P0A1F-123

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A1F-123: Battery Energy Control Module

DTC P0A1F-123 - 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

If the battery smart unit detects an internal malfunction in the unit itself, 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.
- After completing repairs, restart the system (turn the power switch on (READY)) and recheck for DTCs. Hybrid Battery System

PROCEDURE

1. CHECK AUXILIARY BATTERY
(a) Measure the voltage between the terminals of the auxiliary battery.
Standard voltage:
11 to 14 V
NG -- CHARGE OR REPLACE AUXILIARY BATTERY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)
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) Connect the auxiliary battery positive terminal cable of the frame wire. Installation

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





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






OK -- REPLACE BATTERY SMART UNIT
NG -- Continue to next step.
3. CHECK FUSE (IGCT NO. 3 FUSE)





(a) Remove the IGCT NO. 3 fuse from the engine room R/B No. 1.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE (IGCT NO.3 FUSE)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - INTEGRATION RELAY (IGCT RELAY))
CAUTION: Be sure to wear insulated gloves.
(a) Install the IGCT NO. 3 fuse to the engine room R/B No. 1.
(b) Remove the integration relay from the engine room R/B No. 1.
(c) Disconnect connector N2 from the battery smart unit.





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






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- CHECK AND REPAIR POWER SOURCE CIRCUIT