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Antilock Brake System (ABS) - Electrical Diagnostics: Other Dodge Dart PF

Anti-Lock/traction Control 5 illustrations ~3749 words

WHEN MONITORED

With the ignition on and no system under voltage condition present.

SET CONDITION

OPEN CIRCUIT: The Anti-lock Brake System (ABS) Module has detected improper voltage level when the motor is not running.

LOCKED MOTOR: The Anti-lock Brake System (ABS) Module is not seeing the proper response when motor is running.

POSSIBLE CAUSES

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

With the ignition on and no system under voltage condition present.

The motor voltage supplied to the Anti-lock Brake System (ABS) Module is 50 percent of ignition voltage.

Possible Causes
FUSE F04 (40A)
(A107) FUSED B+ CIRCUIT SHORTED TO GROUND
(A107) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
(Z909) GROUND CIRCUITS OPEN OR HIGH RESISTANCE
INTEGRATED CONTROL UNIT (ICU)

With the ignition on and no system under voltage condition present.

If the Anti-lock Brake System (ABS) Module detects that the pump motor has a poor ground or the ABS has internal pump motor driver shorted, this DTC will be active.

Possible Causes
FUSE F04 (40A)
(A107) FUSED B+ CIRCUIT SHORTED TO GROUND
(A107) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
(Z909) GROUND CIRCUITS OPEN OR HIGH RESISTANCE
INTEGRATED CONTROL UNIT (ICU)

Scheme 9

Scheme 9: DIAGNOSTIC TEST

Scheme 10

Scheme 10

Scheme 11

Scheme 11
  1. CHECK THE FUSE Ignition on, engine not running. Using a 12-volt test light connected to ground, check the fuse for power. Is the fuse good? Yes Go To 3 No Go To 2
  2. (A107) FUSED B+ CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Remove the F04 40A Fuse. Disconnect the ABS Module harness connector. Measure the resistance between Ground and the (A107) Fused B+ Circuit in the ABS Module harness connector. Is the resistance above 5.0 Ohms? Yes Go To 3 No Repair the (A107) Fused B+ circuit for a short to ground. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  3. ABS PUMP MOTOR Install the F04 40A Fuse. Ignition on, engine not running. With the scan tool, read and record the DTCs. With the scan tool, actuate the ABS pump motor. Did the Pump Motor operate correctly when actuated with out blowing the fuse? Yes Go To 4 No Go To 6
  4. (A107) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE Turn the ignition off to the lock position. Disconnect the ABS Module harness connector. Using a 12-volt test light connected to ground, check the (A107) Fused B+ circuit. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 5 No Repair the (A107) Fused B+ circuit for an open circuit or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  5. (Z909) GROUND CIRCUITS OPEN OR HIGH RESISTANCE Using a 12-volt test light connected to 12-volts, check the (Z909) Ground circuits. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 6 No Repair the (Z909) Ground circuit(s) for an open circuit or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  6. INTEGRATED CONTROL UNIT (ICU) Turn the ignition off to the lock position. Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) . No Replace the Integrated Control Unit (ICU) in accordance with the Service Information. Refer to «INTEGRATED CONTROL UNIT (ICU), REMOVAL»(ref-646223-S33976230812014072800000) . Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .

With the ignition on and no system under voltage condition present.

If the Anti-lock Brake System (ABS) Module detects that the pump motor has a poor ground or the ABS has internal pump motor driver shorted, this DTC will be active.

Possible Causes
(A107) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
(Z909) GROUND CIRCUITS OPEN OR HIGH RESISTANCE
INTEGRATED CONTROL UNIT (ICU)

Scheme 12

Scheme 12
  1. VERIFY THE DTC IS ACTIVE 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 the DTCs. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set. With the scan tool, erase the DTCs. CAUTION: Make sure brake capability is available before road testing. Road test the vehicle above 16 km/h (10 mph). With the scan tool, read and record the DTCs. Is the DTC active at this time? Yes Go To 2 No Perform the ABS INTERMITTENT CONDITION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  2. (A107) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE Turn the ignition off to the lock position. Disconnect the ABS Module harness connector. Using a 12-volt test light connected to ground, check the (A107) Fused B+ circuit. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 3 No Repair the (A107) Fused B+ circuit for an open circuit or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  3. (Z909) GROUND CIRCUITS OPEN OR HIGH RESISTANCE Using a 12-volt test light connected to 12-volts, check the (Z909) Ground circuits. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 4 No Repair the (Z909) Ground circuit(s) for an open circuit or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  4. INTEGRATED CONTROL UNIT (ICU) Turn the ignition off to the lock position. Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) . No Replace the Integrated Control Unit (ICU) in accordance with the Service Information. Refer to «INTEGRATED CONTROL UNIT (ICU), REMOVAL»(ref-646223-S33976230812014072800000) . Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .

With the ignition on.

When the Vacuum Pressure Sensor indicates a failure in the Vacuum Booster. After the cold start phase (i.e. 3 min after engine is running) and if the engine is running above 600 RPM there should be at least -135 mbar (-1.96 psi) of differential pressure in the vacuum-chamber for boosting the pedal force. If the pressure remains below this value for more than two minutes. Timer resets if the pressure remains above 220 mbar (3.19 psi) for 10 seconds or engine off vehicle speed present and low booster vacuum present.

Possible Causes
ENGINE STALLED WHILE ROLLING IN NEUTRAL
PINCHED, CUT OR OPEN VACUUM SUPPLY LINE
BRAKE BOOSTER
VACUUM PRESSURE SENSOR

With the ignition on.

When the Anti-Lock Brake Module detects periodic drops of a WSS signal.

Possible Causes
LEFT FRONT TONE WHEEL/ BEARING DAMAGE
IMPROPER LEFT FRONT TIRE PRESSURE/MISMATCHED TIRES
DIRTY TONE WHEEL/SENSOR

With the ignition on and no system under voltage or over voltage condition present.

When the Left Front Wheel Speed Sensor circuit fails the diagnostic test.

Possible Causes
CONNECTOR/TERMINAL DAMAGE
(B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
(B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
(B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
(B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT
LEFT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on and no system under voltage or over voltage condition present.

When the Anti-lock Brake System (ABS) Module detects multiple drastic changes in Left Front wheel speed.

Possible Causes
CHECK LEFT FRONT WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
LEFT FRONT WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
LEFT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on, no system under voltage or over voltage condition present, no open or shorted wheel speed sensor DTCs set, vehicle not under high acceleration, and vehicle speed greater than 0.

This DTC will be set if the wheel speed signal is 0 km/h (0 mph) or very low when compared to the other wheel speed signals.

Possible Causes
IMPROPER LEFT FRONT TIRE PRESSURE/MISMATCHED TIRES
CHECK LEFT FRONT WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
LEFT FRONT HUB AND WHEEL BEARING
LEFT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on.

When the Anti-Lock Brake Module detects periodic drops of a WSS signal.

Possible Causes
RIGHT FRONT TONE WHEEL/BEARING DAMAGE
IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES
DIRTY TONE WHEEL/SENSOR

With the ignition on and no system under voltage or over voltage condition present.

When the Right Front Wheel Speed Sensor circuit fails the diagnostic test.

Possible Causes
CONNECTOR/TERMINAL DAMAGE
(B6) RIGHT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B7) RIGHT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B6) RIGHT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(B7) RIGHT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
(B6) RIGHT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
(B7) RIGHT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
(B7) RIGHT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B6) RIGHT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT
RIGHT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on and no system under voltage or over voltage condition present.

When the Anti-lock Brake System (ABS) Module detects multiple drastic changes in Right Front wheel speed.

Possible Causes
CHECK RIGHT FRONT WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
RIGHT FRONT WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
RIGHT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on, no system under voltage or over voltage condition present, no open or shorted wheel speed sensor DTCs set, vehicle not under high acceleration, and vehicle speed greater than 0.

This DTC will be set if the wheel speed signal is 0 km/h (0 mph) or very low when compared to the other wheel speed signals.

Possible Causes
IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES
CHECK RIGHT FRONT WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
RIGHT FRONT WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
RIGHT FRONT WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on.

When the Anti-Lock Brake Module detects periodic drops of a WSS signal.

Possible Causes
LEFT REAR TONE WHEEL/BEARING DAMAGE
IMPROPER LEFT REAR TIRE PRESSURE/MISMATCHED TIRES
AXLE SHAFT FASTENER HARDWARE
DIRTY TONE WHEEL/SENSOR

With the ignition on and no system under voltage or over voltage condition present.

When the Left Rear Wheel Speed Sensor circuit fails the diagnostic test.

Possible Causes
CONNECTOR/TERMINAL DAMAGE
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
(B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
(B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT
LEFT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on.

When the Anti-lock Brake System (ABS) Module detects multiple drastic changes in Left Rear wheel speed.

Possible Causes
CHECK LEFT REAR WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
LEFT REAR WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
LEFT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on, no system under voltage or over voltage condition present, no open or shorted wheel speed sensor DTCs set, vehicle not under high acceleration, and vehicle speed greater than 0.

This DTC will be set if the wheel speed signal is 0 km/h (0 mph) or very low when compared to the other wheel speed signals.

Possible Causes
IMPROPER LEFT REAR TIRE PRESSURE/MISMATCHED TIRES
CHECK LEFT REAR WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
LEFT REAR WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
LEFT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on.

When the Anti-Lock Brake Module detects periodic drops of a WSS signal.

Possible Causes
RIGHT REAR TONE WHEEL/BEARING DAMAGE
IMPROPER RIGHT REAR TIRE PRESSURE/MISMATCHED TIRES
AXLE SHAFT FASTENER HARDWARE
DIRTY TONE WHEEL/SENSOR

C003A-1D-RIGHT REAR WHEEL SPEED SENSOR - CIRCUIT CURRENT OUT OF RANGE

For a complete wiring diagram Refer to the appropriate Wiring Information .

With the ignition on and no system under voltage or over voltage condition present.

When the Right Rear Wheel Speed Sensor circuit fails the diagnostic test.

Possible Causes
CONNECTOR/TERMINAL DAMAGE
(B1) RIGHT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B2) RIGHT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B1) RIGHT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(B2) RIGHT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
(B1) RIGHT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
(B2) RIGHT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
(B2) RIGHT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B1) RIGHT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT
RIGHT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C003A-2F-RIGHT REAR WHEEL SPEED SENSOR - SIGNAL ERRATIC

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on and no system under voltage or over voltage condition present.

When the Anti-lock Brake System (ABS) Module detects multiple drastic changes in Right Rear wheel speed.

Possible Causes
CHECK RIGHT REAR WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
RIGHT REAR WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
RIGHT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C003A-62-RIGHT REAR WHEEL SPEED SENSOR - SIGNAL COMPARE FAILURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on, no system under voltage or over voltage condition present, no open or shorted wheel speed sensor DTCs set, vehicle not under high acceleration, and vehicle speed greater than 0.

This DTC will be set if the wheel speed signal is 0 km/h (0 mph) or very low when compared to the other wheel speed signals.

Possible Causes
IMPROPER RIGHT REAR TIRE PRESSURE/MISMATCHED TIRES
CHECK RIGHT REAR WHEEL SPEED SENSOR FOR LOOSENESS
INSPECT CIRCUITS/CONNECTOR/TERMINALS FOR DAMAGE
RIGHT REAR WHEEL BEARING AND HUB OR ENCODER FOR DAMAGE
RIGHT REAR WHEEL SPEED SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Monitoring conditions

The brake switch rationality checks both failure modes of the brake switch. The brake switch stuck on test checks for a high vehicle speed condition where the brake switch is continually depressed. The brake switch stuck off test checks for brake pressure present with the brake switch saying not pressed.

Possible Causes
STOPLAMP SWITCH INSTALLATION/ADJUSTMENT
BODY CONTROL MODULE (BCM) DTCs
POWERTRAIN CONTROL MODULE (PCM) DTCS
(B134) BRAKE SWITCH NO. 2 SIGNAL CIRCUIT SHORTED TO GROUND
(B134) BRAKE SWITCH NO. 2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(B135) BRAKE SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
STOPLAMP SWITCH
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Monitoring conditions

The brake switch rationality checks both failure modes of the brake switch. The brake switch stuck on test checks for a high vehicle speed condition where the brake switch is continually depressed. The brake switch stuck off test checks for brake pressure present with the brake switch saying not pressed.

Possible Causes
STOPLAMP SWITCH INSTALLATION/ADJUSTMENT
BODY CONTROL MODULE (BCM) DTCs
POWERTRAIN CONTROL MODULE (PCM) DTCS
(B135) BRAKE SWITCH 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
STOPLAMP SWITCH
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on.

When the Anti-Lock Brake Module indicates that the Brake Pressure Sensor Signal is out of range.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
HYDRAULIC CONTROL UNIT (HCU)

Ignition on.

The Anti-lock Brake System (ABS) Module has detected brake pressure when the brake pedal has not been applied.

Possible Causes
BRAKE FLUID CONTAMINATION
STOP LAMP SWITCH INSTALLATION/ADJUSTMENT
PINCHED OR BENT BRAKE LINES
STOP LAMP SWITCH
POWER BRAKE BOOSTER
INTEGRATED CONTROL UNIT (ICU)

Ignition on.

When a new Integrated Control Unit (ICU) has been installed on the vehicle and/or the brake pedal calibration routine was not ran or failed.

Possible Causes
BRAKE PEDAL CALIBRATION NOT PERFORMED
HYDRAULIC CONTROL UNIT (HCU)/INTEGRATED CONTROL UNIT (ICU)

With the ignition on.

When the Anti-Lock Brake Module indicates that the redundant brake pressure sensor elements do not agree.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
HYDRAULIC CONTROL UNIT (HCU)
INTEGRATED CONTROL UNIT (ICU)

With ignition on, but not if a CAN time out failure is detected.

If the Anti-lock Brake System (ABS) Module detects a Steering Angle Sensor overtravel above 720 degrees.

Possible Causes
STEERING WHEEL ALIGNMENT
STEERING COLUMN OR INTERMEDIATE SHAFT IMPROPERLY INSTALLED OR DAMAGED
STEERING ANGLE SENSOR (SAS) LOOSE
STEERING CONTROL MODULE (SCM)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

Driving straight with speeds above 15 km/h (9 mph).

If the Anti-lock Brakes System (ABS) Module detects that the sensor signal is showing to great of a value while driving straight.

Possible Causes
STEERING WHEEL ALIGNMENT
STEERING COLUMN OR INTERMEDIATE SHAFT IMPROPERLY INSTALLED OR DAMAGED
STEERING ANGLE SENSOR (SAS) LOOSE
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

When the Anti-lock Brake System (ABS) Module detects that a new Steering Angle Sensor has been placed on the vehicle, but it has not been calibrated.

Note. The Steering Angle Sensor (SAS) is internal to the Steering Gear.

Possible Causes
STEERING ANGLE SENSOR (SAS) LOOSE OR WIRING HARNESS DAMAGE
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

When vehicle speed is above 15 km/h (9 mph) and the Yaw rate, lateral acceleration, steering angle and vehicle-speed are all valid.

When the Anti-lock Brake System (ABS) Module detects that the Electronic Stability Control (ESC) calculated Steering Angle does not match the sensor signal from the Steering Control Module (SCM).

Possible Causes
STEERING WHEEL ALIGNMENT
STEERING COLUMN OR INTERMEDIATE SHAFT IMPROPERLY INSTALLED OR DAMAGED
STEERING ANGLE SENSOR (SAS) LOOSE
CLOCKSPRING (SAS)
STEERING CONTROL MODULE (SCM)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

When the Anti-lock Brake System (ABS) Module detects that one of the Dynamics Sensors offset levels are above reasonable levels.

Note. The Dynamics Sensor is internal to the Occupant Restraint Controller (ORC).

Possible Causes
LONGITUDINAL G-SENSOR ROUTINE PERFORMED INCORRECTLY
OCCUPANT RESTRAINT CONTROLLER (ORC) INSTALLATION
OCCUPANT RESTRAINT CONTROLLER (ORC)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

C006A-49-MULTI-AXIS ACCELERATION SENSOR - INTERNAL ELECTRONIC FAILURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Ignition on.

The Dynamics Sensor has indicated that it has detected an internal failure.

Note. The Dynamics Sensor is internal to the Occupant Restraint Controller (ORC).

Possible Causes
OCCUPANT RESTRAINT CONTROLLER (ORC)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

Note. If DTC U0002-88 is present, perform the diagnostics for this DTC before continuing with this test.

Ignition on.

When the Anti-lock Brake System (ABS) Module detects that the Dynamics Sensor has not been calibrated.

Note. The Dynamics Sensor is internal to the Anti-lock Brake System (ABS) Module.

Possible Causes
DYNAMICS SENSOR NOT CALIBRATED
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C006A-62-MULTI-AXIS ACCELERATION SENSOR - SIGNAL COMPARE FAILURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ignition is on and vehicle speed is above 15 km/h (9 mph).

When the Anti-lock Brake System (ABS) Module detects that one of the three Dynamics Sensor signals does not agree with the calculated value.

Note. The Dynamics Sensor is internal to the Occupant Restraint Controller (ORC).

Possible Causes
OCCUPANT RESTRAINT CONTROLLER (ORC)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

When ignition is on and vehicle speed is above 70 km/h (43 mph).

When the Anti-lock Brake System (ABS) Module detects that one of the Dynamics Sensor signals shows opposite signs from vehicle conditions.

Note. The Dynamics Sensor is internal to the Occupant Restraint Controller (ORC).

Possible Causes
OCCUPANT RESTRAINT CONTROLLER (ORC)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

During active ABS control.

If the Anti-Lock Brake System (ABS) Module detects a pressure reduction phase and the following pressure hold phase is too long.

Possible Causes
LEFT FRONT TONE WHEEL/BEARING DAMAGED
WHEEL SPEED SIGNALS SWAPPED
LEFT FRONT WHEEL SPEED SENSOR (WSS)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

During active ABS control.

If the Anti-Lock Brake System (ABS) Module detects a pressure reduction phase and the following pressure hold phase is too long.

Possible Causes
RIGHT FRONT TONE WHEEL/BEARING DAMAGED
WHEEL SPEED SIGNALS SWAPPED
RIGHT FRONT WHEEL SPEED SENSOR (WSS)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

During active ABS control.

If the Anti-Lock Brake System (ABS) Module detects a pressure reduction phase and the following pressure hold phase is too long.

Possible Causes
LEFT REAR TONE WHEEL/BEARING DAMAGED
WHEEL SPEED SIGNALS SWAPPED
LEFT REAR WHEEL SPEED SENSOR (WSS)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

During active ABS control.

If the Anti-Lock Brake System (ABS) Module detects a pressure reduction phase and the following pressure hold phase is too long.

Possible Causes
RIGHT REAR TONE WHEEL/BEARING DAMAGED
WHEEL SPEED SIGNALS SWAPPED
RIGHT REAR WHEEL SPEED SENSOR (WSS)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Continuous

The Vacuum Sensor Signal indicates that the voltage level is below 0.1 volt or greater than 3.5 volts for 100 msec.

Possible Causes
(B31) VACUUM PRESSURE SENSOR SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(B32) VACUUM PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(B32) VACUUM PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(B32) VACUUM PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(B33) VACUUM PRESSURE SENSOR RETURN CIRCUIT OPEN OR HIGH RESISTANCE
VACUUM PRESSURE SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

With the ignition on and engine running for five minutes.

When the Anti-Lock Brake Module detects that the vacuum sensor signal does not make sense based on other vehicle conditions. No signal change, signal rapid change, unexpected change.

Possible Causes
VACUUM PRESSURE SENSOR
BRAKE VACUUM BOOSTER
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition On, Continuous

The erratic vacuum pressure sensor fault is set when the ABS module detects multiple quick voltage transitions to faulted levels.

Note. If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

Possible Causes
WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
VACUUM PRESSURE SENSOR
POWER BRAKE BOOSTER
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C121A-09-STEERING ANGLE SENSOR NOT INITIALIZED - COMPONENT FAILURES

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Note. If any Electrical Power Steering (EPS) DTCs are present, perform the appropriate diagnostic procedure. Refer to DIAGNOSIS AND TESTING .

Ignition on.

When the Steering Angle Sensor (SAS) indicates that the EPS battery power was disconnected or low and the correct driving conditions have occurred.

Note. The Steering Angle Sensor (SAS) is internal to the Steering Gear.

Possible Causes
TERMINAL/CONNECTOR/WIRING HARNESS DAMAGE
STEERING ANGLE SENSOR (SAS)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

Note. The Electrical Power Steering (EPS) will erase their DTC when the low battery condition is corrected so it may not be present. Refer to DIAGNOSIS AND TESTING .

With the ignition on, engine running.

When the Powertrain Control Module (PCM) has informed the Anti-lock Brake System (ABS) Module that it can no longer allow the engine torque reduction requests when engine is above 360 rpm.

Possible Causes
EXCESSIVE LOAD ON ENGINE
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
POWERTRAIN CONTROL MODULE (PCM)

Note. If any PCM DTCs are present, perform the appropriate diagnostic procedure. Refer to the DTC INDEX article .

C123B-4B-ESP SYSTEM CONTROL TOO LONG - OVER TEMPERATURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Note. If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

With the ignition on.

When the Anti-Lock Brake System (ABS) Module indicates excessive valve control.

Possible Causes
AGGRESSIVE DRIVING MANEUVERS, MISMATCHED TIRES, FRONT END ALIGNMENT
TCS, ESP CONTROL TOO LONG OR TO FREQUENT
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Continuous.

The Vacuum Sensor five volt supply voltage feedback indicates that the voltage level is less than 4.75 volts or greater than 5.25 volts for more than 50 msec.

Possible Causes
(B31) VACUUM PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(B31) VACUUM PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
VACUUM PRESSURE SENSOR
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

If the sensed ignition voltage drops below 9 volts with engine running or vehicle speed present for 100 msec or if voltage is below 7 volts the maturation time changes to 15 ms.

Possible Causes
CHARGING SYSTEM
POWER CIRCUITS OPEN OR HIGH RESISTANCE
GROUND CIRCUITS OPEN OR HIGH RESISTANCE
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Scheme 13

Scheme 13: DIAGNOSTIC TEST
  1. VERIFY THE DTC IS ACTIVE NOTE: Diagnose and repair any Powertrain Charging system DTCs before continuing with this procedure. NOTE: Make sure the battery is fully charged. Ignition on, engine not running. With the scan tool, record and erase DTCs. Turn ignition off to the lock position. Start the engine. With the scan tool, read DTCs. Is the DTC active at this time? Yes Go To 2 No Perform the ABS-INTERMITTENT CONDITION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  2. POWER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE Turn ignition off to the lock position. Disconnect the ABS Module harness connector. Ignition on, engine not running. With a 12-volt test light connected to ground, check the (A901) Fused B+, (A902) Fused B+ and (F941) Fused Ignition Switch Output circuits at the ABS harness connector. Does the test light illuminate brightly? Yes Go To 3 No Repair the Power circuits for an open or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .
  3. GROUND CIRCUITS OPEN OR HIGH RESISTANCE Turn ignition off to the lock position. With a test light connected to B+ check the (Z924) Ground circuits at the ABS harness connector. Does the test light illuminate brightly? Yes Replace the Anti-lock Brake System (ABS) Module in accordance with the service information. Refer to «MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL»(ref-646224-S01537269742014072800000) . Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) . No Repair the Ground circuits for an open or high resistance. Perform the ABS VERIFICATION TEST. Refer to «STANDARD PROCEDURE»(ref-646228-S20797392052014072800000) .

Ignition on.

If the sensed ignition voltage is above 18V or if the ignition voltage is above 16.5V with vehicle speed greater than 6 kph (4 mph).

Possible Causes
POWERTRAIN CONTROL MODULE (PCM) CHARGING SYSTEM DTCS PRESENT
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C212A-16-SYSTEM VOLTAGE LOW - CIRCUIT VOLTAGE BELOW THRESHOLD

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuous.

The Anti-lock Brake System (ABS) Module has detected a low voltage system error and the Body Control Module (BCM) battery voltage CAN message also indicates a low voltage condition.

Possible Causes
CHARGING SYSTEM DTCS PRESENT
BATTERY
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

C212A-17-SYSTEM VOLTAGE HIGH - CIRCUIT VOLTAGE ABOVE THRESHOLD

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuous.

The Anti-lock Brake System (ABS) Module has detected a high voltage system error and the Body Control Module (BCM) battery voltage CAN message also indicates a high voltage condition.

Possible Causes
CHARGING SYSTEM DTCS PRESENT
BATTERY
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

The Anti-lock Brake System (ABS) Module has detected an internal error.

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/HYDRAULIC CONTROL UNIT DO NOT MATCH
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Ignition on.

This DTC will set if the current VIN does not match the broadcast VIN.

Possible Causes
BODY CONTROL MODULE (BCM) PROXI CONFIGURATION ALIGNMENT NOT PERFORMED
POWERTRAIN CONTROL MODULE (PCM) VIN NOT PROGRAMMED
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)
POWERTRAIN CONTROL MODULE (PCM)

Ignition on.

This DTC will set if the Body Control Module (BCM) and the Anti-lock Brake System (ABS) configuration codes do not match on power up.

Possible Causes
BODY CONTROL MODULE (BCM) PROXI CONFIGURATION ALIGNMENT NOT PERFORMED
BODY CONTROL MODULE (BCM) AND ANTI-LOCK BRAKE SYSTEM (ABS) MODULE PROXI CONFIGURATION DO NOT MATCH
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

P1DCB-72-REVERSE GEAR SWITCH - ACTUATOR STUCK OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Ignition on.

The Anti-lock Brake System (ABS) Module is receiving a signal that the reverse gear switch is indicating reverse for longer than 3 seconds while vehicle is moving forward at over 11 km/h (7 mph).

Possible Causes
POWERTRAIN CONTROL MODULE (PCM) DTCs
(T22) REVERSE SWITCH SIGNAL SHORTED TO VOLTAGE
BACKUP LAMP SWITCH
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

Ignition on, battery voltage between 9 and 16 volts.

The Anti-lock Brake Module (ABS) Module has detected catastrophic failure on the CAN bus.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
BODY CONTROL MODULE (BCM) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
BODY CONTROL MODULE (BCM)
MODULE THAT SET THIS DTC

Ignition run time is greater than one second. Battery voltage between 9 and 16 volts. Engine run time greater than three seconds.

Bus messages not received from the Powertrain Control Module (ECM/PCM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
POWERTRAIN CONTROL MODULE POWER AND GROUND
BODY CONTROL MODULE (BCM) NOT CONFIGURED CORRECTLY
POWERTRAIN CONTROL MODULE (ECM/PCM)
MODULE THAT SET THIS DTC
  1. Ignition on, battery voltage between 9 and 16 volts.

If the Anti-Lock Brakes System (ABS) Module fails to receive bus messages from the Powertrain Control Module (PCM) transmission for approximately 500 ms.

Possible Causes
DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
POWERTRAIN CONTROL MODULE (PCM) POWER AND GROUND
POWERTRAIN CONTROL MODULE (PCM) DTCs PRESENT
POWERTRAIN CONTROL MODULE (PCM)
ANTI-LOCK BRAKES SYSTEM (ABS) MODULE

Ignition on, battery voltage between 9 and 16 volts.

If the Anti-lock Brake System (ABS) Module fails to receive bus messages from the Dynamic Sensor for approximately 150 ms.

Note. The Dynamics Sensor is internal to the Occupant Restraints Controller (ORC)

Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
MODULE THAT SET THIS DTC

Ignition on, battery voltage between 9 and 16 volts.

If the Anti-lock Brake System (ABS) Module fails to receive bus messages from the Electric Power Steering (EPS) Module for approximately 150 ms.

Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
MODULE THAT SET THIS DTC

Ignition on, battery voltage between 9 and 16 volts.

Bus messages not received from the Body Control Module (BCM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
BODY CONTROL MODULE (BCM) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
BODY CONTROL MODULE (BCM)
MODULE THAT SET THIS DTC

Continuously with the ignition on, one valid CAN message received at least once, and no U0002-88-CAN C Bus Off Performance DTC present.

When the Anti-Lock Brake System (ABS) Module detects an incorrect CAN message from the Powertrain Control Module (PCM).

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE CAN BUS DTCS
ENGINE DTCS
POWERTRAIN CONTROL (PCM) CAN BUS DTCS
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
POWERTRAIN CONTROL (PCM)

Continuously with the ignition on, one valid CAN message received at least once, and no U0002-88-CAN C Bus Off Performance DTC present.

When the Anti-Lock Brake Module detects an incorrect CAN message from the Powertrain Control Module (PCM).

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE CAN BUS DTCS
POWERTRAIN CONTROL MODULE (PCM) DTCS
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
POWERTRAIN CONTROL MODULE (PCM)

Ignition in Run/Start.

Incorrect data received from Electric Power Steering Control Module (EPS).

Possible Causes
DTCS STORED OR ACTIVE IN THE EPS
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Note. Repair all other ABS or EPS DTCs before continuing with this diagnostic procedure.

Continuously with the ignition on, one valid CAN message received at least once, and no U0002-88-CAN C Bus Off Performance DTC present.

When the Anti-Lock Brake System (ABS) Module detects an incorrect CAN message from the Body Control Module (BCM).

Possible Causes
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE CAN BUS DTCS
BODY CONTROL MODULE (BCM) DTCS
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

Continuously with the ignition on, one valid CAN message received at least once.

When the Anti-Lock Brake system (ABS) Module detects an incorrect CAN message from the Dynamics Sensor.

Note. The Dynamics Sensor is internal to the Occupant Restraints Controller (ORC)

Possible Causes
OCCUPANT RESTRAINT CONTROLLER (ORC)
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTERNAL CONTROL UNIT (ICU)

U140E-00-IMPLAUSIBLE VEHICLE CONFIGURATION DATA RECEIVED

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Note. If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

Note. If the BCM has been replaced and or the PROXI Configuration Alignment has not been performed, address this issue first before continuing with this diagnostic procedure.

Continuously.

The Body Control Module (BCM) Indicates that the PROXI Configuration Alignment has not been performed.

Possible Causes
BODY CONTROL MODULE (BCM) PROXI CONFIGURATION ALIGNMENT NOT PERFORMED
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE/INTEGRATED CONTROL UNIT (ICU)

ABS INTERMITTENT CONDITION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .