Pinpoint Test M: DTC U3003:16
Anti-Lock Control
Pinpoint Test M: DTC U3003:16
Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information Electrical Diagrams.
Normal Operation
The operating voltage required to supply the ABS module, hydraulic pump and isolation valves is in a range between 10 and 17 volts.
- DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold)- this DTC sets if the voltage supplied to the ABS module falls below 10 volts during the ABS module self-test or normal operation, with vehicle speed greater than 5 km/h (3 mph.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Charging system concern
- ABS module
PINPOINT TEST M : DTC U3003:16
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed results in false resistance readings.
M1 RECHECK THE ABS MODULE DTCs
- Ignition ON.
- Using a scan tool, clear the ABS module DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test- ABS Module.
Is DTC U3003:16 still present?
Yes
GO to M2.
No
The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.
M2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
- Enter the following diagnostic mode on the scan tool: Self-Test- PCM KOEO (Key ON Engine OFF).
Is DTC P0620, P0622, P0626, or P065B set in the PCM?
Yes
REFER to Charging System.
No
GO to M3.
M3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Check the battery condition and verify the battery is fully charged.
Is the battery OK and fully charged?
Yes
GO to M4.
No
REFER to Battery.
M4 CHECK THE ABS MODULE VOLTAGE (VPWR) PID
- Ignition ON.
- Measure and record the voltage at the battery.
- Enter the following diagnostic mode on the scan tool: DataLogger- ABS Module.
- Monitor the ABS voltage VPWR PID.
Is the voltage within 0.2 volt of the recorded battery voltage?
Yes
GO to M7.
No
GO to M5.
M5 CHECK THE ABS MODULE VOLTAGE SUPPLY
- Ignition OFF.
- Measure and record the voltage at the battery.
- Disconnect: ABS Module C135.
- Ignition ON.
- Measure the voltage between the ABS module, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C135-1 Ground SBB05 (GY/RD) C135-8 Ground CBB92 (GN/WH) C135-32 Ground SBB43 (BU/RD)
Is each voltage within 0.2 volt of the recorded battery voltage?
Yes
GO to M6.
No
REPAIR the affected circuit(s) for high resistance. CLEAR the DTCs. REPEAT the self-test.
M6 CHECK THE ABS MODULE GROUND CIRCUIT FOR CONTINUITY
- Ignition OFF.
- Disconnect: Battery Negative Cable.
- Measure the resistance between the ABS module, C135-16, circuit GD121 (BK/YE), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to M7.
No
REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
M7 CHECK FOR CORRECT ABS MODULE OPERATION
- Ignition OFF.
- Disconnect: ABS Module C135.
- Check for:
- corrosion
- pushed-out pins
- spread terminals
- Connect: ABS Module C135.
- Make sure the connector seats correctly, then operate the system and verify the concern is still present.
Is the concern still present?
Yes
For vehicles without adaptive cruise control, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . TEST the system for normal operation.
For vehicles with adaptive cruise control, INSTALL a new HCU (Hydraulic Control Unit). REFER to Hydraulic Control Unit (HCU) .
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.