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DTC P3000/388 Battery Control System Malfunction: Circuit Description

The document outlines the diagnostic trouble code (DTC) P3000/388 related to the battery control system malfunction in a hybrid vehicle. It details the conditions leading to the DTC, inspection procedures, and troubleshooting steps, including checking the gasoline level and engine start status. If the engine does not start, it recommends replacing the high voltage supply battery assembly or charging the HV battery in idle status.

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183 views2 pages

DTC P3000/388 Battery Control System Malfunction: Circuit Description

The document outlines the diagnostic trouble code (DTC) P3000/388 related to the battery control system malfunction in a hybrid vehicle. It details the conditions leading to the DTC, inspection procedures, and troubleshooting steps, including checking the gasoline level and engine start status. If the engine does not start, it recommends replacing the high voltage supply battery assembly or charging the HV battery in idle status.

Uploaded by

carcycleinfo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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05–778

DIAGNOSTICS – HYBRID CONTROL SYSTEM 05JBX–01

DTC P3000/388 BATTERY CONTROL SYSTEM


MALFUNCTION

CIRCUIT DESCRIPTION
Based on the malfunction signal received from the battery ECU, the system alerts the driver and effects fail–
safe control.
This DTC is output when the SOC (state of charge) of the HV battery decreases as a result of leaving the
vehicle in the N position, running out of fuel, or malfunction in the HV control system.
DTC No. INF Code DTC Detection Condition Trouble Area
 HV control system
Abnormal signal input from battery ECU (discharge
P3000 388  Fuel shortage
inhibition control malfunction)
 HV battery assembly

INSPECTION PROCEDURE
1 READ OUTPUT DTC(HV ECU)

(a) Connect the hand–held tester to the DLC3.


(b) Turn the power switch ON (IG).
(c) Turn the hand–held tester ON.
(d) On the hand–held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / HV ECU /
DTC INFO / TROUBLE CODES.
(e) Read DTCs.
Result: DTC P3000 (INF 388) and other DTCs are output
HINT:
If any other codes besides P3000 (INF 388) are output, perform troubleshooting for those DTCs first.
YES GO TO RELEVANT DTC CHART
(See page 05–440)

NO

2 CHECK AMOUNT OF GASOLINE

(a) Turn the power switch ON (IG).


(b) Check the amount of gasoline with the fuel gauge in the meter.
OK: Appropriate amount of gasoline
NG REFUEL GASOLINE

OK

3 CHECK IF ENGINE STARTS

(a) Turn the power switch ON (READY).


(b) Check if the engine starts.
OK: The engine starts

2004 Prius – Preliminary Release (RM1075U)

Author: Date: 942


05–779
DIAGNOSTICS – HYBRID CONTROL SYSTEM

NO REPLACE HV SUPPLY BATTERY ASSY


(See page 21–54)

YES

LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING
STOPS

2004 Prius – Preliminary Release (RM1075U)

Author: Date: 943

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