When installing the main body ECU (multiplex network body ECU), always replace it with a new one.
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
1.INSTALL MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Hold the main body ECU (multiplex network body ECU) with your dominant hand.
| *a | Connector |
Do not touch the connector.
Make sure foreign matter does not enter the terminals.
| *a | Fitting Surface |
Hold the instrument panel junction block assembly with your other hand.
Make sure there is no foreign matter in the fitting surface.
| *a | 20° or more |
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Install in this Direction |
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Housing Sidewall |
Set the guide of the main body ECU (multiplex network body ECU) against the housing sidewall.
Make sure the angle between the instrument panel junction block assembly and the main body ECU (multiplex network body ECU) is 20° or more.
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Install in this Direction |
|
Housing Sidewall |
Slide the guide of the main body ECU (multiplex network body ECU) along the housing sidewall in the direction indicated by the arrow.
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Install in this Direction |
|
Side A |
Slide it until it contacts side A.
|
Install in this Direction |
Contact side A.
Do not contact side A with the main body ECU (multiplex network body ECU) too hard.
| *a | Center of Rotation (Contacts Surface A) |
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Rotate in this Direction |
| *a | Center of Rotation (Contacts Surface A) |
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Rotate in this Direction |
While pressing the main body ECU (multiplex network body ECU) against side A (center of rotation) of the instrument panel junction block assembly, rotate it until it enters the lock of the instrument panel junction block assembly.
The center of rotation is the one that contacts surface A.
Rotate it until it enters the lock of the instrument panel junction block assembly.
| *a | Before Locking | *b | Main Body ECU (Multiplex Network Body ECU) Lock |
| *c | Instrument Panel Junction Block Assembly Lock | - | - |
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Install in this Direction |
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Pressing Area |
Press the pressing area of the main body ECU (multiplex network body ECU).
Press it in one of the following ways.
| *a | Press the 2 sides of the main body ECU (multiplex network body ECU) with both hands. | *b | Press the center of the main body ECU (multiplex network body ECU) with one hand. |
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Place fingers or the palm of your hand here | - | - |
Do not hit on or put your weight on the main body ECU (multiplex network body ECU) when engaging the main body ECU (multiplex network body ECU).
Check the engagement of the main body ECU (multiplex network body ECU) and the instrument panel junction block assembly by the locking sound.
| *a | Back Side of Main Body ECU (Multiplex Network Body ECU) |
| *b | Rib Surrounding Instrument Panel Junction Block Assembly |
Check that the back side of the main body ECU (multiplex network body ECU) and the rib surrounding the instrument panel junction block assembly are the same height.
| *a | After Locking (Height Matches) | *b | Back Side of Main Body ECU (Multiplex Network Body ECU) |
| *c | Rib Surrounding Instrument Panel Junction Block Assembly | - | - |
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Confirm Visually | - | - |
2.INSTALL DRIVER SIDE JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU
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Rotate in this Direction |
Attach the claw to connect the 2 lever connectors.
Be sure to connect the connector securely.
Attach the claw and install the instrument panel junction block assembly with main body ECU to the connector holder.
Align the guide and install the instrument panel junction block assembly with main body ECU together with the connector holder.
Install the nut.
Connect the 3 connectors.
| *a | Lever connector |
|
Rotate in this Direction |
Connect the 2 connectors.
Attach the claw to connect the 2 lever connectors.
Be sure to connect the connector securely.
Connect the 5 connectors.
w/ PTC heater:
Connect the 3 connectors.
for Automatic Air Conditioning System:
Attach the wire harness clamp.
Connect the connector.
for Manual Air Conditioning System:
Attach the wire harness clamp.
Connect the connector.
Attach the wire harness clamp.
Connect the connector.
89661
3.INSTALL ECM
4.CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
5. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
6. PERFORM DIAGNOSTIC SYSTEM CHECK
7.CHECK SRS WARNING LIGHT