Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the power steering system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | INSPECT AUXILIARY BATTERY |
(a) Turn the power switch off.
(b) Measure the voltage of the auxiliary battery.
Standard Voltage:
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
|
| 3. | CHECK DTC AND FREEZE FRAME DATA* |
HINT:
Refer to DTC Check / Clear.
Chassis > EMPS > Trouble Codes
|
| 4. | PROBLEM SYMPTOM CONFIRMATION |
| Result | Proceed to |
|---|---|
| Symptom does not occur. | A |
| Symptom occurs. | B |
| B |  | GO TO STEP 6 |
|
| 5. | SYMPTOM SIMULATION |
|
| 6. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Check for DTCs.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are not output. | A |
| CAN communication system DTCs are output. | B |
HINT:
- If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
- If communication to the rack and pinion power steering gear assembly cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the rack and pinion power steering gear assembly, and the IG circuit of the rack and pinion power steering gear assembly.
| B | | PROCEED TO CAN COMMUNICATION SYSTEM |
|
| 7. | CHECK FOR DTC* |
(a) Check for DTCs.
Chassis > EMPS > Trouble CodesHINT:
Refer to Diagnostic Trouble Code Chart when any DTCs are output.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| B | | GO TO STEP 10 |
|
| 8. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table. | A |
| Fault is listed in Problem Symptoms Table. | B |
| B | | GO TO STEP 10 |
|
| 9. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Refer to Terminals of ECU.
Click here
(b) Refer to Data List / Active Test.
Click here
|
| 10. | REPAIR OR REPLACE |
|
| 11. | CONFIRMATION TEST |
| NEXT | | END |
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