Hybrid Battery System (Diagnostics - Introduction): Diagnosis Lexus HS I

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. *: Use the Techstream.
2. Use the following procedure to troubleshoot the hybrid control system.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS NEXT: Go to next step
3. CONNECT TECHSTREAM TO THE DLC3* HINT: If the display on the tester indicates a communication fault, inspect the DLC3. NEXT: Go to next step
4. CHECK DTC AND SAVE FREEZE FRAME DATA*. Refer to «DTC CHECK / CLEAR»(ref-398248-S06746891392011051600000) . Refer to «FREEZE FRAME DATA»(ref-398248-S09827115012011051600000) 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: Go to next step
5. CLEAR DTC AND FREEZE FRAME DATA*. Refer to «DTC CHECK / CLEAR»(ref-398248-S06746891392011051600000) NEXT: Go to next step
6. CONDUCT VISUAL INSPECTION NEXT: Go to next step
7. CONFIRM PROBLEM SYMPTOMS HINT: If the engine does not start, perform steps 9 and 11 first. Result Result Proceed to Malfunction does not occur A Malfunction occurs B B --> GO TO STEP 10 A: Go to next step
8. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS NEXT: Go to next step
9. CHECK FOR DTCS*. Refer to «DTC CHECK / CLEAR»(ref-398248-S06746891392011051600000) Result Result Proceed to DTC is output A DTC is not output B B --> GO TO STEP 11 A: Go to next step
10. REFER TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398248-S38656251752011051600000) NEXT --> GO TO STEP 13
11. CONDUCT BASIC INSPECTION Result Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B B --> GO TO STEP 15 A: Go to next step
12. CHECK ECU POWER SOURCE CIRCUIT NEXT: Go to next step
13. CONDUCT CIRCUIT INSPECTION Result Result Proceed to Malfunction not confirmed A Malfunction confirmed B B --> GO TO STEP 16 A: Go to next step
14. CHECK FOR INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-398248-S16720866082011051600000) NEXT --> GO TO STEP 16
15. CONDUCT PARTS INSPECTION NEXT: Go to next step
16. IDENTIFY PROBLEM NEXT: Go to next step
17. ADJUST AND/OR REPAIR NEXT: Go to next step
18. CONDUCT CONFIRMATION TEST NEXT --> COMPLETED

DTC CHECK / CLEAR

1. CHECK FOR DTCS Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Check the DTCs and freeze frame data, and then write them down. Check the details of the DTCs. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398248-S38656251752011051600000) .
2. CHECK FREEZE FRAME DATA AND INFORMATION If a DTC is present, select it in order to display its freeze frame data. Read the freeze frame data recorded when the DTC was set. NOTE: A 3-digit information code (INF code) will be displayed as the value for one of the Information 1 to Information 5 lines. Read the information for the information code. Select the item from among Information 1 to Information 5 that has an information code and click the engine icon to view the additional information.
3. CHECK FOR DTCS (SYSTEMS OTHER THAN HYBRID VEHICLE CONTROL ECU) HINT: The hybrid vehicle control ECU maintains communication with other computers, including the skid control ECU and power steering ECU. Therefore, if the hybrid vehicle control ECU outputs a warning, it is necessary to check and record the DTCs of all systems. If DTCs are present, check the relevant systems. HINT: If DTCs for the CAN communication system are present in addition to other DTCs, first troubleshoot and repair any malfunctions in the CAN communication system.
4. CLEAR DTCS NOTE: Clearing the DTCs will also clear the freeze frame data, information. Refer to «FREEZE FRAME DATA»(ref-398248-S09827115012011051600000) , and operation history data. Refer to «OPERATION HISTORY DATA»(ref-398238-S25352349252011051600000) . Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Check that park (P) is selected. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Clear DTCs and freeze frame data.

DATA LIST / ACTIVE TEST

1. Data List NOTE: Some Data List values may vary significantly if there are slight differences in the environment in which the vehicle is operating when measurements are obtained. Variations may also occur due to aging of the vehicle. Due to these considerations, it is not always possible to provide definite values to be used for judgment of malfunctions. It is possible that a malfunction may be present even if measured values are within the reference range. In the event of a problem with intricate symptoms, collect sample data from another vehicle of the same model operating under identical conditions in order to reach an overall judgment by comparing all the items in the Data List. Connect the Techstream to the DLC3. Turn the power switch on (IG). Enter the following menus: Powertrain / Hybrid Control / Data List. Check the results by referring to the following table. HINT: For the data list. Refer to «DATA LIST / ACTIVE TEST»(ref-398094-S15256638372011051600000) .
2. Active Test Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data list information can be displayed while performing Active Tests. NOTE: It is necessary to use caution, because if the tester DLC connector becomes disconnected or if a communication error occurs during an Active Test, the vehicle could become inoperative (the READY indicator may go off). Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Hybrid Control / Active Test. According to the display on the Techstream perform the appropriate active test. HINT: For the active test chart. Refer to «DATA LIST / ACTIVE TEST»(ref-398094-S15256638372011051600000) .

DIAGNOSTIC TROUBLE CODE CHART

HYBRID BATTERY SYSTEM