Toyota Corolla Cross: MIL Circuit
DESCRIPTION
The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM.
The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL should be illuminated and should then turn off after the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the GTS.
WIRING DIAGRAM
PROCEDURE
| 1. |
CHECK THAT MIL IS ILLUMINATED |
(a) Perform troubleshooting in accordance with the table below.
|
MIL | Condition |
Proceed to |
|---|---|---|
| Illuminates → Turns off |
Ignition switch ON → engine is started |
A |
| Other than above |
- | B |
| A |
.gif) | CHECK FOR INTERMITTENT PROBLEMS |
|
.gif)
| 2. |
CHECK COMMUNICATION BETWEEN GTS AND ECM |
(a) Check the communication between the GTS and ECM.
HINT:
It can be checked using the "Engine" item of the Data List.
|
Result | Proceed to |
|---|---|
|
Communication is possible |
A |
| Communication is not possible |
B |
| B |
| GO TO VC OUTPUT CIRCUIT |
|
| 3. |
CHECK WHETHER DTC OUTPUT RECURS |
(a) Perform the Health Check using the GTS.
(b) Check if any DTCs have been detected. Note down any DTCs.
|
Result | Proceed to |
|---|---|
|
DTCs are not output | A |
|
Any DTCs is output | B |
HINT:
Check for detected DTCs output from other ECUs which relate to the MIL.
| B |
| REPAIR CIRCUIT INDICATED BY OUTPUT |
|
| 4. |
PERFORM ACTIVE TEST USING GTS |
(a) Enter the following menus.
Body Electrical > Combination Meter > Active Test|
Tester Display |
|---|
| Check Engine Warning |
(b) Check the status of the MIL while performing the Active Test.
|
Result | Proceed to |
|---|---|
|
Changes | A |
|
Does not change | B |
| A |
| REPLACE ECM
|
.gif)
| B |
| REPLACE COMBINATION METER ASSEMBLY
|
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If the ECM determines that the shift lever and accelerator pedal are operated abnormally, engine output is restricted and, when necessar
Rough Idling
DESCRIPTION
Problem Symptom Suspected Area
Trouble Area
Engine speed fluctuation due to abnormal combustion
Idle speed too low or high
Strong engine vibration due
SEE MORE:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Motor Generator Control System
DTC No. Detection Item
MIL Warning Indicate
Note Link
P033506 Crankshaft Position Sensor "A" Algorithm Based Failure
Comes on Master Warning:
Comes on SAE Code:
P0336
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. SECURE VEHICLE
(a) Fully apply the parking brake and chock a wheel.
CAUTION:
Make sure to apply the parking brake and chock a wheel before performing
this procedure.
If the vehicle is not secure and the shift lever is moved to N, the vehicle
may su
