Chrysler PT Cruiser. Manual — part 256
TEST
ACTION
APPLICABILITY
6
NOTE: Inspect the slots on the crank, tone wheel, for damage. If a problem
is found repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace the Crankshaft Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
7
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Measure the resistance between ground and the (K24) CKP Sensor Signal circuit at
the CKP Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K24) CKP Sensor Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the (K24) CKP Sensor Signal circuit from the CKP Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the open in the (K24) CKP Sensor Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
9
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (K24) CKP Sensor Signal circuit in the CKP Sensor
harness connector.
Is the voltage above 4.7 volts?
All
Yes
→ Repair the short to voltage in the (K24) CKP Sensor Signal
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 10
10
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance between the (K24) CKP Sensor Signal circuit and the (K7)
5-volt Supply circuit in the CKP Sensor harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the short to (K7) 5-volt Supply circuit in the (K24) CKP
Sensor Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 11
114
DRIVEABILITY - 1.6L GAS
P0335-NO CRANK SIGNAL AT PCM —
Continued
TEST
ACTION
APPLICABILITY
11
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.
12
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the CKP Sensor harness connector.
Measure the resistance between ground and the (K7) 5-volt Supply circuit at the CKP
Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K7) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 13
13
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance of the (K7) 5-volt Supply circuit between the CKP Sensor
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 14
No
→ Repair the open in the (K7) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
14
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (K7) 5-volt Supply circuit in the CKP Sensor harness
connector.
Is the voltage above 5.0 volts?
All
Yes
→ Repair the short to voltage in the (K7) 5 Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 15
15
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.
115
DRIVEABILITY - 1.6L GAS
P0335-NO CRANK SIGNAL AT PCM —
Continued
Symptom:
P0336-CRANKSHAFT POSITION SENSOR PERFORMANCE
When Monitored and Set Condition:
P0336-CRANKSHAFT POSITION SENSOR PERFORMANCE
When Monitored:
With the engine running and no CMP Sensor DTCs.
Set Condition:
If the PCM detects an incorrect amount of Crankshaft Sensor pulses when
compared to the Camshaft Sensor pulses, it will set this DTC.
POSSIBLE CAUSES
CHECKING INTERMITTENT CMP SIGNAL WITH LAB
WIRING HARNESS INSPECTION
TONE WHEEL/PULSE RING INSPECTION
WIRING HARNESS INSPECTION
TONE WHEEL/PULSE RING INSPECTION
CHECKING INTERMITTENT CKP SIGNAL WITH LAB
CAMSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
With the DRBIII
t in the Dual Channel Lab Scope function and the Miller special tool
#6801, backprobe the (K44) CMP Signal circuit in the CMP harness connector and
PCM harness connector.
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.
Observe the lab scope screen.
Are there any irregular or missing signals?
All
Yes
→ Go To 2
No
→ Go To 5
2
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.
Ensure the Crankshaft Position Sensor and the Camshaft Position Sensor are
properly installed and the mounting bolt(s) tight.
Refer to any TSB that may apply.
Were any of the above conditions present?
All
Yes
→ Repair as necessary
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 3
116
DRIVEABILITY - 1.6L GAS
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Remove the Camshaft Position Sensor.
Inspect the Tone Wheel/Pulse Ring for damage, foreign material, or excessive
movement.
Were any problems found?
All
Yes
→ Repair or replace the Tone Wheel/Pulse Ring as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 4
4
If there are no possible causes remaining, view repair.
All
Repair
Replace the Camshaft Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
5
Turn the ignition off.
With the DRBIII
t Lab Scope in the Dual Channel function and the Miller special tool
#6801, backprobe the (K44) CMP Signal circuit in the PCM harness connector and in
the CMP harness connector.
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.
Carefully wiggle the related wire harness and gently tap on the CMP sensor.
Observe the lab scope screen.
Look for any differences in the two patterns generated by the CMP Sensor.
If the Channel 1 and Channel 2 patterns match and are erratic the Crank Position
Sensor may need to be replaced.
Is one pattern different than the other?
All
Yes
→ Repair the wiring/connection concern.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
No
→ Go To 6
6
Turn the ignition off.
With the DRBIII
t in the Dual Channel Lab Scope function and the Miller special tool
#6801, backprobe the (K24) CKP Signal circuit in the CKP harness connector and
PCM harness connector.
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.
Observe the lab scope screen.
Are there any irregular or missing signals?
All
Yes
→ Go To 7
No
→ Go To 10
117
DRIVEABILITY - 1.6L GAS
P0336-CRANKSHAFT POSITION SENSOR PERFORMANCE —
Continued
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