Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK TRANSPONDER KEY ECU ASSEMBLY
(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Measure the resistance and voltage 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 |
Related Data List Item / DTC |
|---|---|---|---|---|
|
I67-4 (+B) - I67-12 (GND) |
Auxiliary battery power supply |
Always | 11 to 14 V |
+B |
|
I67-5 (KSW) - I67-12 (GND) |
Unlock warning switch signal |
No door control transmitter assembly in ignition key cylinder |
10 kΩ or higher |
|
| Door control transmitter assembly in ignition key cylinder |
Below 1 Ω | |||
|
I67-12 (GND) - Body ground |
Ground | Always |
Below 1 Ω | - |
(c) Reconnect the I67 transponder key ECU assembly connector.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
Related Data List Item / DTC |
|---|---|---|---|---|
|
I67-6 (IG) - I67-12 (GND) |
Ignition switch signal |
Ignition switch off | Below 1 V |
IG SW |
| Ignition switch ON |
11 to 14 V | |||
|
I67-8 (IND) - I67-12 (GND) |
Security indicator light signal |
No door control transmitter assembly in ignition key cylinder, or 20 sec. elapsed after turning ignition switch to ACC or off (immobiliser system set) |
Pulse generation |
Immobiliser |
|
Door control transmitter assembly in ignition key cylinder (immobiliser system unset) |
Below 1 V | |||
|
I67-9 (D) - I67-12 (GND) |
DLC3 communication | Without communication |
Below 1 V |
- |
| During communication |
Pulse generation | |||
|
I67-2 (ANT1) - I67-12 (GND) |
Transponder key amplifier power source |
No door control transmitter assembly in ignition key cylinder |
Below 1 V |
- |
| Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
Pulse generation (See waveform 1) | |||
|
I67-3 (ANT2) - I67-12 (GND) |
Transponder key amplifier communication signal |
No door control transmitter assembly in ignition key cylinder |
Below 1 V |
- |
| Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
Pulse generation (See waveform 2) | |||
|
I67-10 (EFII) - I67-12 (GND) |
ECM input signal | Ignition switch off |
11 to 14 V |
- |
| Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
Pulse generation (See waveform 3) | |||
|
I67-11 (EFIO) - I67-12 (GND) |
ECM output signal | Ignition switch off |
Below 1 V |
- |
| Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
Pulse generation (See waveform 4) |
(e) Using an oscilloscope, check the waveform.
(1) Waveform 1 (Reference)
|
Item | Content |
|---|---|
|
Tester Connection | I67-2 (ANT1) - I67-12 (GND) |
|
Tool Setting | 20 V/DIV., 2 s./DIV. |
|
Condition | Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
(2) Waveform 2 (Reference)
|
Item | Content |
|---|---|
|
Tester Connection | I67-3 (ANT2) - I67-12 (GND) |
|
Tool Setting | 20 V/DIV., 2 s./DIV. |
|
Condition | Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
(3) Waveform 3 (Reference)
|
*a | Approximately 160 ms. |
*b | Approximately 270 ms. |
|
Item | Content |
|---|---|
|
Tester Connection | I67-10 (EFII) - I67-12 (GND) |
|
Tool Setting | 2 V/DIV., 500 ms./DIV. |
|
Condition | Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
(4) Waveform 4 (Reference)
|
*a | Approximately 160 ms. |
*b | Approximately 270 ms. |
|
Item | Content |
|---|---|
|
Tester Connection | I67-11 (EFIO) - I67-12 (GND) |
|
Tool Setting | 2 V/DIV., 500 ms./DIV. |
|
Condition | Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
CHECK ECM
(a) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
Related Data List Item / DTC |
|---|---|---|---|---|
|
A47-25 (IMO) - A47-10 (E1) |
Transponder key ECU assembly communication output |
Ignition switch off | 11 to 14 V |
- |
| Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
Pulse generation (See waveform 1) |
- | ||
|
A47-26 (IMI) - A47-10 (E1) |
Transponder key ECU assembly communication input |
Ignition switch off | Below 1 V |
- |
| Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
Pulse generation (See waveform 2) |
- |
(b) Using an oscilloscope, check the waveform.
(1) Waveform 1 (Reference)
|
*a | Approximately 160 ms. |
*b | Approximately 270 ms. |
|
Item | Content |
|---|---|
|
Tester Connection | A47-25 (IMO) - A47-10 (E1) |
|
Tool Setting | 2 V/DIV., 500 ms./DIV. |
|
Condition | Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
(2) Waveform 2 (Reference)
|
*a | Approximately 160 ms. |
*b | Approximately 270 ms. |
|
Item | Content |
|---|---|
|
Tester Connection | A47-26 (IMI) - A47-10 (E1) |
|
Tool Setting | 2 V/DIV., 500 ms./DIV. |
|
Condition | Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) auxiliary battery terminal |
READ NEXT:
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) The transponder key ECU assembly controls the immobiliser system. Immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST 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 a
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Immobiliser System (w/o Smart Key System)
DTC No. Detection Item
Link B2780
Push Switch / Key Unlock Warning Switch Malfunction
B2
SEE MORE:
Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground (P045011,P045015,P04502F)
DTC SUMMARY
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Note
P045011 Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground
EVAP pressure is less than 42.110 kPa(abs) [6.106 psi(abs)] for 0.5 seconds or more.
Ca
Inspection
INSPECTION PROCEDURE 1. INSPECT BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY (w/o Power Back Door)
(a) Check the operation of the door lock motor.
(1) Move the back door lock with courtesy light switch assembly to the lock position.
*a Unlock
