Pinpoint Test O: DTCs U3003:16 and 17
Anti-Lock Control - Hybrid
Pinpoint Test O: DTCs U3003:16 and 17
Refer to Wiring Diagram Set 42 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Vehicle Dynamic Systems for schematic and connector information. Diagrams By Number
Normal Operation
The voltage required for correct ABS operation is between 10 and 17.8 volts. Fused battery voltage is supplied to the ABS module from the Battery Junction Box (BJB), BJB). Fused ignition voltage is supplied to the ABS module from the BJB.
- DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold) - If the voltage is below 10 volts, this DTC sets.
- DTC U3003:17 (Battery Voltage: Circuit Voltage Above Threshold) - If the voltage is above 17 volts, this DTC sets.
This pinpoint test is intended to diagnose the following:
- Fuses
- Wiring, terminals or connectors
- ABS module
PINPOINT TEST O: DTCs U3003:16 AND 17
NOTE: DTCs U3003:16 and 17 can set if the vehicle has been recently jump started, the 12-volt battery has been recently charged or the 12-volt battery has been discharged. The 12-volt battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
NOTE: Carry out a thorough inspection and verification before proceeding with the pinpoint test. Refer to Inspection and Verification. Inspection and Verification
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O1 VERIFY ALL WIRING CONNECTIONS
- Disconnect: ABS Module C135 .
- Using a good light source, inspect each connector terminal for any corrosion.
- Inspect both connectors for any pushed-out pins.
Refer to Wiring Diagram Set 5 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid) for schematic and connector information. Diagrams By Number
- Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
- C135-1
- C135-8
- C135-16
- C135-32
- C135-47
- Refer to Wiring Diagram Set 5 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid) for schematic and connector information. Diagrams By Number
- Is each terminal free of corrosion, pushed-out pins or spread terminals?
Yes
GO to O2.
No
REPAIR the affected terminal(s). CLEAR the DTCs. REPEAT the self-test.
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O2 RETRIEVE ALL CMDTCs IN ALL MODULES
- Connect: ABS Module C135 .
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - All CMDTCs .
- Is DTC U3003:16 or 17, DTCs B1317, B1318 and/or B1676 present in one or more modules AND DTC P0563, P0620, P0625, P0626 or P065B present in the PCM?
Yes
REFER to High Voltage Converter/Inverter Testing and Inspection for diagnosis of the battery and charging system.
No
GO to O3.
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O3 CHECK BATTERY CONDITION
- Ignition OFF.
- Refer to Battery, Mounting and Cables Testing and Inspection and carry out the Battery - Condition Test. Pinpoint Tests
- Does the battery pass the condition test?
Yes
If the battery passed the condition test but required a recharge, REFER to Charging System Testing and Inspection to diagnose the charging system. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). TEST the system for normal operation.
If the battery passed the condition test and did not require a recharge, GO to O4.
No
INSTALL a new battery. CLEAR all CMDTCs. TEST the system for normal operation.
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O4 CHECK CHARGING SYSTEM VOLTAGE
- Start the vehicle, verify that the ready indicator is illuminated.
- Measure the voltage of the battery with and without a load on the charging system as follows:
- Turn off all accessories and measure battery voltage.
- Turn on headlights and HVAC fan on high and measure battery voltage.
- Are the voltages between 13 and 15.2 volts?
Yes
GO to O5.
No
REFER to High Voltage Converter/Inverter Testing and Inspection to diagnose the charging system. CLEAR all CMDTCs. TEST the system for normal operation.
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O5 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: ABS Module C135 .
- Measure the resistance between ground and:
- ABS module C135-16, circuit GD121 (BK/YE), harness side.
- ABS module C135-47, circuit GD121 (BK/YE), harness side.
- Repeat this measurement while wiggling the harness.
- Is the resistance less than 5 ohms?
Yes
GO to O6.
No
REPAIR circuit GD121 (BK/YE). CLEAR all CMDTCs. REPEAT the self-test.
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O6 CHECK FOR VOLTAGE AT THE ABS MODULE
- Ignition ON.
- Measure the voltage between ground and:
- ABS module C135-1, SBB08 (VT/RD), harness side.
- ABS module C135-8, CBK03 (GY), harness side.
- ABS module C135-32, SBB10 (YE/RD), harness side.
- Are the voltages greater than 10 volts?
Yes
GO to O7.
No
VERIFY that BJB fuses 8 (50A), 10 (30A) and 47 (10A) are OK. If OK, REPAIR the affected circuit(s).
If the fuses are not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number
CLEAR the DTCs and REPEAT the self-test.
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O7 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
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module - Hybrid Service and Repair. TEST the system for normal operation.
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.
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