Jeep Grand Cherokee WK. Manual — part 175
C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW (CONTINUED)
For the Anti-Lock Brake System circuit diagram. (Refer to 5 - BRAKES - SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Anti-Lock Brake Module indicates that the Brake Pressure Sensor Signal is within the low fault area.
Possible Causes
TERMINAL/CONNECTOR/WIRING HARNESS DAMAGE
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO THE (B84) BRAKE PRESSURE SENSOR
SIGNAL CIRCUIT
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO THE (B986) BRAKE PRESSURE
SENSOR RETURN CIRCUIT
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE, GROUND, OR OPEN
ANTI-LOCK BRAKE MODULE
Diagnostic Test
1.
CHECK FOR A DTC C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW
NOTE: This DTC must be active for the results of this test to be valid.
Turn the ignition on.
With the scan tool, read and record DTC’s.
With the scan tool, read and record Freeze Fame information.
With the scan tool, erase DTC’s.
Cycle the ignition from off to on.
With the scan tool, read and record DTC’s.
Does the scan tool display: C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION diagnostic procedure.
Perform ABS VERIFICATION TEST - VER 1.
2.
CHECK THE TERMINALS/CONNECTORS/WIRING HARNESS FOR DAMAGE
Check all related wiring for bruised, chafed, pierced, or partially broken wires.
Check all related connectors for broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 3
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
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C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW (CONTINUED)
3.
CHECK THE VOLTAGE ON THE (B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the Brake Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (B83) Brake Pressure Sensor Supply cir-
cuit.
Is the voltage above 4 volts?
Yes
>> Go To 7
No
>> Go To 4
4.
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO THE (B84) BRAKE PRESSURE
SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Measure the resistance between the (B83) Brake Pressure Sensor
Supply circuit and the (B84) Brake Pressure Sensor Signal circuit.
Is the resistance below 150 ohms?
Yes
>> Repair the (B83) Brake Pressure Sensor Supply circuit for
a short to the (B84) Brake Pressure Sensor Signal circuit.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 5
5.
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO THE (B986) BRAKE PRESSURE
SENSOR RETURN CIRCUIT
Measure the resistance between the (B83) Brake Pressure Sensor
Supply circuit and the (B986) Brake Pressure Sensor Return circuit.
Is the resistance below 150 ohms?
Yes
>> Repair the (B83) Brake Pressure Sensor Supply circuit for
a short to the (B986) Brake Pressure Sensor Return cir-
cuit.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 6
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C2111-SENSOR SUPPLY VOLTAGE CIRCUIT LOW (CONTINUED)
6.
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (B83) Brake Pressure
Sensor Supply circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (B83) Brake Pressure Sensor Supply circuit for
a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 7
7.
(B83) BRAKE PRESSURE SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
Measure the voltage of the (B83) Brake Pressure Sensor Supply cir-
cuit.
Is there any voltage present?
Yes
>> Repair the (B83) Brake Pressure Sensor Supply circuit for
a short to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 8
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 329
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