Pinpoint Test M: U3003:16

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.

Refer to POWER TAILGATE/RETRACTABLE RUNNING BOARDS for schematic and connector information.

Normal Operation and Fault Conditions

The RGTM monitors its high current voltage supply circuit. If a fault is detected, the RGTM disables the power tailgate function.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RGTM U3003:16	Battery Voltage: Circuit Voltage Below Threshold	Sets when the RGTM detects the high current voltage supply circuit is less than 8.8 volts.

Possible Sources

High circuit resistance
Charging system concern
RGTM

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

M1 RECHECK THE RGTM (REAR GATE TRUNK MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, clear the DTCs.
- Wait 30 seconds.
- Using a diagnostic scan tool, carry out the RGTM self-test.
Is DTC U3003:16 still present?

Yes GO to M2

No The system is operating normally at this time. The DTC may have been set due to a previous low battery voltage condition.

M2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES

Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is any other battery or charging system related DTC set in other modules?

Yes	Diagnose the charging system concern. REFER to the appropriate Diagnosis and Testing in appropriate Battery and Charging article .

GO to M3

M3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
- Ignition OFF.
- Check the battery condition and verify the battery is fully charged. REFER to: Battery .
Is the battery OK and fully charged?

Yes GO to M4

No DIAGNOSE the battery. REFER to: Battery .

M4 CHECK THE RGTM (REAR GATE TRUNK MODULE) POWER_SUPPLY_POWER_VBATT (GATE_PWR_V) PID (PARAMETER IDENTIFICATION)
- Ignition ON.
- Measure and record the voltage at the battery.
- Using a diagnostic scan tool, monitor the RGTM Gate_Pwr_V PID.
Is the voltage within 0.2 volt of the recorded battery voltage?

Yes GO to M7

No GO to M5

M5 CHECK THE RGTM (REAR GATE TRUNK MODULE) VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

Ignition OFF.

Disconnect: RGTM C4623.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4623-13	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to M6

No	REPAIR the circuit.

M6 CHECK THE RGTM (REAR GATE TRUNK MODULE) GROUND CIRCUIT FOR HIGH RESISTANCE

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4623-13	Courtesy of FORD MOTOR COMPANY	C4623-1

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to M7

No	REPAIR the circuit.

M7 CHECK FOR CORRECT RGTM (REAR GATE TRUNK MODULE) OPERATION

Disconnect and inspect all RGTM connectors.

Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect all the RGTM connectors and make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RGTM. REFER to: Rear Gate Trunk Module (RGTM) .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.