From 08/2009

HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* *: Use the Techstream
* Use the following procedure to troubleshoot the hybrid battery system.
1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS

NEXT -- Continue to next step.

3. CONNECT TECHSTREAM TO THE DLC3*

HINT
If the display on the tester indicates a communication fault, inspect the DLC3.

NEXT -- Continue to next step.

4. CHECK DTC AND SAVE FREEZE FRAME DATA* Hybrid Battery System, Freeze Frame Data

HINT
* Make sure to save freeze frame data because the data is necessary for a simulation test.
* For the hybrid vehicle control system, there are many DTCs, many of which can be stored due to a single malfunction. As a result, in some of the diagnosis procedures an instruction is provided to check for other DTCs and their corresponding INF codes. By following the diagnosis path based on the combination of output DTCs and INF codes, it is possible to narrow down the problem early and avoid unnecessary diagnosis.
NEXT -- Continue to next step.

5. CLEAR DTC AND FREEZE FRAME DATA* Hybrid Battery System

NEXT -- Continue to next step.

6. CONDUCT VISUAL INSPECTION

NEXT -- Continue to next step.

7. CONFIRM PROBLEM SYMPTOMS

HINT
If the engine does not start, perform steps 9 and 11 first.

Result:





B -- GO TO STEP 10
A -- Continue to next step.

8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS

NEXT -- Continue to next step.

9. CHECK FOR DTCS* Hybrid Battery System

Result:





B -- GO TO STEP 11
A -- Continue to next step.

10. REFER TO DTC CHART Hybrid Battery System

NEXT -- GO TO STEP 13

11. CONDUCT BASIC INSPECTION

Result:





B -- GO TO STEP 15
A -- Continue to next step.

12. CHECK ECU POWER SOURCE CIRCUIT

NEXT -- Continue to next step.

13. CONDUCT CIRCUIT INSPECTION

Result:





B -- GO TO STEP 16
A -- Continue to next step.

14. CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems

NEXT -- GO TO STEP 16

15. CONDUCT PARTS INSPECTION

NEXT -- Continue to next step.

16. IDENTIFY PROBLEM

NEXT -- Continue to next step.

17. ADJUST AND/OR REPAIR

NEXT -- Continue to next step.

18. CONDUCT CONFIRMATION TEST

NEXT -- END