiator Fans should operate at low speed.
Did both Radiator Fans operate properly?

All

Yes

→ Go To 7

Fans do not operate on Low

Go To

15

Fan 1 on High/Fan 2 not on

Go To

23

Fan 1 not on/Fan 2 on High

Go To

26

7

Turn the ignition on.
With the DRB, actuate the High and Low Speed Rad Fans at the same time and
observe the Radiator Fans.
NOTE: Both Radiator Fans should operate at high speed.
Did both Radiator Fans operate properly?

All

Yes

→ The test is complete. Ensure the ECM will turn the fans on when

the engine is hot.
Perform ROAD TEST VERIFICATION - VER-2.

Fan 1 on High/ Fan 2 not on

Go To

8

Fan 1 not on/Fan 2 on High

Go To

11

8

Turn the ignition off.
Disconnect the Radiator Fan Relay No.2 harness connector.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Did the test light illuminate brightly?

All

Yes

→ Go To 9

No

→ Repair the Radiator Fan Relay No.2 Fused B+ circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

9

Turn the ignition off.
Install a substitute relay in place of Radiator Fan Relay No. 2.
Turn the ignition on.
With the DRB, actuate the High Speed Fan Relay.
Does Radiator Fan No. 2 cycle on and off?

All

Yes

→ Replace Radiator Fan Relay No. 2.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 10

215

DRIVEABILITY - DIESEL

*CHECKING THE ELECTRIC RADIATOR FAN OPERATION —

Continued

TEST

ACTION

APPLICABILITY

10

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 2 harness connector.
Disconnect the Radiator Fan No. 2 harness connector.
Measure the resistance of the Radiator Fan Relay No. 2 and No. 3 Common Output
circuit from Radiator Fan Relay No. 2.
Is the resistance below 10.0 ohms?

All

Yes

→ Test Complete.

No

→ Repair the Radiator Fan Relay No. 2 and No. 3 Common Output

circuit from Radiator Fan Relay No. 2 for an open.
Perform ROAD TEST VERIFICATION - VER-2.

11

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Did the test light illuminate brightly?

All

Yes

→ Go To 12

No

→ Repair the Radiator Fan Relay No. 3 Fused B+ circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

12

Turn the ignition off.
Install a substitute relay in place of Radiator Fan Relay No. 3.
Turn the ignition on.
With the DRB, actuate the High Speed Fan Relay and then actuate the Low Speed
Fan Relay.
Does Radiator Fan No. 2 cycle on and off and then both fans cycle on and off when
requested?

All

Yes

→ Replace Radiator Fan Relay No. 3.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 13

13

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the Radiator Fan No. 2 harness connector.
Using a 12-volt test light connected to 12-volts, check the Radiator Fan Relay No. 3
Ground circuit at the Radiator Fan Relay No. 3 harness connector.
Did the test light illuminate brightly?

All

Yes

→ Go To 14

No

→ Repair the Radiator Fan Relay No. 3 Ground circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

14

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the High Speed Radiator Fan Dual Relay Control circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Test Complete.

No

→ Repair the High Speed Radiator Fan Dual Relay Control circuit

for an open.
Perform ROAD TEST VERIFICATION - VER-2.

216

DRIVEABILITY - DIESEL

*CHECKING THE ELECTRIC RADIATOR FAN OPERATION —

Continued

TEST

ACTION

APPLICABILITY

15

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 1 harness connector.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Did the test light illuminate brightly?

All

Yes

→ Go To 16

No

→ Repair the Radiator Fan Relay No. 1 Fused B+ circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

16

Turn the ignition off.
Install a substitute relay in place of Radiator Fan Relay No.1.
Turn the ignition on.
With the DRB, actuate the Low Speed Fan Relay.
Do both Radiator Fans cycle on and off?

All

Yes

→ Replace Radiator Fan Relay No.1.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 17

17

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the Radiator Fan No. 2 harness connector.
Using a 12-volt test light connected to 12-volts, check the Radiator Fan Relay No. 3
Ground circuit at the Radiator Fan Relay No. 3 harness connector.
Did the test light illuminate brightly?

All

Yes

→ Go To 18

No

→ Repair the Radiator Fan Relay No. 3 Ground circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

18

Turn the ignition off.
Disconnect the Radiator Fan Relay No.1 harness connector.
Disconnect the Radiator Fan No.1 harness connector.
Using a 12-volt test light connected to 12-volts, check the Radiator Fan Relay No.1
Output circuit in the Radiator Fan Relay No.1 harness connector.
Did the test light illuminate brightly?

All

Yes

→ Repair the Radiator Fan Relay No.1 Output circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 19

19

Turn the ignition off.
Disconnect the Radiator Fan Relay No.1 harness connector.
Disconnect the Radiator Fan No.1 harness connector.
Measure the resistance of the Radiator Fan Relay No.1 Output circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 20

No

→ Repair the Radiator Fan Relay No.1 Output circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

217

DRIVEABILITY - DIESEL

*CHECKING THE ELECTRIC RADIATOR FAN OPERATION —

Continued

TEST

ACTION

APPLICABILITY

20

Turn the ignition off.
Disconnect the Radiator Fan Relay No.3 harness connector.
Disconnect the Radiator Fan No.1 harness connector.
Measure the resistance of the Radiator Fan No.1 Control circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 21

No

→ Repair the Radiator Fan No.1 Control circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

21

Turn the ignition off.
Disconnect the Radiator Fan Relay No.3 harness connector.
Disconnect the Radiator Fan No.2 harness connector.
Measure the resistance of the Radiator Fan Relay No.2 and No.3 Common Output
circuit from Radiator Fan Relay No.3.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 22

No

→ Repair the Radiator Fan Relay No.2 and No.3 Common Output

circuit from Radiator Fan Relay No.3 for an open.
Perform ROAD TEST VERIFICATION - VER-2.

22

Turn the ignition off.
Disconnect the Radiator Fan No. 1 harness connector.
Connect a fused jumper wire between the Radiator Fan No. 1 harness connector
cavities.
Turn the ignition on.
With the DRB, actuate the Low Speed Fan Relay.
Did Radiator Fan No. 2 activate on High speed?

All

Yes

→ Replace Radiator Fan No. 1.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Replace Radiator Fan No.2.

Perform ROAD TEST VERIFICATION - VER-2.

23

NOTE: Radiator Fan No. 2 is fed voltage from Radiator Fan Relay No. 3
during low speed operation and then fed voltage from Radiator Fan Relay
No. 2 during high speed operation by a common circuit connected to both
relays.
Turn the ignition off.
Disconnect the Radiator Fan Relay No. 2 harness connector.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the Radiator Fan No. 2 harness connector.
Measure the resistance between ground and the Radiator Fan Relay No. 2 and No. 3
Common Output circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 24

No

→ Repair the Radiator Fan Relay No. 2 and No. 3 Common Output

circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.

218

DRIVEABILITY - DIESEL

*CHECKING THE ELECTRIC RADIATOR FAN OPERATION —

Continued