DTC P16D4-P16D6

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC P16D4 Battery Sensor Module Circuit Low Voltage DTC P16D5 Battery Sensor Module Circuit High Voltage DTC P16D6 Battery Sensor Module Current Low For symptom byte information refer to: Symptom Byte List Circuit/System Description The B110 Battery Sensor Module monitors the system voltage, current, and internal temperature to verify they are within the normal operating range. It also monitors ROM or RAM memory faults, and performs other internal diagnostics. Conditions for Running the DTC The system voltage is above 9.0 V The ignition is not OFF Conditions for Setting the DTC DTC P16D4 B110 Battery Sensor Module detects a voltage of less than 3 V. DTC P16D5 B110 Battery Sensor Module detects a voltage of greater than 26 V. DTC P16D6 B110 Battery Sensor Module detects a current of less than -1400 A. Action Taken When the DTC Sets DTC P16D4, DTC P16D5, DTC P16D6, are Type B DTCs. Stop/Start system will be disabled while the fault is current. Conditions for Clearing the DTC The conditions for setting the DTC are no longer present. A history DTC will clear after 40 consecutive ignition cycles without a fault. Diagnostic Aids A high or low voltage DTC set or voltage value in multiple modules/sensors indicates a concern in the charging system. A possible cause of this DTC could be overcharging with a battery charger or jump starting. A possible cause of this DTC is a discharged battery or a poor/intermittent connection at B110 Battery Sensor Module X1. The device is connected to the LIN bus, if there is a fault in another device on the LIN circuit 2855, it can cause the B110 Battery Sensor Module to intermittently set false DTCs. A loose battery clamp to post connection can cause Battery Sensor Module DTCs to set. The last 2 digits of the circuit number are significant in identifying its power and ground functions. – Circuits ending in 42 are primary fused B+ circuits (generally the first fuse in the circuit after the battery) – Circuits ending in 40 are secondary fused circuits (generally fuses in a fuse block after the primary circuit) – Circuits ending in 39 and 41 are ignition voltage circuits. – Circuits ending in 50 are grounds. – Circuits ending in 51 are low reference (ground) circuits. Reference Information Schematic Reference Starting and Charging Schematics Connector End View Reference Master Electrical Component List Description and Operation Charging System Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References for scan tool information Circuit/System Verification

Note

Verify Stop/Start system related campaigns or special policies have been completed prior to proceeding.

1. Ignition OFF, measure and record the battery voltage at the battery terminals.
2. Verify the battery voltage stabilizes between 12.4 and 12.8 V within a few minutes of turning the ignition OFF. ⇒ If battery voltage is less than 12.4 V or more than 12.8 V Refer to Battery Inspection/Test. ⇓ If battery voltage is between 12.4 and 12.8 V
3. Engine running, headlights ON, measure and record the battery voltage at the battery terminals.
4. Verify the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V. ⇒ If the voltage is not at least 1 V greater than the voltage measured in step 1 or is greater than 15 V. Refer to Charging System Test. ⇓ If the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V.
5. Inspect the wiring circuits to the B110 Battery Sensor Module for proper routing and/or damage. ⇒ If a condition is found Repair the condition. ⇓ If no condition is found
6. Verify no current or history DTCs are set for devices on LIN circuit 2855. ⇒ If any DTCs are set Refer to Diagnostic Trouble Code (DTC) List - Vehicle. ⇓ If no DTCs are set
7. Refer to Circuit/System Testing. Circuit/System Testing

Note

Circuit/System Verification MUST be performed prior to performing Circuit/System Testing. Some control module ground circuits may require up to 20 min after the ignition is turned off before achieving a resistance reading of less than 5 Ω. In most cases the readings will drop below 20 Ω within 1 min indicating the control module is going to sleep.

1. Ignition OFF and all vehicle systems OFF.
2. Test for less than 2 Ω between the C1 Battery negative post and battery clamp. ⇒ If 2 Ω or greater Repair the high resistance in the connection. ⇓ If less than 2 Ω
3. Disconnect the C1 Battery.
4. Test for less than 2 Ω between the B110 Battery Sensor Module clamp and B110 Battery Sensor Module ground circuit terminal A X2. ⇒ If 2 Ω or greater Replace B110 Battery Sensor Module. ⇓ If less than 2 Ω
5. Connect the C1 Battery.
6. Disconnect the X1 connector at the B110 Battery Sensor Module.
7. Verify a test lamp illuminates between B+ circuit terminal 2 X1 and ground. ⇒ If the test lamp does not illuminate and the circuit fuse is good 7.1. Test the circuit 2340 for an open/high resistance. ⇒ If an open/high resistance is found, repair the fault on the circuit. ⇓ If an open or high resistance is not found 7.2. Verify the fuse is not open and there is voltage at the fuse. ⇒ If the test lamp does not illuminate and the circuit fuse is open 7.1. Test the circuit 2340 for a short to ground ⇒ If a short to ground is found, repair the fault on the circuit. ⇓ If a short to ground is not found 7.2. Replace the B110 Battery Sensor Module. ⇓ If the test lamp illuminates
8. Replace the B110 Battery Sensor Module. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Battery Monitor Module Replacement for B110 Battery Sensor Module replacement