Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
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(a) Disconnect the I49 air conditioning amplifier assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I49-6 (IG+) - I49-17 (GND) |
Power source (IG) | Ignition switch ON |
11 to 14 V |
|
Ignition switch off | Below 1 V | ||
|
I49-5 (B) - I49-17 (GND) |
Power source (Back-up) |
Always | 11 to 14 V |
|
I49-17 (GND) - Body ground |
Ground for main power supply |
Always | Below 1 Ω |
(c) Reconnect the I49 air conditioning amplifier assembly connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I49-7 (LIN1) - I49-17 (GND) |
LIN communication line |
Ignition switch ON, front wiper deicer switch on |
Pulse generation |
(e) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I49-22 (FDEF) - I49-17 (GND) |
Wiper Deicer signal | Ignition switch ON, front wiper deicer switch off |
11 to 14 V |
|
Ignition switch ON, front wiper deicer switch on |
Below 2.2 V |
CHECK AIR CONDITIONING CONTROL ASSEMBLY
(a) Disconnect the I37 air conditioning control assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I37-9 (IG+) - I37-13 (GND) |
Power source (IG) | Ignition switch ON |
11 to 14 V |
|
Ignition switch off | Below 1 V | ||
|
I37-13 (GND) - Body ground |
Ground for air conditioning control assembly |
Always | Below 1 Ω |
(c) Reconnect the I37 air conditioning control assembly connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I37-7 (LIN1) - I37-13 (GND) |
LIN communication line |
Ignition switch ON | Pulse generation |
(e) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I37-3 (DFAC) - I37-13 (GND) |
Wiper Deicer signal | Ignition switch ON, front wiper deicer switch off |
Below 1 V |
|
Ignition switch ON, front wiper deicer switch on |
11 to 14 V | ||
|
I37-11 (IND) - I37-13 (GND) |
Front wiper deicer switch indicator signal |
Ignition switch ON, front wiper deicer switch off |
11 to 14 V |
|
Ignition switch ON, front wiper deicer switch on |
Below 1 V |
READ NEXT:
Data List / Active Test
DATA LIST / ACTIVE TEST ACTIVE TEST HINT:
Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
55708 -
- -
2 FORWARD RE
SEE MORE:
Precaution
PRECAUTION PRECAUTION FOR BULB REPLACEMENT (a) Always prepare a new bulb for immediate replacement. While replacing the bulb, the lens may attract dust and moisture if the bulb is removed from the vehicle for a long time.
(b) Always replace a bulb with another bulb of the same wattage. (c) If only
Ignition Circuit
DESCRIPTION A direct ignition system is used on this vehicle. The direct ignition system is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, one spark plug is connected to the end of the secondary winding. High voltage is generated in
