Chrysler PT Cruiser. Manual — part 119
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Disconnect the ABM harness connector.
Disconnect the affected Wheel Speed Sensor connector.
Connect a jumper wire between affected Wheel Speed Sensor 12 Volt Supply circuit
and ground.
Using a 12-volt test light connected to 12-volts, probe the affected Wheel Speed
Sensor 12 Volt Supply circuit.
Does the test light illuminate?
All
Yes
→ Go To 6
No
→ Repair the affected Wheel Speed Sensor 12 Volt Supply circuit for
an open.
Perform ABS VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the affected Wheel Speed Sensor connector.
NOTE: Check connector - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage between affected Wheel Speed Sensor Signal circuit and ground.
Is the voltage above 1 volt?
All
Yes
→ Repair the affected Wheel Speed Sensor Signal circuit for a short
to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 7
7
Turn the ignition off.
Disconnect the ABM harness connector.
Disconnect the affected Wheel Speed Sensor connector.
Using a 12-volt test light connected to 12-volts, probe the affected Wheel Speed
Sensor Signal circuit.
Does the test light illuminate?
All
Yes
→ Repair the affected Wheel Speed Sensor Signal circuit for a short
to ground.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the ABM harness connector.
Disconnect the affected Wheel Speed Sensor connector.
Connect a jumper wire between affected Wheel Speed Sensor Signal circuit and
ground.
Using a 12-volt test light connected to 12-volts, probe the affected Wheel Speed
Sensor Signal circuit.
Does the test light illuminate?
All
Yes
→ Go To 9
No
→ Repair the affected Wheel Speed Sensor Signal circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
19
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT —
Continued
TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Remove the ABM harness strain relief to access wires.
Reconnect the ABM harness connector.
Turn the ignition on.
Measure the voltage between affected Wheel Speed Sensor 12 Volt Supply circuit and
ground.
Is the voltage above 10 volts?
All
Yes
→ Go To 10
No
→ Replace the Anti-Lock Brake Module in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
10
Turn the ignition off.
Remove the ABM harness strain relief to access wires.
Reconnect the ABM harness connector.
Turn the ignition on.
Measure the voltage between affected Wheel Speed Sensor 12 Volt Supply circuit and
affected Wheel Speed Sensor Signal circuit.
Is the voltage above 10 volts?
All
Yes
→ Go To 11
No
→ Replace the Anti-Lock Brake Module in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
11
Turn the ignition off.
Reconnect ALL affected Wheel Speed Sensor circuit connectors.
Disconnect the affected Wheel Speed Sensor connector.
Turn the ignition on.
Measure the voltage of the affected Wheel Speed Sensor 12 Volt Supply circuit in the
affected Wheel Speed Sensor connector while reconnecting the sensor connector.
Did the affected Wheel Speed Sensor 12 Volt Supply circuit drop voltage to 0 DC
volts?
All
Yes
→ Replace the affected Wheel Speed Sensor in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 12
12
Turn the ignition off.
Reconnect ALL affected Wheel Speed Sensor circuit connectors.
Turn the ignition on.
Measure the DC voltage of the Wheel Speed Sensor Signal circuit in the affected
Wheel Speed Sensor connector.
Slowly rotate the wheel.
Does the DC voltage toggle between 1.6 volts to .8 volts?
All
Yes
→ Go To 13
No
→ Replace the affected Wheel Speed Sensor in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
20
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT —
Continued
TEST
ACTION
APPLICABILITY
13
Turn the ignition off.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
All
Yes
→ Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Test Complete.
21
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT —
Continued
Symptom List:
LEFT FRONT WHEEL SPEED SENSOR SIGNAL
LEFT REAR WHEEL SPEED SENSOR SIGNAL
RIGHT FRONT WHEEL SPEED SENSOR SIGNAL
RIGHT REAR WHEEL SPEED SENSOR SIGNAL
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT FRONT WHEEL SPEED
SENSOR SIGNAL.
When Monitored and Set Condition:
LEFT FRONT WHEEL SPEED SENSOR SIGNAL
When Monitored:
Ignition On - Continuously
Set Condition:
When the ABM detects the following on the wheel speed sensor signal
circuit: missing signal, continuously low wheel speed, changes erratically, periodic drop out
of a wheel speed, and too long of pressure reduction during an ABS event.
LEFT REAR WHEEL SPEED SENSOR SIGNAL
When Monitored:
Ignition On - Continuously
Set Condition:
When the ABM detects the following on the wheel speed sensor signal
circuit: missing signal, continuously low wheel speed, changes erratically, periodic drop out
of a wheel speed, and too long of pressure reduction during an ABS event.
RIGHT FRONT WHEEL SPEED SENSOR SIGNAL
When Monitored:
Ignition On - Continuously
Set Condition:
When the ABM detects the following on the wheel speed sensor signal
circuit: missing signal, continuously low wheel speed, changes erratically, periodic drop out
of a wheel speed, and too long of pressure reduction during an ABS event.
RIGHT REAR WHEEL SPEED SENSOR SIGNAL
When Monitored:
Ignition On - Continuously
Set Condition:
When the ABM detects the following on the wheel speed sensor signal
circuit: missing signal, continuously low wheel speed, changes erratically, periodic drop out
of a wheel speed, and too long of pressure reduction during an ABS event.
POSSIBLE CAUSES
WHEEL SPEED SENSOR SIGNAL DTC PRESENT
AFFECTED WHEEL SPEED SENSOR SIGNAL INOPERATIVE
AFFECTED WHEEL SPEED SENSOR CONNECTOR DAMAGED
AFFECTED WHEEL SPEED SENSOR TONE WHEEL DAMAGED
22
BRAKES (25E)
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