Chrysler PT Cruiser. Manual - part 262

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (G7) Vehicle Speed Sensor Signal circuit in the VSS
harness connector to ground.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (G7) Vehicle Speed Sensor

Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

→ Go To 7

Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (G7) Vehicle Speed Sensor Signal circuit between the
VSS harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 8

→ Repair the open in the (G7) Vehicle Speed Sensor Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

NOTE: Before Continuing: Disconnect the PCM harness connector and
check the related wiring terminals for corrosion, damage or terminal push
out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
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 - 1.6L.

138

DRIVEABILITY - 1.6L GAS

P0500-NO VEHICLE SPEED SENSOR SIGNAL —

Continued

Symptom:

P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED

When Monitored and Set Condition:

P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED

When Monitored:

With the engine running at idle, MAF <250 mg/tdc, air temp >-17.8°C

(0°F) and <-7°C (19.4°F) enable after coolant temp >70°C (158°F) or air temp >-7°C
(19.4°F), coolant temp >-7°C (19.4°F) <130°C (266°F), canister purge <100% duty cycle,
and no VSS, MAF/MAP, ECT, TPS, ETC, CRK Sensor DTCs nor any fuel system or injector
DTCs.

Set Condition:

Engine speed is 100 RPM or more below idle speed for 7 seconds.

POSSIBLE CAUSES

AIR INDUCTION SYSTEM

THROTTLE BODY OPERATION

INTERMITTENT CONDITION

PCM

TEST

ACTION

APPLICABILITY

NOTE: If any other DTC’s are present, they must be diagnosed and repaired
before continuing this test.
Turn the ignition on, engine not running.
With the DRBIII

t, read DTC’s.

Does the Good Trip Indicator display NO?

All

Yes

→ Go To 2

→ Go To 5

Inspect the Air Induction System for the following problems.
Restrictions: Dirty Air Cleaner, Foreign material trap in the air intake tube, etc.
Leaks: Air Intake tube connection, Air Cleaner housing, etc.
Were any problems found?

All

Yes

→ Repair or replace as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

→ Go To 3

139

DRIVEABILITY - 1.6L GAS

TEST

ACTION

APPLICABILITY

Inspect the throttle body plate for carbon build up or other restrictions.
Inspect the throttle cable between the Accelerator Pedal and APPS is not binding and
has smooth operation.
Ensure the throttle plate is in the idle position.
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.
While the vehicle is running, lightly tap on ETC Motor, with your hand, and listen for
idle to raise.
Were any problems found?

All

Yes

→ Repair or replace as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

→ Go To 4

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the 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.
With the engine running at normal operating temperature, monitor the DRBIII

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 DRBIII

t Freeze Frame information. 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 POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

→ Test Complete.

140

DRIVEABILITY - 1.6L GAS

P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED —

Continued

Symptom:

P0507-IDLE SPEED PERFORMANCE HIGHER THAN EXCEPTED

When Monitored and Set Condition:

P0507-IDLE SPEED PERFORMANCE HIGHER THAN EXCEPTED

When Monitored:

With the engine running at idle, MAF <250 mg/tdc, air temp >-17.8°C

Set Condition:

Engine speed is 200 RPM or more above idle speed for 7 seconds.

POSSIBLE CAUSES

AIR INDUCTION SYSTEM

VACUUM LEAKS

THROTTLE BODY OPERATION

INTERMITTENT CONDITION

PCM

TEST

ACTION

APPLICABILITY

NOTE: If any other DTC’s are present, they must be diagnosed and repaired
before continuing this test.
Turn the ignition on, engine not running.
With the DRBIII

t, read DTC’s.

Does the Good Trip Indicator display NO?

All

Yes

→ Go To 2

→ Go To 6

All

Yes

→ Repair or replace as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.

→ Go To 3

Start the engine.
Inspect the vehicle for external vacuum leaks.
Inspect the engine for internal leaks.
Were any vacuum leaks found?