P0ABF

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0ABF-123: Hybrid Battery Pack Current Sensor Circuit

DTC P0ABF-123 - Hybrid Battery Pack Current Sensor Circuit

DTC P0AC1-123 - Hybrid Battery Pack Current Sensor Circuit Low

DTC P0AC2-123 - Hybrid Battery Pack Current Sensor Circuit High

DESCRIPTION
- The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amperage that flows to and from the HV battery. The battery smart unit receives a voltage of between 0 and 5 V that is in proportion to the amperage flowing in the cable. This voltage goes into the IB terminal from the battery current sensor. A battery current sensor output voltage below 2.5 V indicates that the HV battery is being charged, and a voltage above 2.5 V indicates that the HV battery is being discharged. The hybrid vehicle control ECU determines the amount of either charge or discharge amperage that is being received by the HV battery based on the signals that are input to terminal IB of the battery smart unit from the battery smart unit. The hybrid vehicle control ECU also calculates the SOC (state of charge) of the HV battery based on the accumulated amperage.











MONITOR DESCRIPTION

If the battery smart unit detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTC P0A1F-123 is output.
YES -- GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC
NO -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (BATTERY ECU - BATTERY CURRENT SENSOR)
CAUTION: Be sure to wear insulated gloves.
(a) Remove the service plug grip. Removal

(b) Remove the luggage compartment trim cover front. Removal

(c) Disconnect the frame wire. Removal

(d) Remove the battery bracket sub-assembly. Removal

(e) Remove the battery carrier. Removal

(f) Disconnect connector z13 from the battery smart unit.
(g) Disconnect the HV relay assembly (battery current sensor) connector.





(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):






Standard resistance (Check for short):





HINT: The wire harness is not available separately. If it cannot be repaired, replace the HV battery.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK BATTERY SMART UNIT (VIB VOLTAGE)
CAUTION: Be sure to wear insulated gloves.
(a) Connect connector z13 to the battery smart unit.
(b) Install the battery carrier. Installation

(c) Connect the auxiliary battery positive terminal cable of the frame wire. Installation

(d) Turn the power switch on (IG).





(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:





HINT: If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set.

NG -- REPLACE BATTERY SMART UNIT
OK -- Continue to next step.
4. CHECK BATTERY SMART UNIT (IB VOLTAGE)
CAUTION: Be sure to wear insulated gloves.
(a) Turn the power switch on (IG).





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





HINT: If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set.

NG -- REPLACE HV RELAY ASSEMBLY
OK -- REPLACE BATTERY SMART UNIT