PINPOINT TEST G : DTCs U3003:16 OR 17: Notes
WARNING: This page is about a different car, the 2015 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Automatic Climate Control System , for schematic and connector information.
NOTE:
DTC U3003 can be 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 .
Normal Operation and Fault Conditions
The HVAC 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 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 module senses battery voltage is greater than 16 volts for more than 10 seconds. |
Possible Sources
- Wiring, terminals or connectors
- HVAC module
Visual Inspection and Diagnostic Pre-checks
- Inspect loose or corroded HVAC module connections.