Pinpoint Test K: DTC U3003:62

Remote Function Actuator (RFA) Module

Pinpoint Test K: DTC U3003:62

Normal Operation

- DTC U3003:62 (Battery Voltage: Signal Compare Failure)- sets when the RFA (Remote Function Actuator) module detects voltage has dropped below 9 volts or rises above 15 volts from either of the voltage supply circuits.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- High circuit resistance

- Charging system concern

- RFA (Remote Function Actuator) module

PINPOINT TEST K : DTC U3003:62

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

NOTE: Failure to disconnect the battery when instructed results in false resistance readings.

NOTE: DTC U3003:62 may be stored in the module memory due to previous battery charging or vehicle jump starting events.

K1 RECHECK THE RFA (Remote Function Actuator) MODULE DTCs

- Ignition OFF.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: RFA (Remote Function Actuator) Module Self-Test.

- Clear the DTCs. Repeat the RFA (Remote Function Actuator) module self-test.

Is DTC U3003:62 still present?

Yes
GO to K2.

No
The system is operating normally at this time. The DTC may have been set due to a previous low battery voltage condition, during battery charging or while jump starting the vehicle.

K2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM

- Enter the following diagnostic mode on the scan tool: PCM Self-Test.

- Carry out the PCM KOEO (Key ON Engine OFF) self-test.

- Retrieve the continuous memory DTCs from the PCM.

Is DTC P0562, P0620, P0622, P0625, P0626 or P065B set in the PCM?

Yes
REFER to Charging System.

No
GO to K3.

K3 CHECK FOR DTCs B1317, B1318 B1676, P0563, U3003:16 OR U3003:17 SET IN OTHER MODULES

- Enter the following diagnostic mode on the scan tool: Self-Test.

- Retrieve the continuous memory DTCs from all modules.

Is DTC B1317, B1318, B1676, P0563 (PCM), U3003:16 or U3003:17 set in any other module?

Yes
REFER to Charging System to diagnose the charging system condition.

No
GO to K4.

K4 CHECK THE BATTERY VOLTAGE

- Turn off all interior/exterior lights and accessories.

- Start and run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to 15 volts or higher?

Yes
REFER to Charging System to diagnose an overcharging condition.

No
GO to K5.

K5 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

- Ignition OFF.

- Check the battery condition and verify the battery is fully charged.

Is the battery OK and fully charged?

Yes
GO to K6.

No
REFER to Charging System.

K6 CHECK THE RFA (Remote Function Actuator) MODULE VOLTAGE PID

- Ignition ON.

- Measure and record the voltage at the battery.

- Enter the following diagnostic mode on the scan tool: RFA (Remote Function Actuator) Module DataLogger.

- Monitor the RFA (Remote Function Actuator) module voltage PID (ECU_Pwr_Sup).

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

Yes
GO to K9.

No
GO to K7.

K7 CHECK THE RFA (Remote Function Actuator) MODULE VOLTAGE SUPPLY

- Ignition OFF.

- Disconnect: RFA (Remote Function Actuator) Module C2153C.

- Ignition ON.

- Measure the voltage between the RFA (Remote Function Actuator) module C2153C-1, circuit SBP23 (WH/RD), harness side and ground; and between the RFA (Remote Function Actuator) module C2153C-5, circuit SBP27 (BU/RD), harness side and ground.






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

Yes
GO to K8.

No
REPAIR circuit SBP23 (WH/RD) or circuit SBP27 (BU/RD) for high resistance as necessary. CLEAR the DTC. REPEAT the self-test.

K8 CHECK THE RFA (Remote Function Actuator) MODULE GROUND CIRCUIT FOR HIGH RESISTANCE

- Ignition OFF.

- Disconnect: Negative Battery Cable.

- Measure the resistance between the RFA (Remote Function Actuator) module C2153C-3, circuit GD115 (BK/GY), harness side and ground.






Is the resistance less than 5 ohms?

Yes
GO to K9.

No
REPAIR circuit GD115 (BK/GY) for high resistance. CLEAR the DTC. REPEAT the self-test.

K9 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION

- Disconnect the RFA (Remote Function Actuator) module connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the RFA (Remote Function Actuator) module connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new RFA (Remote Function Actuator) module. REFER to Remote Function Actuator (RFA) Module. TEST the system for normal operation.

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