P3021

P310 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

DESCRIPTION
The HV battery uses nickel metal-hydride batteries and does not require external charging. The hybrid vehicle control ECU controls the SOC (state of charge) of the HV battery at a constant level during driving. The HV battery is composed of 30 modules, and each module consists of eight 1.2 V cells in series. The battery smart unit monitors battery block voltage at 15 locations. Each battery block is composed of 2 modules in a set.










HINT: P3011-123 and P3025-123 will not 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 illuminates the MIL and sets a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs Hybrid Battery System.
Result:






B -- GO TO DTC CHART Diagnostic Trouble Code Descriptions (P0A1F-123)
A -- Continue to next step.
2. INSPECT BATTERY SMART UNIT
(a) Ensure the safety of the areas in front and at the back of the vehicle.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Select the following menu items: Powertrain / Hybrid Control / Data List / V1 to 15 Batt block.
(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 from the data list (V1 to 15 Batt block) while fully depressing the accelerator pedal.
(i) Compare the battery block voltages (V1 to 15 Batt block) 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 is 0.3 V or more due to a battery smart unit internal error.

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