Toyota CH-R Service Manual: Power Source Circuit
DESCRIPTION
Based on changes in the power source voltage, the main body ECU (multiplex network body ECU) can detect if the battery has been disconnected and reconnected.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Before replacing the main body ECU (multiplex network body ECU), refer
to REGISTRATION*1.
Click here
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*1: w/ Smart Key System
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (POWER SUPPLY) |
(a) Disconnect the 3F instrument panel junction block assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3F-1 - Body ground |
Always |
11 to 14 V |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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|
2. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the main body ECU (multiplex network body ECU).
Click here
|
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3F-1 - MB-31 (BECU) |
Always |
Below 1 Ω |
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
Improper Operation
DESCRIPTION
When the theft deterrent system operates by itself, it could be due to something
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hood causing a signal ...
Unlock Warning Switch Circuit
DESCRIPTION
The key unlock warning switch assembly comes on when the ignition key is inserted
into the ignition key cylinder and goes off when the ignition key is removed.
WIRING DIAGRAM
PROCED ...
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Toyota CH-R Service Manual > Steering Lock System: Power Source Control ECU Malfunction (B2782)
DESCRIPTION
The certification ECU (smart key ECU assembly) has a power source mode switching
function.
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signal) sent directly from the certification ECU (smart key ECU assembly) to the
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Toyota CH-R Service Manual > Tire Pressure Warning System: Initialization not Completed (C2177/77)
DESCRIPTION
Initialization is necessary if one of the following occurs:
The tire pressure warning ECU and receiver is replaced.
A tire pressure warning valve and transmitter is replaced.
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The tires are rotated.
A new ...
Toyota CH-R Owners Manual
- For safety and security
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Toyota CH-R Service Manual
- Introduction
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- Audio / Video
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- Theft Deterrent / Keyless Entry
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