Pinpoint Test L: DTCs U3003:16, U3003:17
Anti-Lock Control
Pinpoint Test L: DTCs U3003:16, U3003:17
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 16 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.
- DTC U3003:17 (Battery Voltage: Circuit Voltage Above Threshold)- this DTC sets if the voltage supplied to the ABS module is greater than 17 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:
- Module configuration (ABS and PCM)
- ABS module
PINPOINT TEST L : DTCs U3003:16 AND U3003:17
NOTE: DTCs U3003:16 and U3003:17 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.
L1 RETRIEVE ALL CMDTCs (Continuous Memory Diagnostic Trouble Codes) IN ALL MODULES
- Connect: ABS Module C135.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- CMDTCs (Continuous Memory Diagnostic Trouble Codes).
Are there battery, voltage or charging system DTCs present in more than one module?
Yes
REFER to Charging System for diagnosis of the battery and charging system.
No
For ABS DTC U3003:16 GO to L2. For ABS DTC U3003:17 GO to L6
L2 CHECK BATTERY CONDITION
- Ignition OFF.
- Refer to Charging System 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 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 L3.
No
INSTALL a new battery. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the system for normal operation.
L3 CHECK THE ABS MODULE GROUND EYELET
- Ignition OFF.
- Remove the bolt retaining G107/G108 at the inner RF fender.
- Clean the chassis mating surface and ground eyelets.
- Install the ground eyelet to the chassis with the retaining bolt.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- ABS Module.
Is the concern still present?
Yes
GO to L4.
No
The concern was caused by a loose or corroded connector. CLEAR the DTCs. REPEAT self-test.
L4 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN
NOTE: Failure to disconnect the battery when instructed results in false resistance readings.
- Ignition OFF.
- Disconnect: Battery Cable- Negative.
- Disconnect: ABS Module C135.
- Measure the resistance between ground and:
- ABS module C135-47, circuit GD123 (BK/GY), harness side.
- Repeat this measurement while wiggling the harness.
Is the resistance less than 5 ohms?
Yes
GO to L5.
No
The concern was caused by a loose or corroded connector. CLEAR the DTCs. REPEAT self-test.
L5 CHECK FOR VOLTAGE AT THE ABS MODULE
- Connect: Battery Cable- Negative.
- Ignition ON.
- Measure the voltage between ground and:
- ABS module C135-1, circuit SBB01 (RD), harness side.
- ABS module C135-8, circuit CBP22 (GN/OG), harness side.
- ABS module C135-32, circuit SBB09 (RD), harness side.
Are the voltages greater than 10 volts?
Yes
GO to L6.
No
VERIFY that BJB (Battery Junction Box) fuses 1 (40A), and 9 (20A) and CJB (Central Junction Box) 22 (7.5A) 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 Electrical Diagrams.
CLEAR the DTCs and REPEAT the self-test.
L6 CHECK CHARGING SYSTEM VOLTAGE
- Start the engine.
- 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 L7.
No
REFER to Charging System to diagnose the charging system. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes).
TEST the system for normal operation.
L7 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 Hydraulic Control Unit (HCU) 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.