Pinpoint Test BD: U3003:16 And U3003:17

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

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.

Refer to Wiring Diagrams SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Airbag and Seatbelt Pretensioner Supplemental Restraint System (SRS) - System Operation and Component Description .

RCM

The RCM continuously monitors the input voltage for correct operation. If the RCM detects a fault it sets DTC U3003:16 or U3003:17 and sends a message to the IPC to illuminate the airbag warning indicator.

OCSM

The OCSM continuously monitors the input voltage for correct operation. If the OCSM detects a fault, it sets DTC U3003:16 or U3003:17 and 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

DTC	Description	Fault Trigger Condition
RCM U3003:16	Battery Voltage: Circuit Voltage Below Threshold	This DTC sets if the RCM detects voltage below 9 volts with a SRS fault or below 6 volts, whether or not a SRS fault exists.
RCM U3003:17	Battery Voltage: Circuit Voltage Above Threshold	This DTC sets if the RCM detects voltage above 16 volts with a SRS fault or above 18 volts without a SRS fault.
OCSM U3003:16	Battery Voltage: Circuit Voltage Below Threshold	This DTC sets if the OCSM detects voltage below 7.2 volts and another OCSM fault exists.
OCSM U3003:17	Battery Voltage: Circuit Voltage Above Threshold	This DTC sets if the OCSM detects voltage above 17.8 volts and another OCSM fault exists or above 18 volts without another OCSM fault.

Possible Sources

Charging system concern
OCSM
Wiring, terminals or connectors
RCM

Visual Inspection and Pre-checks

Inspect for damaged wiring harness(es).
Inspect for loose or damaged connectors.

WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
WARNING: Do not handle, move or change the original horizontal mounting position of the Restraints Control Module (RCM) while the Restraints Control Module (RCM) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy® and cause serious personal injury or death.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE: Install new components only when directed to do so in the pinpoint test.
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

BD1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS) IN ALL MODULES

WARNING: Before beginning any service procedure In this article, refer to Safety warnings in General Information. Failure to follow this instruction may result in serious personal injury.
- REFER to: Pyrotechnic Device Health and Safety Precautions .
- Ignition ON.
- Using a diagnostic scan tool, retrieve ALL Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM?

Yes DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure.

No GO to BD2

BD2 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Review the Diagnostic Trouble Codes (DTCs) recorded in the previous step.
Were any BCM Diagnostic Trouble Codes (DTCs) retrieved and recorded?

Yes DIAGNOSE the BCM Diagnostic Trouble Codes (DTCs). REFER to the BCMDTC Chart In this article.

No GO to BD3

BD3 TEST BATTERY CONDITION

Ignition OFF.

Carry out the Battery Condition Test. REFER to: Battery .

Did the battery pass the condition test?

Yes

If the battery passed the condition test but required a recharge, DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). If the battery passed the condition test and did not require a recharge, GO to BD4

No	INSTALL a new battery. REFER to: Battery . CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

BD4 CHECK THE CHARGING SYSTEM VOLTAGE

Start the engine.

For DTC U3003:17, turn off all accessories while measuring the battery voltage.

For DTC U3003:16, turn on headlights and HVAC fan on high while measuring the battery voltage.

With the engine still running at idle, measure and record:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is the voltage between 13 and 15.2 volts?

Yes	For DTC U3003:16, GO to BD5 For DTC U3003:17, GO to BD7

No	DIAGNOSE the charging system. Refer to the appropriate Battery and Charging System article for the procedure. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

BD5 CHECK FOR HIGH RESISTANCE IN THE IGNITION CIRCUIT TO THE MODULE

Ignition OFF.

Depower the SRS. Refer to REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect BCM C2280B and C2280E.

Disconnect the module with the concern:
- For the RCM, disconnect C310A and C310B
- For the OCSM, disconnect C3285.

For the RCM, measure:

Positive Lead	Measurement / Action	Negative Lead
C310A-19	Courtesy of FORD MOTOR COMPANY	C2280B-42

For the OCSM, measure:

Positive Lead	Measurement / Action	Negative Lead
C3285-1	Courtesy of FORD MOTOR COMPANY	C2280E-6

Is the resistance less than 1 ohm?

Yes

GO to BD6

No	REPAIR the circuit as necessary. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

BD6 CHECK FOR HIGH MODULE GROUND RESISTANCE

For the RCM, measure:

Positive Lead	Measurement / Action	Negative Lead
RCM mounting bracket	Courtesy of FORD MOTOR COMPANY	Ground

For the OCSM, measure:

Positive Lead	Measurement / Action	Negative Lead
C3285-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 1 ohm?

Yes

GO to BD7

For the RCM, VERIFY there is no corrosion between the RCM and the mounting surface. VERIFY the fasteners are clean and tightened to specification with no corrosion. REPAIR as necessary. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. For the OCSM, REPAIR the circuit. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

BD7 CHECK FOR MODULE OPERATION

Ignition OFF.

If not previously directed to do so, depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect the module with the concern:
- For the RCM, disconnect C310A and C310B (if not previously disconnected).
- For the OCSM, disconnect OCSM C3285 (if not previously disconnected).

Check for the following:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect the module with the concern:
- For the RCM, connect C310A and C310B Make sure the connector seats correctly and engages the Connector Position Assurance (CPA) lever/lock.
- For the OCSM, connect C3285. Make sure the connector seats correctly.

Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, clear all RCM and OCSM Diagnostic Trouble Codes (DTCs).

NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM and OCSM.

Using a diagnostic scan tool, perform

Restraints self-test.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSBs) address this concern, and DTC U3003:16 or U3003:17 was present in the RCM, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) . If no Technical Service Bulletins (TSBs) address this concern, and DTC U3003:16 or U3003:17 was present in the OCSM, INSTALL a new OCSM. REFER to: Occupant Classification System (OCS) Sensor - Vehicles With: Multi-Contour Seats . or REFER to: Occupant Classification System (OCS) Sensor - Vehicles Without: Multi-Contour Seats .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.