Toyota Yaris: Manual Transaxle System / Pattern Select Switch iMT Mode Circuit
DESCRIPTION
Operating the iMT switch illuminates the iMT indicator light in the combination meter assembly. This displays the iMT system standby condition.
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK DTC OUTPUT (SFI SYSTEM) |
(a) Check for SFI system DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B |
 | CHECK FOR INTERMITTENT PROBLEMS |
|
| 2. | INSPECT iMT SWITCH (COMBINATION SWITCH ASSEMBLY) |
| (a) Disconnect the H18 iMT Switch (combination switch assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 8 (MSW1) - 5 (E) | Switch pushed | Below 1 Ω |
| 8 (MSW1) - 5 (E) | Switch not pushed | 10 kΩ or higher |
(c) Connect the H18 iMT Switch (combination switch assembly) connector.
| NG |
 | REPLACE iMT SWITCH (COMBINATION SWITCH ASSEMBLY) |
|
| 3. | CHECK HARNESS AND CONNECTOR (iMT SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND) |
(a) Disconnect the H18 iMT switch (combination switch assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| H18-5 (E) - Body ground | Always | Below 1 Ω |
(c) Connect the H18 iMT switch (combination switch assembly) connector.
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (iMT SWITCH (COMBINATION SWITCH ASSEMBLY) - ECM) |
(a) Disconnect the H18 iMT switch (combination switch assembly) connector.
(b) Disconnect the A106 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| H18-8 (MSW1) -A106-4 (MTMS) | Always | Below 1 Ω |
| H18-8 (MSW1) or A106-4 (MTMS) - Body ground | Always | 10 kΩ or higher |
(d) Connect the A106 ECM connector.
(e) Connect the H18 iMT switch (combination switch assembly) connector.
| OK |
 | REPLACE ECM |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Other information:
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Lack of Power
DESCRIPTION Problem Symptom Suspected Area Trouble Area Engine speed fluctuation due to abnormal combustion Idle speed too low or high Strong engine vibration due to above symptoms Ignition malfunction Deviation in air fuel ratio (Excessive or insufficient intake air volume or fuel supply) Insufficient compression Changes in load from another system Ignition system Spark plug Ignition coil assembly Fuel system Direct fuel injector assembly Port fuel injector assembly Fuel pump assembly (for high pressure side) Fuel pump (for low pressure side) Fuel pump control circuit Fuel suction plate sub-assembly Fuel main valve assembly Fuel line Purge VSV system Fuel quality (existence of foreign matter, degradation) Intake and exhaust systems Mass air flow meter sub-assembly Intake system (Air leaks or deposit accumulation) Throttle body with motor assembly Air fuel ratio sensor (sensor 1) Air fuel ratio sensor (sensor 2) Cam timing oil control solenoid assembly Variable Valve Timing system (VVT system) Other control systems ECM Wire harness or connector Knock control sensor Engine coolant temperature sensor Engine Water control valve Engine assembly High load from another system Air conditioning system Power steering system Electrical load signal system SYMPTOM AND CAUSE OF SYSTEM MALFUNCTION HINT: The following are descriptions of the characteristics of each system malfunction...
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C..
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Refueling
Before refueling, close all the doors, windows, and the liftgate/trunk lid, and switch the ignition OFF.
To open the fuel-filler lid, pull the remote fuel-filler lid release.
