Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
.png)
(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 |
