Dodge Caliber. Manual — part 116
3.
CHECK (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT VOLTAGE
Disconnect the Left Rear WSS harness connector.
Turn the ignition on.
Measure the voltage of the (B4) Left Rear WSS 12 Volt Supply circuit.
Is the voltage above 10.0 volts?
Yes
>> Go To 6
No
>> Go To 4
4.
CHECK (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Left Rear WSS harness connector.
Disconnect the Anti-Lock Brake Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B4) Left Rear
WSS Supply circuit.
Does the test light illuminate brightly?
Yes
>> Repair the (B4) Left Rear WSS Supply circuit for a short to
ground.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
No
>> Go To 5
5.
CHECK (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT FOR AN OPEN
Connect a jumper wire between ground and the (B4) Left Rear WSS
Supply circuit in the Anti-Lock Brakes Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B4) Left Rear
WSS Supply circuit.
Does the test light illuminate brightly?
Yes
>> Replace the Anti-Lock Brakes Module in accordance with
the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
No
>> Repair the (B4) Left Rear WSS Supply circuit for an open.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
PM
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 165
6.
CHECK (B3) LEFT REAR WSS SIGNAL CIRCUIT FOR A SHORT TO GROUND
Using a 12-volt test light connected to 12-volts, probe the (B3) Left Rear
WSS Signal circuit.
Does the test light illuminate brightly?
Yes
>> Repair the (B3) Left Rear WSS Signal circuit for a short to
ground.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
No
>> Go To 7
7.
CHECK (B3) LEFT REAR WSS SIGNAL CIRCUIT FOR AN OPEN
Connect a jumper wire between ground and the (B3) Left Rear WSS
Signal circuit in the Anti-Lock Brakes Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B3) Left Rear
WSS Signal circuit.
Does the test light illuminate brightly?
Yes
>> Go To 8
No
>> Repair the (B3) Left Rear WSS Signal circuit for an open.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
8.
CHECK (B3) LEFT REAR WSS SIGNAL CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
Remove all jumper wires.
Measure the voltage between the (B3) Left Rear WSS Signal circuit and
ground.
Is the voltage above one volt?
Yes
>> Repair the (B3) Left Rear WSS Signal circuit for a short to
voltage.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
No
>> Go To 9
5 - 166
BRAKES - ABS ELECTRICAL DIAGNOSTICS
PM
9.
CHECK (B3) LEFT REAR WSS SIGNAL CIRCUIT AND (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT
SHORTED TOGETHER
Turn the ignition off.
Measure the resistance between the (B3) Left Rear WSS Signal circuit
and the (B4) Left Rear WSS Supply circuit.
Is the resistance above 5.0 ohms?
Yes
>>
Go To 10
No
>> Repair the (B3) Left Rear WSS Signal circuit and the (B4)
Left Rear WSS Supply circuit for a short together.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES -
STANDARD PROCEDURE).
10.
LEFT REAR WHEEL SPEED SENSOR
Replace the Left Rear Wheel Speed Sensor in accordance with the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
WARNING: To avoid personal injury or death, check brake capability is available before road testing.
Road test the vehicle over 40 km/h (25 m.p.h.).
NOTE: Vehicle must be driven above 40 km/h (25 m.p.h.) for set conditions to be meet.
With the scan tool, read ABS DTCs.
NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at 12 km/h (7.5 mph) before it will extinguish
the ABS indicators.
Did DTC C1020–LEFT REAR WHEEL SPEED SENSOR CIRCUIT reset?
Yes
>> Replace the Anti-Lock Brakes Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Test Complete.
PM
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 167
C1027-LEFT REAR WHEEL SPEED SENSOR SIGNAL ERRATIC PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Left Rear WSS Signal is intermittently missing a vehicle speed above 25mph (40 kph) or erratic
wheel speed signal during acceleration or sensed wheel speed is different from other wheels.
Possible Causes
LEFT REAR WSS AIR GAP FAULT
LEFT REAR WSS LOOSE — B3, B4 CIRCUITS/CONNECTOR/TERMINAL DAMAGE
LEFT REAR TONE WHEEL DAMAGE
LEFT REAR WHEEL BEARING DAMAGE
IMPROPER LEFT REAR TIRE PRESSURE/MISMATCHED TIRES
LEFT REAR WSS
ANTI-LOCK BRAKE MODULE
Diagnostic Test
1.
CHECK FOR DTC C1027-LEFT REAR WHEEL SPEED SENSOR SIGNAL ERRATIC PERFORMANCE
NOTE: This DTC must be active for the results of this test to be valid.
Turn the ignition on.
With the scan tool, record and erase DTCs.
Road test the vehicle over 40 km/h (25 m.p.h.).
NOTE: Vehicle must be driven above 40 km/h (25 m.p.h.) for set conditions to be meet.
With the scan tool, read DTCs.
NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at 12 km/h (7.5 mph) before it will extinguish
the ABS indicators.
Does the scan tool display: C1027-LEFT REAR WHEEL SPEED SENSOR SIGNAL ERRATIC PERFOR-
MANCE?
Yes
>> Go To 2
No
>> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TEST-
ING)
2.
CHECK LEFT REAR WSS AIR GAP
Turn the ignition off.
Using a feeler gauge, measure the Left Rear WSS air gap.
NOTE: Refer to the appropriate service information, if necessary, for procedures or specifications.
Is the Left Rear WSS air gap within specifications?
Yes
>> Go To 3
No
>> Repair as necessary.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
5 - 168
BRAKES - ABS ELECTRICAL DIAGNOSTICS
PM
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