Chrysler PT Cruiser. Manual — part 290

TEST

ACTION

APPLICABILITY

5

Turn the ignition off.
Remove the Radiator Fan Relay from the PDC.
Disconnect the Radiator Fan harness connector.
Measure the resistance of the Radiator Fan Relay Output circuit between the PDC
and the Radiator Fan harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the Radiator Fan Relay.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

No

→ Repair the Radiator Fan Relay Output circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

250

DRIVEABILITY - 1.6L GAS

*CHECKING RADIATOR FAN RELAY OUTPUT —

Continued

Symptom:

*CHECKING THE A/C RELAY OUTPUT

POSSIBLE CAUSES

A/C CLUTCH RELAY OPERATION

GROUND CIRCUIT OPEN

A/C CLUTCH

FUSED B+ CIRCUIT

A/C CLUTCH OUTPUT CIRCUIT

A/C CLUTCH RELAY

TEST

ACTION

APPLICABILITY

1

NOTE: Ensure that the refrigerant system is properly charged. Refer to the
appropriate Service Information.
Turn the ignition on.
With the DRBIII

t, actuate the A/C Clutch Relay.

Is the A/C Clutch actuating?

All

Yes

→ The A/C Clutch System operating properly at this time.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

No

→ Go To 2

2

Turn the ignition off.
Disconnect the A/C Clutch harness connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit in the A/C
Clutch harness connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 3

No

→ Repair the Ground circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

3

Disconnect the A/C Clutch harness connector.
Turn the ignition on.
With the DRBIII

t, actuate the A/C Clutch Relay.

Using a 12-volt test light connected to ground, check the A/C Clutch Relay Output
circuit in the A/C Clutch harness connector.
Does the test light illuminate brightly?

All

Yes

→ Replace the A/C Clutch.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

No

→ Go To 4

4

Turn the ignition off.
Remove the A/C Clutch Relay from the PDC.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the PDC.
Does the test light illuminate brightly?

All

Yes

→ Go To 5

No

→ Repair the Fused B+ circuit. Inspect fuses and replace as neces-

sary.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

251

DRIVEABILITY - 1.6L GAS

TEST

ACTION

APPLICABILITY

5

Turn the ignition off.
Disconnect the A/C Clutch Relay from the PDC.
Disconnect the A/C Clutch harness connector.
Measure the resistance of the A/C Clutch Relay Output circuit between the PDC and
the A/C Clutch harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the A/C Clutch Relay.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

No

→ Repair the A/C Clutch Relay Output circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - 1.6L.

252

DRIVEABILITY - 1.6L GAS

*CHECKING THE A/C RELAY OUTPUT —

Continued

Symptom:

*SPEED CONTROL SWITCH TEST 1.6L

POSSIBLE CAUSES

INTERMITTENT CONDITION

S/C SW CKT SHORT TO VOLTAGE

S/C SW CKT OPEN

S/C SW CKT TO S/C SWITCH

SPEED CONTROL SWITCH

PCM

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t in Sensors, read the S/C SWITCH STATUS.

While monitoring the S/C SWITCH STATUS, move the Speed Control switch to each
position, i.e., On/Off, Coast/Set, Cancel, etc.
The S/C SWITCH STATUS should change appropriately as the switch is moved to
each position.
Does the Status change appropriately as the Speed Control switch is moved to each
position?

All

Yes

→ Go To 2

No

→ Go To 3

2

NOTE: The following list may help in identifying an intermittent condition.
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.
Start the engine.
With the DRBIII

t in Sensors, monitor the S/C Switch Status while wiggle testing the

related wiring harness. Look for parameter values to change and/or a DTC to set.
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.
Refer to any Technical Service Bulletins (TSB) that may apply.
Were any of the above conditions present?

All

Yes

→ Repair as necessary

Perform POWERTRAIN VERIFICATION TEST VER - 4.

No

→ Test Complete.

3

Turn the ignition off.
Disconnect the Clockspring harness connector.
Turn the ignition on, engine not running.
Measure the voltage of the Speed Control Switch circuit at the Clock Spring harness
connector.
Is the voltage between 4.8 and 5.2 volts?

All

Yes

→ Go To 4

No

→ Go To 6

253

DRIVEABILITY - 1.6L GAS