Pinpoint Test - DTC: AJ
U3003:16 and U3003:17
Refer to Wiring Diagrams Cell 46 for schematic and connector information.
NOTE: Diagnostic Trouble Codes (DTCs) U3003:16 and U3003:17 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.
Normal Operation - RCM
The RCM continuously monitors the input voltage for correct operation. If the RCM detects input voltage below
9.0 volts while a fault is present, or below 6.0 volts, whether or not a fault is present, it stores DTC U3003:16 in memory. If the RCM detects input voltage above 16 volts while a fault is present, or above 18 volts, regardless of fault status, it stores DTC U3003:17 in memory. If the RCM sets DTC U3003:16 or U3003:17, it sends a message to the IPC to illuminate the airbag warning indicator.
Normal Operation - OCSM
The OCSM continuously monitors the input voltage for correct operation. If the OCSM detects input voltage below 8 volts, it stores DTC U3003:16 in memory. If the OCSM detects input voltage above 18 volts, it stores DTC U3003:17 in memory. If the OCSM sets DTC U3003:16 or U3003:17, it sends a fault message to the RCM. The RCM then sends a message to the IPC to illuminate the airbag warning indicator.
DTC Fault Trigger Conditions
Description | Fault Trigger Conditions |
|---|---|
U3003:16 Battery Voltage: Circuit Voltage Below Threshold | This DTC sets if the RCM detects voltage below 9 volts with certain SRS faults present or below 6 volts, whether or not a SRS fault exists. |
U3003:17 Battery Voltage: Circuit Voltage Above Threshold | This DTC sets if the RCM detects voltage above 16 volts with certain SRS faults present or above 18 volts without a SRS fault. |
U3003:16 Battery Voltage: Circuit Voltage Below Threshold | This DTC sets if the OCSM detects voltage below 8 volts. |
U3003:17 Battery Voltage: Circuit Voltage Above Threshold | This DTC sets if the OCSM detects voltage above 18 volts. |
DTC
Possible Sources
Wiring, terminals or connectors OCSM RCM
Visual Inspection and Diagnostic Pre-checks
Inspect for damaged wiring harness(es). Inspect for loose or damaged connectors.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.