P3021

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P3011-123-P3019-123,P3020-123-P3027-123: Battery Block 1 Becomes Weak

DTC P3011-123 - Battery Block 1 Becomes Weak

DTC P3012-123 - Battery Block 2 Becomes Weak

DTC P3013-123 - Battery Block 3 Becomes Weak

DTC P3014-123 - Battery Block 4 Becomes Weak

DTC P3015-123 - Battery Block 5 Becomes Weak

DTC P3016-123 - Battery Block 6 Becomes Weak

DTC P3017-123 - Battery Block 7 Becomes Weak

DTC P3018-123 - Battery Block 8 Becomes Weak

DTC P3019-123 - Battery Block 9 Becomes Weak

DTC P3020-123 - Battery Block 10 Becomes Weak

DTC P3021-123 - Battery Block 11 Becomes Weak

DTC P3022-123 - Battery Block 12 Becomes Weak

DTC P3023-123 - Battery Block 13 Becomes Weak

DTC P3024-123 - Battery Block 14 Becomes Weak

DTC P3025-123 - Battery Block 15 Becomes Weak

DTC P3026-123 - Battery Block 16 Becomes Weak

DTC P3027-123 - Battery Block 17 Becomes Weak

DESCRIPTION
The hybrid vehicle control ECU controls the SOC (state of charge) of the HV battery at a constant level while driving. The HV battery is composed of 34 modules, and each module consists of six 1.2 V cells in series. The battery smart unit monitors battery block voltage at 17 locations. Each battery block is composed of 2 modules in a set.









HINT:
- DTCs from P3011-123 to P3027-123 cannot be set unless the vehicle is driven for approximately 10 minutes after clearing the DTCs.

MONITOR DESCRIPTION

If there is an abnormal internal resistance or electromotive voltage in the battery blocks, the battery smart unit determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the HV control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTCS (DTC P0A1F-123 IS OUTPUT)
(a) Connect 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 BATTERY SMART UNIT
(a) Ensure the safety of the areas in front and at the back of the vehicle.
(b) Connect Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Select the following menu items: Powertrain / Hybrid Control / Data List / Battery Block Vol - V01 to V17.
(e) Fully warm up the engine and turn the air conditioning off.
(f) Firmly depress the brake pedal with your left foot.
(g) Move the shift lever to the D position.
(h) Record each battery block voltage in the data list ("Battery Block Vol - V01 to V17") while fully depressing the accelerator pedal.
(i) Compare the battery block voltages ("Battery Block Vol - V01 to V17") between the even and odd number groups in each combination shown in the table below.





(j) Check if the difference in voltage of each combination is 0.3 V or more.
Result:





HINT: Difference in voltage of each combination may be 0.3 V or more due to a battery smart unit internal error.

B -- REPLACE BATTERY SMART UNIT
A -- REPLACE HV BATTERY