Pinpoint Test Y: Abs Module Internal Fault Concern

Normal Operation and Fault Conditions

The ABS module carries out self tests during operation, the module also monitors various inputs and compares the values to what is expected. If the values received are out of range, are not what is expected, or if any of the self tests fail, the ABS module sets a DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS C1B11:71	Pressure Control Valve: Actuator Stuck	Sets when the ABS module detects an unwanted opening or closing of the pressure control valve. This is most likely due to an internal failure of the EBB.
ABS P062F:46	Internal Control Module EEPROM Error: Calibration/Parameter Memory Failure	This DTC sets when a value is written by the ABS module is written to EEPROM but the value read back is not correct.
ABS U3000:00	Control Module: No Sub Type Information	Sets when the ABS module detects an internal hardware fault.
ABS U3000:44	Control Module: Data Memory Failure	Sets when the ABS module detects an internal hardware fault.
ABS U3000:45	Control Module: Program Memory Failure	Sets when the ABS module detects an internal hardware fault.
ABS U3000:46	Control Module: Calibration/Parameter Memory Failure	Sets when the ABS module detects an internal hardware fault.
ABS U3000:49	Control Module: Internal Electronic Failure	Sets when the ABS module detects an internal hardware fault.
ABS U3000:4B	Control Module: Over Temperature	Sets when the ABS module detects an internal hardware fault.
ABS U3000:96	Control Module: Component Internal Failure	Sets when the ABS module detects an internal hardware fault.

Possible Causes

HS-CAN concern
Incorrect sensor input
Stuck valve
EBB unit (HCU and ABS module assembly)

Y1 GUIDED DIAGNOSTIC QUESTION
- This step is for vehicles equipped with an EPB system or an EBB unit.
Were you sent here from diagnostics?

Yes GO to Y3

No GO to Y2

Y2 RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE FOR DTC (DIAGNOSTIC TROUBLE CODE) S

Ignition ON.

Clear the ABS DTCs.

Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.

NOTE: If DTC U3000:4B is present, allow the vehicle to cool for a minimum of 30 minutes.

Ignition ON.

Using a diagnostic scan tool, carry out the ABS self-test.

RECORD the ABS module DTCs.

Are any of the DTCs from the Fault Trigger Conditions table present and active in the ABS module?

Yes

GO to Y3

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

Y3 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.

Disconnect ABS Module connector C135.

Using a good light source, INSPECT the electrical connector for the following:
- Corrosion - INSTALL new connector or terminal and clean the module pins
- Damaged or bent pins - INSTALL new terminals or pins
- Pushed-out pins - INSTALL new pins as necessary
- Spread terminals - INSTALL new terminals as necessary

Connect ABS module connector C135. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new EBB module. REFER to: Electric Brake Booster (EBB) .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.