P3018

P112 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P3011: Battery Block 1 Becomes Weak

DTC P3011 - Battery Block 1 Becomes Weak

DTC P3012 - Battery Block 2 Becomes Weak

DTC P3013 - Battery Block 3 Becomes Weak

DTC P3014 - Battery Block 4 Becomes Weak

DTC P3015 - Battery Block 5 Becomes Weak

DTC P3016 - Battery Block 6 Becomes Weak

DTC P3017 - Battery Block 7 Becomes Weak

DTC P3018 - Battery Block 8 Becomes Weak

DTC P3019 - Battery Block 9 Becomes Weak

DTC P3020 - Battery Block 10 Becomes Weak

DTC P3021 - Battery Block 11 Becomes Weak

DTC P3022 - Battery Block 12 Becomes Weak

DTC P3023 - Battery Block 13 Becomes Weak

DTC P3024 - Battery Block 14 Becomes Weak

DESCRIPTION

The HV battery assembly consists of nickel hydride batteries. Nickel hydride batteries do not require external charging. The SOC (state of charge) of the HV battery is maintained at a constant voltage level by the hybrid vehicle control ECU while the vehicle is being driven. In the HV battery assembly, 28 modules are connected in series, and each module has six 1.2 V cells that are connected in series. Thus, the HV battery assembly contains a total of 168 cells which produce 201.6 V.
The battery ECU, which monitors two modules as a single battery block, detects the battery block voltage at a total of 14 locations.










MONITOR DESCRIPTION

If there is an abnormal internal resistance or electromotive voltage in the battery blocks, the battery ECU determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU illuminates the MIL and sets a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ DTC OUTPUT (DTC P0A1F IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG) and the tester ON.
(c) Enter the following menus: Powertrain / HV Battery / DTC.
(d) Read DTCs.
Result:
DTC P0A1F is output
YES -- REPLACE BATTERY ECU
NO -- Continue to next step.

2. CHECK BATTERY BLOCK VOLTAGE
(a) Depress the brake pedal and turn the power switch ON (IG).
(b) Depress the brake pedal and accelerator pedal to charge with the HV battery.
(c) Read the battery block voltage in the DATA LIST. Enter the following menus: Powertrain / HV Battery / Data List. Read the values of "V1 Batt Block" to "V14 Batt Block".
(d) Compare the voltages as listed below.

- V1 Batt Block and V2 Batt Block
- V3 Batt Block and V4 Batt Block
- V5 Batt Block and V6 Batt Block
- V7 Batt Block and V8 Batt Block
- V9 Batt Block and V10 Batt Block
- V11 Batt Block and V12 Batt Block
- V13 Batt Block and V14 Batt Block

Result:
All of the battery voltage differences are 0.3 V or more.
YES -- REPLACE BATTERY ECU
NO -- REPLACE HV SUPPLY BATTERY ASSEMBLY