Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
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CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
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(b) Connect the power distribution box assembly connectors.
(c) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
MB-13 (GND1) - Body ground |
Ground | Always |
Below 1 Ω |
|
MB-14 (GND2) - Body ground |
Ground | Always |
Below 1 Ω |
|
MB-26 (BECU) - Body ground |
Auxiliary battery power supply |
Ignition switch off | 11 to 14 V |
|
MB-27 (IGR) - Body ground |
Ignition power supply |
Ignition switch off | Below 1 Ω |
|
Ignition switch ON | 11 to 14 V |
(d) Install the main body ECU (multiplex network body ECU).
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(e) Connect the power distribution box assembly and main body ECU (multiplex network body ECU) connectors.
(f) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
8E-5 - Body ground |
CXPI communication line |
Ignition switch off | Below 1 V |
|
Ignition switch ON | Pulse generation | ||
|
I85-26 (HEAD) - Body ground |
Light control switch in HEAD position signal input |
Light control switch not in HEAD position |
11 to 14 V |
| Light control switch in HEAD position |
Below 1 V | ||
|
8K-1 - Body ground |
IG power supply | Ignition switch off |
Below 1 V |
| Ignition switch ON |
11 to 14 V | ||
|
8E-6 - Body ground |
Headlight assembly LH power supply |
Ignition switch off | 11 to 14 V |
|
Ignition switch ON | Below 1 V | ||
|
8E-10 - Body ground |
Headlight assembly RH power supply |
Ignition switch off | 11 to 14 V |
|
Ignition switch ON | Below 1 V | ||
|
I85-8 (CLTB) - I85-21 (CLTE) |
Automatic light control sensor power supply output |
Ignition switch off | Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
I85-14 (AHBI) - Body ground |
Auto high beam switch signal input |
Auto high beam switch on |
Below 1 V |
| Auto high beam switch off |
11 to 14 V | ||
|
I85-15 (AHID) - Body ground |
Auto high beam switch indicator drive output |
Ignition switch ON, auto high beam switch off |
11 to 14 V |
| Ignition switch ON, auto high beam switch on |
Below 1 V | ||
|
I85-20 (CLTS) - Body ground |
Automatic light control sensor signal input |
Ignition switch ON | Pulse generation (See waveform 1) |
|
8C-9 - Body ground |
Front door courtesy light switch assembly RH input |
Front door RH open | 4.7 to 5.3 V |
|
Front door RH closed |
Below 1 V |
(1) Waveform 1
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|
Item | Content |
|---|---|
|
Tester Connection | I85-20 (CLTS) - Body ground |
|
Tool setting | 2 V/DIV., 10 ms./DIV. |
|
Condition | Ignition switch ON |
HINT:
The communication waveform changes according to the surrounding brightness.
CHECK COMBINATION METER ASSEMBLY
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CHECK STEERING SENSOR
for HEV Model: Click here
for Gasoline Model: Click here
CHECK FORWARD RECOGNITION CAMERA
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SEMICONDUCTOR POWER INTEGRATION ECU
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READ NEXT:
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 p
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Lighting System
DTC No. Detection Item
Link B124400
Light Sensor Circuit Malfunction
B243900 Headlight LH Circuit
B243
Light Sensor Circuit Malfunction (B124400)
DESCRIPTION The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiple
SEE MORE:
Lost Communication with ECM/PCM "A" Missing Message (U010087,...,U016387)
DESCRIPTION These DTCs are stored when the CAN communication system is malfunctioning.
DTC No. Detection Item
DTC Detection Condition Trouble Area
Memory U010087
Lost Communication with ECM/PCM "A" Missing Message
Diagnosis Condition:
IG voltage 8.5 V or
No Cool Air Comes Out
DESCRIPTION If warm air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.
Symptom Factor
No cool air comes out
(Blower control is normal)
Compressor with pulley assembly mal
