Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Touch select 2-4 and high-low system
TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Switch from 2WD to 4WD HIGH impossible (Only 4HI indicator light, or 4HI and 4LO indicator lights blink at 0.2 seconds intervals) | Harness or connector | ON-VEHICLE INSPECTION |
| Transfer shift actuator | ON-VEHICLE INSPECTION | |
| A.D.D. actuator | ON-VEHICLE INSPECTION | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| Transfer | INSPECTION | |
| Switch from 4WD HIGH to 4WD LOW impossible (Only 4LO indicator light, or 4HI and 4LO indicator lights blink at 0.2 seconds intervals) | Harness or connector | ON-VEHICLE INSPECTION |
| Transfer shift actuator | ON-VEHICLE INSPECTION | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| Transfer | INSPECTION | |
| Switch from 4WD HIGH to 2WD impossible (4HI and 4LO indicator lights blink at 0.2 seconds intervals) | Harness or connector | ON-VEHICLE INSPECTION |
| Transfer shift actuator | ON-VEHICLE INSPECTION | |
| A.D.D. actuator | ON-VEHICLE INSPECTION | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| Transfer | INSPECTION | |
| Switch from 4WD LOW to 4WD HIGH impossible (Only 4LO indicator light, or 4HI and 4LO indicator lights blink at 0.2 seconds intervals) | Harness or connector | ON-VEHICLE INSPECTION |
| Transfer shift actuator | ON-VEHICLE INSPECTION | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| Transfer | INSPECTION | |
| 4HI indicator light does not come on | Harness or connector | ON-VEHICLE INSPECTION |
| 4WD fuse | ON-VEHICLE INSPECTION | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| 4HI indicator light remains on | 4WD control switch | ON-VEHICLE INSPECTION |
| 4WD control ECU | TERMINALS OF ECU | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| 4LO indicator light does not come on | Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING |
| 4WD control switch | ON-VEHICLE INSPECTION | |
| 4WD control ECU | TERMINALS OF ECU | |
| 4HI indicator light remains on | 4WD control switch | ON-VEHICLE INSPECTION |
| 4WD control ECU | TERMINALS OF ECU | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| HINT: *: Blinking during the return control is not a malfunction. |
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