Toyota Yaris: Active Torque Split Awd System / AWD Control Switch Circuit
DESCRIPTION
Operate the AWD control switch (No. 2 combination switch assembly) and check that the Data List display and the messages in the multi-information display change according to the switch operation.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the ECM, refer to Registration.
Click here
PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Using the GTS, check for DTCs.
Click here
(b) Check that DTCs indicating a CAN communication system malfunction are not output.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B |
 | INSPECT CAN COMMUNICATION SYSTEM |
|
| 2. | READ VALUE USING GTS (DRIVE MODE STATUS) |
(a) According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Drive Mode Status | Drive Mode Status | Normal / Power / Sport / Sport / Sport+ / Comfort / ECO / Track | - | - |
| Tester Display |
|---|
| Drive Mode Status |
(b) Operate the AWD control switch (No. 2 combination switch assembly) and check that the Data List display and the messages in the multi-information display change according to the switch operation.
OK:
| AWD Control Switch (No. 2 Combination Switch Assembly) Operation | Data List Display | Multi-information Display Message |
|---|---|---|
| PUSH NORMAL | Normal | NORMAL |
| SPORT | Sport | SPORT |
| TRACK | Track | TRACK |
| Result | Proceed to |
|---|---|
| When the switch is operated, the Data List display and message do not change | A |
| When the switch is operated, the Data List display changes, but the message does not change | B |
| When the switch is operated, the Data List display and indicator change normally | C |
| B |
 | GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
| C |
 | CHECK INTERMITTENT PROBLEMS |
|
| 3. | INSPECT NO. 2 COMBINATION SWITCH ASSEMBLY |
Click here
| NG |
 | REPLACE NO. 2 COMBINATION SWITCH ASSEMBLY |
|
| 4. | CHECK HARNESS AND CONNECTOR (ECM - NO. 2 COMBINATION SWITCH ASSEMBLY) |
(a) Turn the ignition switch off.
(b) Disconnect the A106 ECM connector.
(c) Disconnect the H142 AWD control switch (No. 2 combination switch assembly) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A106-24 (TRMS) - H142-6 (B) | Always | Below 1 Ω |
| A106-31 (PWMS) - H142-4 (2ND) | Always | Below 1 Ω |
| A106-51 (SPCN) - H142-5 (B) | Always | Below 1 Ω |
| H142-3 (GND) - Body ground | Always | Below 1 Ω |
| A106-24 (TRMS) or H142-6 (B) - Body ground | Always | 10 kΩ or higher |
| A106-31 (PWMS) or H142-4 (2ND) - Body ground | Always | 10 kΩ or higher |
| A106-24 (TRMS) or H142-6 (B) - A106-31 (PWMS) or H142-4 (2ND) | Always | 10 kΩ or higher |
| OK |
 | REPLACE ECM |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
AWD Warning Light does not Come ON
DESCRIPTION Refer to "AWD Warning Light Remains ON". Click here
WIRING DIAGRAM Refer to "AWD Warning Light Remains ON". Click here
CAUTION / NOTICE / HINT Refer to "AWD Warning Light Remains ON"...
Other information:
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Liftgate/Trunk Lid
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
