Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY
(a) Disconnect the I55 and I253 radio and display receiver assembly connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I55-15 (IG) - Body ground |
Power source (IG) |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
||
|
I55-16 (ACC1) - Body ground |
Power source (ACC) |
Ignition switch off |
Below 1 V |
|
Ignition switch ACC |
10.5 to 16 V |
||
|
I55-4 (+B1) - Body ground |
Power source (+B) |
Ignition switch off |
10.5 to 16 V |
|
I55-1 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the I55 and I253 radio and display receiver assembly connectors.
(d) Measure the voltage and check for waveform according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I55-5 (REV) - Body ground |
Reverse signal |
Ignition switch ON, shift lever in R |
11 to 14 V |
|
Ignition switch ON, shift lever not in R |
Below 1 V |
||
|
I253-28 (V+) - I253-29 (V-) |
Display signal |
Ignition switch ON, shift lever in R |
Pulse generation (See waveform 1) |
|
Ignition switch ON, shift lever in R, screen blacked out by covering camera lens |
Pulse generation (See waveform 2) |
||
|
I253-30 (CA+) - I253-27 (CGND) |
Power source |
Ignition switch ACC |
5.5 to 7.05 V |
|
I253-27 (CGND) - Body ground |
Camera ground |
Always |
Below 1 Ω |
|
I253-26 (CSLD) - Body ground |
Shield ground |
Always |
Below 1 Ω |
(e) Using an oscilloscope, check waveform 1.
Measurement Condition
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
I253-28 (V+) - I253-29 (V-) |
|
Tool Setting |
200 mV/DIV., 50 μsec./DIV. |
|
Condition |
Ignition switch ON, shift lever in R |
(f) Using an oscilloscope, check waveform 2.
Measurement Condition
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
I253-28 (V+) - I253-29 (V-) |
|
Tool Setting |
200 mV/DIV., 50 μsec./DIV. |
|
Condition |
Ignition switch ON, shift lever in R, screen blacked out by covering camera lens |
READ NEXT:
Image from Camera for Rear View Monitor is Abnormal
DESCRIPTION
The display signal from the rear television camera assembly
is transmitted to the radio and display receiver assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When repla
Television Camera
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
BACK DOOR OUTSIDE GARNISH SU
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Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE FUNCTION
(a) When a malfunction occurs in the tire pressure warning system, the tire pressure
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system failure.
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