U1007
Pinpoint Test
Pinpoint Test H: DTC U1007:31
Refer to Wiring Diagram Set 13, Power Distribution/BCM for schematic and connector information Electrical Diagrams.
Normal Operation
The battery current sensor is a Hall-effect sensor attached to the battery ground cable. It is supplied a 5 volt reference and ground from the Body Control Module (BCM). The BCM (Body Control Module) reads the battery current sensor feedback voltage to determine how much current is flowing through the battery ground cable.
- DTC U1007:31 (Lost Communication With Battery Monitoring Sensor "A": No Signal)- The BCM (Body Control Module) does not indicate current from the battery current sensor.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Battery current sensor
- BCM (Body Control Module)
PINPOINT TEST H : DTC U1007:31
H1 CHECK THE BATTERY CURRENT SENSOR
- Inspect the battery current sensor for the following:
- Physical damage
- Corrosion
- Disconnected electrical connector
- Disconnected from battery ground cable
- Debris between the battery current sensor and the battery ground cable
Are any of these conditions found during inspection?
Yes
REPAIR as necessary or INSTALL a new battery current sensor.
No
GO to H2.
H2 CHECK THE BCM (Body Control Module) OUTPUT VOLTAGE
- Ignition OFF.
- Disconnect: Battery Current Sensor C1646.
- Ignition ON.
- Measure the voltage between ground and battery current sensor C1646-1, circuit SDC57 (BU/OG), harness side.
Is the voltage between 4.7 and 5.1 volts?
Yes
GO to H5.
No
If the voltage is less than 4.7 volts, GO to H3.
If the voltage is greater than 5.1 volts REPAIR circuit SDC57 (BU/OG) for a short to voltage.
H3 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Body Control Module (BCM) C2280F.
- Measure the resistance between ground and battery current sensor C1646-1, circuit SDC57 (BU/OG), harness side.
Is the resistance greater than 10,000 ohms?
Yes
GO to H4.
No
REPAIR circuit SDC57 (BU/OG) for a short to ground.
H4 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR AN OPEN
- Measure the resistance between battery current sensor C1646-1, circuit SDC57 (BU/OG), harness side and BCM (Body Control Module) C2280F-20, circuit SDC57 (BU/OG), harness side.
Is the resistance less than 5 ohms?
Yes
GO to H12.
No
REPAIR circuit SDC57 (BU/OG) for an open or high resistance.
H5 CHECK THE BCM (Body Control Module) SENSOR GROUND
- Measure the voltage between battery current sensor C1646-2, circuit RDC59 (GY/BN), harness side and battery current sensor C1646-1, circuit SDC57 (BU/OG), harness side.
Is the voltage greater than 4.7 volts?
Yes
GO to H8.
No
GO to H6.
H6 CHECK THE SIGNAL RETURN CIRCUIT FOR VOLTAGE
- Measure the voltage between ground and battery current sensor C1646-2, circuit RDC59 (GY/BN), harness side.
Is any voltage present?
Yes
If the voltage is 5.1 volts or less, REPAIR circuit RDC59 (GY/BN) for a short to circuit SDC57 (BU/OG).
If the voltage is greater than 5.1 volts REPAIR circuit RDC59 (GY/BN) for a short to voltage.
No
GO to H7.
H7 CHECK THE SIGNAL RETURN CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: BCM (Body Control Module) C2280F.
- Measure the resistance between battery current sensor C1646-2, circuit RDC59 (GY/BN), harness side and BCM (Body Control Module) C2280F-14, circuit RDC59 (GY/BN), harness side.
Is the resistance less than 5 ohms?
Yes
GO to H12.
No
REPAIR circuit RDC59 (GY/BN) for an open or high resistance.
H8 CHECK THE FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE
- Measure the voltage between ground and battery current sensor C1646-3, circuit LDC59 (BU/WH), harness side.
Is any voltage present?
Yes
REPAIR circuit LDC59 (BU/WH) for a short to voltage.
No
GO to H9.
H9 CHECK THE FEEDBACK CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between ground and battery current sensor C1646-3, circuit LDC59 (BU/WH), harness side.
Is the resistance greater than 10,000 ohms?
Yes
GO to H10.
No
REPAIR circuit LDC59 (BU/WH) for a short to ground.
H10 CHECK THE FEEDBACK CIRCUIT FOR AN OPEN
- Disconnect: BCM (Body Control Module) C2280F.
- Measure the resistance between battery current sensor C1646-3, circuit LDC59 (BU/WH), harness side and BCM (Body Control Module) C2280F-21, circuit LDC59 (BU/WH), harness side.
Is the resistance less than 5 ohms?
Yes
GO to H11.
No
REPAIR circuit LDC59 (BU/WH) for an open.
H11 CHECK THE FEEDBACK CIRCUIT FOR A SHORT TO THE SIGNAL RETURN OR REFERENCE CIRCUIT
- Measure the resistance between battery current sensor C1646-3, circuit LDC59 (BU/WH), harness side and:
- battery current sensor C1646-2, circuit RDC59 (GY/BN), harness side.
- battery current sensor C1646-1, circuit SDC57 (BU/OG), harness side.
Is the resistance greater than 10,000 ohms?
Yes
INSTALL a new battery current sensor. CLEAR the DTCs. REPEAT the self-test. If the DTC returns, GO to H12.
No
REPAIR circuit LDC59 (BU/WH) for a short to circuit RDC59 (GY/BN) or SDC57 (BU/OG).
H12 CHECK THE BCM (Body Control Module) CONNECTION
- Disconnect all the BCM (Body Control Module) connectors.
- Inspect the BCM (Body Control Module) connectors for:
- corrosion
- pushed-out terminals
- damaged terminals
- Connect and correctly seat all the BCM (Body Control Module) connectors.
- Clear the DTCs.
- Repeat the self-test.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new BCM (Body Control Module).
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.