Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK 4WD ECU ASSEMBLY
(a) Measure the voltage and resistance of the connector.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
O201-6 (CANH) - O201-5 (CANL) |
CAN communication line |
Cable disconnected from negative (-) auxiliary battery terminal |
54 to 69 Ω |
|
O201-4 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
|
O201-3 (IG1) - O201-4 (GND) |
Power source voltage |
Ignition switch ON |
11 to 14 V |
|
O201-2 (SLC+) - O201-1 (SLC-) |
4WD linear solenoid signal |
D position, engine idling |
Pulse generation (See waveform 1) |
If the result is not as specified, the 4WD ECU assembly may have a malfunction.
(b) Using an oscilloscope, check the waveform 1.
Waveform 1 (Reference)|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
O201-2 (SLC+) - O201-1 (SLC-) |
|
Tester Range |
2 V/DIV., 1 msec./DIV. |
|
Condition |
D position, Idling |
READ NEXT:
Freeze Frame Data
FREEZE FRAME DATA
FREEZE FRAME DATA
(a) When a DTC is stored, the 4WD ECU assembly stores the current vehicle state
as Freeze Frame Data.
HINT:
Freeze Frame Data at the time a DTC is stored:
Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE CHART
Dynamic Torque Control AWD System
DTC No.
Trouble Area
AWD Warning message
Fail-safe Operation
Memory
Data List / Active Test
DATA LIST / ACTIVE TEST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether
SEE MORE:
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 INLET NO. 1 AIR CLEANER
17751 -
- -
2 AIR CLEANER CAP WITH AIR CLEANER HOSE
- -
- -
3 THROTTLE BODY WITH MOTOR ASSEMBLY
220
VC Output Circuit
DESCRIPTION The ECM constantly generates a 5 V power source voltage from the auxiliary battery voltage supplied to the +B, +B2 (BATT) terminals to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit.
When the VC circuit has a short circuit, th
