Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test M: U3003:17
- Normal Operation and Fault Conditions
The PACM monitors battery voltage and sets a DTC when operating voltage is high.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PACM U3003:17 Battery Voltage: Circuit Voltage Above Threshold Sets in the PACM in continuous memory if the PACM detects battery voltage above 16 volts on the voltage supply circuit for 50 milliseconds or longer. Possible Sources
- Charging system concern
- PACM
- NOTE: DTC U3003:17 may be stored in the module memory due to past battery charging or vehicle jump starting events.
- M1 CHECK FOR OVERCHARGING DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
- Ignition ON.
- Using a diagnostic scan tool, perform self-test on all modules.
- Retrieve the continuous memory DTCs from all modules.
Are any high voltage Diagnostic Trouble Codes (DTCs) set in more than one module?
Yes DIAGNOSE the overcharging condition. REFER to: Battery . No GO to M2 - M2 CHECK THE BATTERY VOLTAGE
- Turn off all interior/exterior lights and accessories.
- Start and run the engine at approximately 2, 000 rpm for 3 minutes while monitoring the battery voltage.
Does the battery voltage rise to 15.5 volts or higher?
Yes DIAGNOSE the overcharging condition. REFER to: Battery . No GO to M3 - M3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, clear the continuous memory DTCs.
- Carry out the IPC self-test.
Is DTC U3003:17 present?
Yes INSTALL a new PACM. REFER to: Pedestrian Alert Control Module (PACM) . No The system is operating correctly at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.