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:
Lost Communication with ECM/PCM "A" Missing Message (U010087,U012687,U012987,U014087,U016387,U029387)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication
system connected to the parking assist ECU.
HINT:
If CAN communication system DTCs are stored, they may also be stored
in other systems.
DTC No.
Detection Item
DTC Detection
Precaution
PRECAUTION
PRECAUTION FOR REPLACING PART
(a) After replacing the radio and display receiver assembly or
DCM (telematics transceiver), some functions and services may not be available after
the ignition switch to ACC for first time or second time. Make sure to perform the
following operations
