Dodge Neon / Neon SRT-4. Manual — part 570

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Measure the resistance of the Low Speed Radiator Fan Relay between the Fused
Ignition Switch Output terminal and the Low Speed Rad Fan Relay Control
terminal.
Is the resistance between 60 to 85 ohms?

All

Yes

→ Go To 4

No

→ Replace the Low Speed Radiator Fan Relay.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

4

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (C24) Low Speed Rad Fan Relay Control circuit from
the PDC to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 5

No

→ Repair the open in the (C24) Low Speed Rad Fan Relay Control

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

5

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (C24) Low Speed Rad Fan Control
circuit at the PDC.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (C24) Low Speed Rad Fan Relay

Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 6

6

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
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 POWERTRAIN VERIFICATION TEST VER - 5.

185

DRIVEABILITY - NGC

P0480-COOLING FAN 1 CONTROL CIRCUIT —

Continued

Symptom:

P0481-COOLING FAN 2 CONTROL CIRCUIT (NON-TURBO)

When Monitored and Set Condition:

P0481-COOLING FAN 2 CONTROL CIRCUIT (NON-TURBO)

When Monitored:

With the ignition on. Battery voltage greater than 10 volts.

Set Condition:

An open or shorted circuit is detected in the radiator fan relay control

circuit. One trip Fault.

POSSIBLE CAUSES

HIGH SPEED RADIATOR FAN RELAY OPERATION

(A110) FUSED IGNITION SWITCH OUTPUT CIRCUIT

HIGH SPEED RADIATOR FAN RELAY RESISTANCE

(C27) HIGH SPEED RAD FAN RELAY CONTROL CIRCUIT OPEN

(C27) HIGH SPEED RAD FAN RELAY CONTROL CIRCUIT SHORT TO GROUND

PCM

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, actuate the High Speed Radiator Fan Relay.

Is the High Speed Radiator Fan Relay operating?

All

Yes

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 2

2

Turn the ignition off.
Remove the High Speed Radiator Fan Relay from the PDC.
Turn the ignition on.
Measure the voltage of the (A110) Fused Ignition Switch Output circuit in the PDC.
Is the voltage above 11.0 volts?

All

Yes

→ Go To 3

No

→ Repair the (A110) Fused Ignition Switch Output circuit. Check

and replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

186

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Remove the High Speed Radiator Fan Relay from the PDC.
Measure the resistance of the High Speed Radiator Fan Relay between the Fused
Ignition Switch Output terminal and the High Speed Rad Fan Relay Control
terminal.
Is the resistance between 60 to 85 ohms?

All

Yes

→ Go To 4

No

→ Replace the High Speed Radiator Fan Relay.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

4

Turn the ignition off.
Remove the High Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (C27) High Speed Rad Fan Relay Control circuit from
the PDC to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 5

No

→ Repair the open in the (C27) High Speed Rad Fan Relay Control

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

5

Turn the ignition off.
Remove the High Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (C27) High Speed Rad Fan Relay
Control circuit in the PDC.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the short to ground in the (C27) High Speed Rad Fan

Relay Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 6

6

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.

All

Repair

NOTE: Before continuing, check the PCM harness connector
terminals for corrosion, damage or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

187

DRIVEABILITY - NGC

P0481-COOLING FAN 2 CONTROL CIRCUIT (NON-TURBO) —

Continued

Symptom:

P0481-COOLING FAN 2 CONTROL CIRCUIT (TURBO)

When Monitored and Set Condition:

P0481-COOLING FAN 2 CONTROL CIRCUIT (TURBO)

When Monitored:

With the ignition on. Battery voltage greater than 10 volts.

Set Condition:

An open or shorted circuit is detected in the radiator fan relay control

circuits. One Trip Fault.

POSSIBLE CAUSES

RADIATOR FAN RELAYS 2 AND 3 OPERATION

FUSED IGNITION SWITCH OUTPUT CIRCUIT

RADIATOR FAN RELAY #2 CONTROL CIRCUIT OPEN BEFORE THE SPLICE

RADIATOR FAN RELAY #3 CONTROL CIRCUIT OPEN BEFORE SPLICE

RADIATOR FAN RELAY CONTROL CIRCUITS SHORT TO GROUND

RADIATOR FAN RELAY CONTROL CIRCUIT OPEN AFTER THE SPLICE

RADIATOR FAN RELAY #2 OR #3

PCM

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, actuate the High Speed Radiator Fan Relay.

Are both Radiator Fan operating at high speed?

All

Yes

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 2

2

Turn the ignition off.
Remove both of the Radiator Fan Relays (#2 and #3) from the PDC.
Turn the ignition on.
NOTE: A voltage measurement must be taken at both Radiator Fan Relay
Fused Ignition Switch Output circuits in the PDC.
Measure the voltage of the Fused Ignition Switch Output circuit at the radiator Fan
Relay connector in the PDC.
Is the voltage above 11.0 volts at both relay connectors?

All

Yes

→ Go To 3

No

→ Repair the Fused Ignition Switch Output circuit. Check and

replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

188

DRIVEABILITY - NGC