Pinpoint Test Q: DTC P0ADD:00
High-Voltage Traction Battery
Pinpoint Test Q: DTC P0ADD:00
Refer to Wiring Diagram Set 12, Charging System for schematic and connector information. [1][2]Diagrams By Number
Normal Operation
When the ignition is turned on, the Battery Energy Control Module (BECM) makes various vehicle checks. If these checks are normal, the BECM (Battery Energy Control Module) sends a signal to the contactor to close which will supply power to the high-voltage vehicle systems. The Battery Pack Sensor Module (BPSM) monitors the battery voltage from inside the High Voltage Traction Battery (HVTB) and compares it to voltage on the high-voltage Bussed Electrical Center (BEC) contactors. If there is no high voltage to the negative contactor, the BECM (Battery Energy Control Module) will set the DTC and shut down the vehicle. The stop safely hazard (red triangle) warning indicator will illuminate and the vehicle will shut down.
- P0ADD:00 (Hybrid Battery Negative Contactor Control Circuit Open: No Sub Type Information)- If there is no high voltage to the negative contactor, this DTC will be set.
This pinpoint test is intended to diagnose the following:
- BECM (Battery Energy Control Module)
- High-voltage BEC (Bussed Electrical Center)
- HVTB (High Voltage Traction Battery)
PINPOINT TEST Q : DTC P0ADD:00
WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Q1 MEASURE CONTACTOR RESISTANCE
WARNING: Never install the service disconnect plug with the high-voltage bussed electrical center (BEC) cover removed. Always install the cover prior to connecting the service disconnect plug. The high-voltage BEC cover prevents inadvertent contact with the high voltage which is present at several points under the cover. Failure to follow these instructions may result in serious personal injury or death.
- Ignition OFF.
- Depower the HVTB (High Voltage Traction Battery) system. Refer to High-Voltage Traction Battery Systems Depowering .
- Remove the high-voltage BEC (Bussed Electrical Center) cover. Refer to the exploded view in Battery Pack Sensor Module (BPSM) .
- Disconnect: High-voltage BEC (Bussed Electrical Center) C4236D.
- Measure the resistance between high-voltage BEC (Bussed Electrical Center) C4236D pin 7 and pin 8, component side.
Is the resistance between 5-50 ohms?
Yes
GO to Q2.
No
INSTALL a new high-voltage BEC (Bussed Electrical Center). REFER to High-Voltage Bussed Electrical Center . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
Q2 MEASURE CIRCUIT RESISTANCE
- Disconnect: BECM (Battery Energy Control Module) C4237B.
- Measure the resistance between:
- high-voltage BEC (Bussed Electrical Center) C4236D-7, circuit J1-A55, harness side and BECM (Battery Energy Control Module) C4237B-55, circuit J1-A55, harness side.
- high-voltage BEC (Bussed Electrical Center) C4236D-8, circuit J1-A56, harness side and BECM (Battery Energy Control Module) C4237B-56, circuit J1-A56, harness side.
Are the resistances less than 5 ohms?
Yes
GO to Q3.
No
INSTALL a new HVTB (High Voltage Traction Battery) (includes HVTB (High Voltage Traction Battery) system wire harness). REFER to High-Voltage Traction Battery . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
Q3 CHECK FOR CORRECT BECM (Battery Energy Control Module) OPERATION
- Ignition OFF.
- Check the BECM (Battery Energy Control Module) harness and component side connectors for:
- corrosion.
- pushed-out/bent pins.
- Connect the BECM (Battery Energy Control Module) and make sure the connectors seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new BECM (Battery Energy Control Module). REFER to Battery Energy Control Module (BECM) . CLEAR the DTCs. REPEAT the self-test. 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. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.