DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK BATTERY
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (COMBINATION METER)
VARIABLE GEAR RATIO STEERING SYSTEM - Master Warning Light Malfunction
DESCRIPTION
If the steering control ECU detects that the VGRS system has a malfunction, warning information is transmitted to the combination meter via CAN communication.
The combination meter will turn the master warning light on based on this information.
Warning information is transmitted via the following route:
Steering control ECU → (CAN) → Network gateway ECU → (CAN) → Combination meter
Connecting terminals TC and CG of the DLC3 makes the master warning light blink and outputs DTCs.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Check that there is no problem in CAN communication before performing the following procedure.
- If there are any problems in CAN communication, first troubleshoot them and then proceed to the troubleshooting below.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| Positive (+) battery terminal - negative (-) battery terminal | Always | 11 to 14 V |
| | RECHARGE OR REPLACE BATTERY |
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| 2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (COMBINATION METER) |
Select the Active Test, use the intelligent tester to generate a control command, and then check that the master warning light turns on/off.
Combination Meter:| Tester Display | Test Part | Control Range | Diagnostic Note |
| Master Warning | Master warning light | OFF/ON | Confirm that the vehicle is stopped and the engine is running |
- OK:
- Indicator light turns on/off.
Result| Result | Proceed to |
| NG | A |
| OK (for LHD) | B |
| OK (for RHD) | C |
| | REPLACE STEERING CONTROL ECU ()
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| | REPLACE STEERING CONTROL ECU ()
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| A | |
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| GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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