P3026

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P3011-123: 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

DTC P3028-123 - Battery Block 18 Becomes Weak

DTC P3029-123 - Battery Block 19 or 20 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 20 modules, and each module consists of 12 1.2 V cells in series. The battery smart unit monitors battery block voltage at 20 locations.









HINT: This DTC cannot be set unless the vehicle is driven for approximately 10 minutes after clearing the DTCs. Two trip detection logic is used. After the first road test, turn the power switch off and perform a road test again.





HINT: These DTCs 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 hybrid vehicle 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 the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:






B -- GO TO DTC CHART (P0A1F-123)
A -- 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 the intelligent tester or Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST / V1 to 20 BATT BLOCK.
(2) Techstream - Select: Powertrain / Hybrid Control / Data List / Battery Block Vol - V01 to V20.
(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 V20") while fully depressing the accelerator pedal.
(i) Compare the battery block voltages ("Battery Block Vol - V01 to V20") 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.
- Refer to the wiring diagram for DTC P0A80-123 P0A80.

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