Multiplex Communication System
TERMINALS OF ECU1. MULTIPLEX NETWORK BODY ECU
a. Check the body ECU.
Terminals Of ECU/Pinouts - Multiplex Network Body ECU:
1. Disconnect the body ECU connectors B9 and B12.
2. Check the voltage or continuity of each terminal of the vehicle's side connectors.
HINT: If the value is not as specified, the vehicle's side may be defective.
2. POWER WINDOW REGULATOR MASTER SWITCH ASSY (DOOR ECU)
a. Check the master switch.
1. Disconnect the master switch connector.
2. Check the voltage or continuity of each terminal of the vehicle's side connector.
HINT: If the value is not as specified, the vehicle's side may be defective.
3. COMBINATION METER ASSY (METER ECU)
a. Check the meter.
Terminals Of ECU/pinouts - Combination Meter Assy:
1. Disconnect the meter connector C11.
2. Check the voltage or continuity of each terminal of the vehicle's side connector.
HINT: If the value is not as specified, the vehicle's side may be defective.
4. AIR CONDITIONER AMPLIFIER ASSY (A/C ECU)
a. Check the air conditioner amplifier.
Terminals Of ECU/pinouts - Air Combinationer Amplifier Assy (A/C ECU):
1. Disconnect the air conditioner amplifier connector A10.
2. Check the voltage or continuity of each terminal of the vehicle's side connector.
HINT: If the value is not as specified, the vehicle's side may be defective.
5. THEFT WARNING ECU ASSY (THEFT DETERRENT ECU)
a. Check the theft warning ECU.
Terminals Of ECU/pinouts - Theft Deterrent ECU Assy (Theft Deterrent ECU):
1. Disconnect the connector.
2. Check the voltage or continuity of each terminal of the vehicle's side connector.
6. ECM
a. Inspect the ECM operation.
Terminals Of ECU/pinouts - ECM:
1. Check the voltage or continuity of each terminal of the vehicle's side connectors.
NOTE:
- The inspection should be started from the back side of the connector with the ECM connector being connected.
- Before the measurement, check the power source voltage (10 - 14 V when IG ON) and body ground (5 ohm or less between each ground terminal and the engine body, when IG OFF).
7. SLIDING ROOF DRIVE GEAR SUB-ASSY (SLIDING ROOF ECU)
a. Check the sliding roof ECU.
Terminals Of ECU/pinouts - Solid Roof Drive Gear Sub-Assy (Sliding Roof ECU):
1. Disconnect the sliding roof ECU connector.
2. Check the voltage or continuity between each terminal of the vehicle's side connectors.