Multiplex Communication System
TERMINALS OF ECUTerminals Of ECU:
1. INSPECT INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU)
a. Disconnect the B5 ECU, 1D, 1E, 1F, 1M and 1R J/B connectors.
Pinouts:
b. Check the voltage and resistance between each terminal of the wire harness side connectors.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
2. CHECK INTEGRATION SWITCH (w/o LEXUS NAVIGATION SYSTEM)
a. Disconnect the C4 switch connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
3. CHECK NETWORK GATEWAY ECU (w/ LEXUS NAVIGATION SYSTEM)
a. Disconnect the G3 ECU connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
4. CHECK ECM
a. Disconnect the E5, E6 and E7 ECM connectors.
Pinouts Part 1:
Pinouts Part 2:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
5. CHECK TRANSPONDER KEY ECU ASSY
a. Disconnect the T9 ECU connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
6. CHECK MULTIPLEX TILT & TELESCOPIC ECU
a. Disconnect the T4 ECU connector.
Pinouts Part 1:
Pinouts Part 2:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
7. CHECK A/C AMPLIFIER (A/C ECU)
a. Disconnect the A8 amplifier connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
8. CHECK OUTER MIRROR CONTROL ECU ASSY (PASSENGER SIDE)
a. Disconnect the R22 ECU connector.
Pinouts Part 1:
Pinouts Part 2:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
9. CHECK OUTER MIRROR CONTROL ECU ASSY (DRIVER SIDE)
a. Disconnect the R21 ECU connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
10. CHECK WINDSHIELD WIPER RELAY ASSY (WIPER ECU)
a. Disconnect the A28 relay connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
11. CHECK TELEPHONE ECU
a. Disconnect the M8 and M9 ECU connectors.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
12. CHECK POSITION CONTROL ECU & SWITCH (POWER SEAT ECU)
a. Disconnect the P32 and P33 ECU connectors.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
13. CHECK MULTIPLEX NETWORK DOOR ECU BACK (BACK DOOR ECU)
a. Disconnect the P13 and P14 ECU connectors.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
14. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY
a. Disconnect the P22 switch connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
15. CHECK COMBINATION METER ASSY
a. Disconnect the C8 and C9 meter connectors.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
16. CHECK AIRBAG SENSOR ASSY (AIRBAG ECU)
a. Disconnect the A20 sensor connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
17. CHECK SLIDING ROOF DRIVE GEAR ASSY (SLIDING ROOF ECU (STANDARD TYPE))
a. Disconnect the M12 gear connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
18. CHECK SLIDING ROOF DRIVE GEAR ASSY (SLIDING ROOF ECU (MULTI-PANEL MOON ROOF TYPE))
a. Disconnect the M12 ECU connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
19. CHECK RAIN SENSOR
a. Disconnect the R7 sensor connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.
Terminals Of ECU:
20. CHECK HEADLAMP SWIVEL ECU (AFS ECU)
a. Disconnect the A14 ECU connector.
Pinouts:
b. Check the voltage and resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.