Pinpoint Test AY: DTC U3003:16

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AY: DTC U3003:16

Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information [1][2]Diagrams By Number.

Normal Operation

- DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold)- sets in the Instrument Panel Cluster (IPC) in continuous memory if the IPC (Instrument Panel Cluster) detects battery voltage below 9 volts.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- High circuit resistance

- IPC (Instrument Panel Cluster)

PINPOINT TEST AY : DTC U3003:16

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.

AY1 RECHECK THE IPC (Instrument Panel Cluster) DTCs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) Self-Test.

- Clear the DTCs. Repeat the IPC (Instrument Panel Cluster) self-test.

Is DTC U3003:16 still present?

Yes
GO to AY2.

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

AY2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM

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

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

- Retrieve the continuous memory DTCs from all modules.

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

Yes
REFER to Charging System.

No
GO to AY3.

AY3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

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

Is the battery OK and fully charged?

Yes
GO to AY4.

No
REFER to Battery.

AY4 CHECK THE IPC (Instrument Panel Cluster) VOLTAGE INPUT

- Measure and record the voltage at the battery.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) voltage input PID (MODULE_VOLT). Monitor the voltage PID and compare the reading with the recorded battery voltage.

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

Yes
GO to AY6.

No
GO to AY5

AY5 CHECK THE IPC (Instrument Panel Cluster) VOLTAGE SUPPLY

- Ignition OFF.

- Disconnect: IPC (Instrument Panel Cluster) C220.

- Ignition ON.

- Measure the voltage between the IPC (Instrument Panel Cluster) C220-1, circuit SBP26 (YE/RD), harness side and ground.





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

Yes
GO to AY6.

No
REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.

AY6 CHECK THE IPC (Instrument Panel Cluster) GROUND CIRCUIT

- Ignition OFF.

- Disconnect: Negative Battery Cable.

- Measure the resistance between the IPC (Instrument Panel Cluster) C220-8, circuit GD116 (BK/VT), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to AY7.

No
REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.

AY7 CHECK FOR CORRECT IPC (Instrument Panel Cluster) OPERATION

- Disconnect the IPC (Instrument Panel Cluster) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the IPC (Instrument Panel Cluster) connector and make sure it seats correctly.

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

Is the concern still present?

Yes
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . 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.