Chrysler PT Cruiser. Manual - part 153

TEST

ACTION

APPLICABILITY

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→ Repair as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

→ Test Complete.

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the ASD Relay Output circuit.
Did the test light illuminate brightly?

All

Yes

→ Go To 4

→ Repair the ASD Relay Output circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Install a substitute relay in place of the Low Speed Radiator Fan Relay.
Turn the ignition on.
With the DRB, actuate the Low Speed Fan Relay.
Is the Low Speed Radiator Fan Relay clicking?

All

Yes

→ Replace the Low Speed Radiator Fan Relay.

Perform ROAD TEST VERIFICATION - VER-2.

→ Go To 5

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Low Speed Radiator Fan Control
circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 6

→ Repair the Low Speed Radiator Fan Control circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

DRIVEABILITY - DIESEL

P0480-FAN 1 CONTROL CIRCUIT OPEN CIRCUIT —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Disconnect the ECM harness connectors.
Measure the resistance of the Low Speed Radiator Fan Control circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 7

→ Repair the Low Speed Radiator Fan Control circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

DRIVEABILITY - DIESEL

P0480-FAN 1 CONTROL CIRCUIT OPEN CIRCUIT —

Continued

Symptom:

P0480-FAN 1 CONTROL CIRCUIT SHORT CIRCUIT

When Monitored and Set Condition:

P0480-FAN 1 CONTROL CIRCUIT SHORT CIRCUIT

When Monitored:

With the ignition on and the ECM attempting to actuate the Radiator

Fan Relay 1.

Set Condition:

The ECM detects excessive current on the Radiator Fan Relay 1 Control

circuit when attempting to actuate the Radiator Fan Relay 1.

POSSIBLE CAUSES

INTERMITTENT CONDITION

LOW SPEED RADIATOR FAN RELAY

LOW SPEED RADIATOR FAN CONTROL CIRCUIT SHORTED TO VOLTAGE

ENGINE CONTROL MODULE

TEST

ACTION

APPLICABILITY

NOTE: If the ECM detects and stores a DTC, the ECM also stores the
engine/vehicle operating conditions under which the DTC was set. Some of
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the DRB, actuate the Low Speed Radiator Fan Relay.
Is the Low Speed Radiator Fan Relay clicking?

All

Yes

→ Go To 2

→ Go To 3

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

All

Yes

→ Repair as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

→ Test Complete.

Turn the ignition off.
Install a substitute relay in place of the Low Speed Radiator Fan Relay.
Turn the ignition on.
With the DRB, actuate the Low Speed Radiator Fan Relay.
Is the Low Speed Radiator Fan Relay clicking?

All

Yes

→ Replace the Low Speed Radiator Fan Relay.

Perform ROAD TEST VERIFICATION - VER-2.

→ Go To 4

Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the Low Speed Radiator Fan Relay from the PDC.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the Low Speed Radiator Fan Control circuit.
Is the voltage below 1.0 volt?

All

Yes

→ Go To 5

→ Repair the Low Speed Radiator Fan Control circuit for a short to

voltage.
Perform ROAD TEST VERIFICATION - VER-2.

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

DRIVEABILITY - DIESEL

P0480-FAN 1 CONTROL CIRCUIT SHORT CIRCUIT —

Continued

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