Pinpoint Test H : U3003:16 Or U3003:17: Notes
Refer to Manual Climate Control System , for schematic and connector information.
Refer to Automatic Climate Control System , for schematic and connector information.
NOTE:
DTC U3003 can set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The 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 in this article.
Normal Operation and Fault Conditions
The HVAC control module is supplied constant battery voltage and ground.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | This CMDTC sets when the HVAC control module senses battery voltage is less than 8 volts for more than 10 seconds. |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | This CMDTC sets when the HVAC control module senses battery voltage is greater than 16 volts for more than 10 seconds. |
Possible Sources
- Wiring, terminals or connectors
- Charging system concern
- Battery
- HVAC control module
Visual Inspection and Diagnostic Pre-Checks
- Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
- Make sure the vehicle battery terminals are tightened to their correct torque specifications.
- Make sure BCM fuse 46 (10A) is OK.