Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU).
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|
*1 | Power Distribution Box Assembly |
*2 | Main Body ECU (Multiplex Network Body ECU) |
(b) Reconnect the power distribution box assembly connectors.
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(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-26 (BECU) - Body ground |
Auxiliary battery power supply |
Ignition switch off | 11 to 14 V |
|
MB-27 (IGR) - Body ground |
IG power supply | Ignition switch off |
Below 1 V |
|
Ignition switch ON | 11 to 14 V |
(d) Install the main body ECU (multiplex network body ECU).
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(e) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
8B-2 - Body ground |
Mirror heater drive signal |
Ignition switch ON, rear window defogger switch off |
Below 1 V |
|
Ignition switch ON, rear window defogger switch on |
11 to 14 V |
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
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AIR CONDITIONING CONTROL ASSEMBLY
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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
Mirror Heater does not Operate with Rear Defogger Switch
DESCRIPTION When the mirror heater switch (rear window defogger switch) is operated, the RR DEF relay drive request signal is sent to the air conditioning amplifier assembly and then to main body ECU
SEE MORE:
Key Cannot be Registered
DESCRIPTION A maximum of 5 key ID codes can be registered. WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE: If the transponder key ECU assembly is replaced, refer to Registration.
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1.
CHECK REGISTRATION MODE (a) Check that the system enters registration mode.
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 DRAIN ENGINE COOLANT
- -
- 2
ECM 89661
- -
- 3
AUXILIARY BATTERY -
- -
- 4
AUXILIARY BATTERY CLA
