P0AC1

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

WITH CONSULT
1.Turn ignition switch ON and wait at least 10 seconds.
2.Select "Self Diagnostic Result" mode of "HV BAT" using CONSULT.
Is P0AC1 detected?
YES- .
NO- INSPECTION END


Diagnosis Procedure


WARNING:
- Because hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.
- Be sure to remove the service plug in order to shut off the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
- Be sure to put the removed service plug in your pocket and carry it with you so that another person does not accidentally connect it while work is in progress.
- Be sure to wear insulating protective gear consisting of glove, shoes and glasses before beginning work on the high voltage system.
- Clearly identify the persons responsible for high voltage work and ensure that other persons do not touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or similar item to prevent other persons from contacting them.
- High Voltage Precautions.

CAUTION:
There is the possibility of a malfunction occurring if the vehicle is changed to READY status while the service plug is removed. Therefore do not change the vehicle to READY status unless instructed to do so in the Service Manual.

1. PERFORM SELF-DIAGNOSIS

WITH CONSULT
1.Perform "All DTC Reading" with CONSULT.
2.Check if the "P0AA0" or "P0AA1" are detected in "Self Diagnostic Result" of "EV/HEV".
Is DTC detected?
YES- Perform diagnosis procedure of hybrid control system. Testing and Inspection.
NO- GO TO 2.

2. PRECONDITIONING


WARNING:
Shut off high voltage circuit. How to Cut Off High Voltage.
Remove Li-ion battery. Removal and Installation.
- GO TO 3.

3. CHECK CURRENT SENSOR HARNESS

1.Disconnect battery junction box harness connector.
2.Disconnect Li-ion battery controller harness connector.
3.Check continuity between battery junction box (current sensor) harness connector and Li-ion battery controller harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK CURRENT SENSOR

.
Is the inspection result normal?
YES- GO TO 5.
NO- Replace battery junction box (current sensor). Service and Repair.

5. CHECK RESISTANCE OF LI-ION BATTERY CONTROLLER

Check resistance between Li-ion battery controller terminals.





Is the inspection result normal?
YES- Replace Li-ion battery controller [Li-Ion Battery Controller Disassembly and Assembly] and battery junction box [Service and Repair].
NO- Replace Li-ion battery controller. Li-Ion Battery Controller Disassembly and Assembly.


Component Inspection


1. CHECK CURRENT SENSOR

Check resistance between battery junction box (current sensor) terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace battery junction box. Service and Repair.