P0A1F-150 - Battery Energy Control Module

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A1F-150: Battery Energy Control Module
P0A1F-150 - Battery Energy Control Module

DESCRIPTION

The hybrid vehicle control ECU alerts the driver and performs fail-safe control based on error signals sent from the battery smart unit.





MONITOR DESCRIPTION

The hybrid vehicle control ECU calculates the differences between the received HV battery voltage, boost converter voltage, and inverter voltage. If any of the differences exceed prescribed values, the hybrid vehicle control ECU determines that there is a malfunction in the battery smart unit circuit. When the hybrid vehicle control ECU detects a malfunction, it 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 or disconnecting the low voltage connector of the inverter with converter assembly, 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. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- After completing repairs, restart the system (turn the power switch on (READY)) and recheck for DTCs Hybrid Control System.
PROCEDURE

1. CHECK AUXILIARY BATTERY P0A1F

NG -- CHARGE OR REPLACE AUXILIARY BATTERY
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE) P0A1F

NG -- CHECK FUSE (IGCT, IGCT NO. 2)

OK -- REPLACE BATTERY SMART UNIT Components

3. CHECK FUSE (IGCT, IGCT NO. 2) P0A1F

NG -- REPLACE FUSE (IGCT, IGCT NO. 2)
OK -- Continue to next step.

4. CHECK RELAY (IGCT) P0A1F

NG -- REPLACE RELAY (IGCT)
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (IGCT RELAY - BATTERY SMART UNIT) P0A1F

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- CHECK AND REPAIR POWER SOURCE CIRCUIT