P0A1F-150

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A1F-150, P0AFC-150: Battery Energy Control Module
P0AFC-150 - Hybrid Battery Pack Sensor 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

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY).

6. Wait for 10 seconds or more.

7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

8. Check that the permanent DTCs are cleared.

9. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

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

(a) Turn the power switch off.

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

Standard voltage:

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

2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

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

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

Standard voltage:

HINT
- For the removal and installation procedures related to the No. 1 battery pack wire connector inspection, Components.
- Perform this inspection with the No. 1 battery pack wire connected.

NG -- CHECK FUSE (IGCT3 FUSE)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR - BATTERY SMART UNIT)

(a) Turn the power switch off.

(b) Disconnect the No. 1 battery pack wire connector.

(c) Disconnect connector z36 from the battery smart unit.

HINT
For the removal and installation procedures related to the battery smart unit, Components.

(d) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BATTERY SMART UNIT Components

4. CHECK FUSE (IGCT3 FUSE)

(a) Remove the IGCT3 fuse from the luggage room junction block assembly.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPLACE FUSE (IGCT3 FUSE)
OK -- Continue to next step.

5. CHECK FUSE (IGCT2 NO. 2 FUSE)

(a) Remove the IGCT2 NO. 2 fuse from the engine room No. 3 relay block.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPLACE FUSE (IGCT2 NO. 2 FUSE)
OK -- Continue to next step.

6. INSPECT RELAY (IGCT2)

(a) Remove the IGCT2 relay from the engine room No. 2 relay block.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG -- REPLACE RELAY (IGCT2)
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR - IGCT2 RELAY)

CAUTION:
Be sure to wear insulated gloves.

(a) Disconnect the No. 1 battery pack wire connector.

(b) Install the IGCT3 fuse to the luggage room junction block assembly.

(d) Remove the IGCT2 relay from the engine room No. 2 relay block.

(e) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- CHECK AND REPAIR POWER SOURCE CIRCUIT (IGCT2 RELAY)