Toyota Sienna Service Manual: MPX Body ECU Stop
DTC B1200 MPX Body ECU Stop
DESCRIPTION
This DTC is detected when communication between the multiplex network body ECU and the multiplex network gateway ECU stops for more than 10 seconds.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
B1200 |
Body ECU communication stops |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - BATTERY)
- Disconnect the 1A and 1C junction block connectors.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - GROUND)
- Disconnect the 1K and 1L junction connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK COMMUNICATION LINE
- Disconnect the A21, G4 and B7 ECU connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Result
REPLACE MULTIPLEX NETWORK BODY ECU
Diagnostic trouble code chart
If a malfunction code is displayed during the DTC check,
check the circuit listed for that code in the chart below
(Proceed to the page given for that circuit).
MULTIPLEX COMMUNICATION SYSTEM
...
Passenger Side Outer Mirror ECU
DTC B1208 Passenger Side Outer Mirror ECU
DESCRIPTION
This DTC is detected when communication between the outer mirror control ECU
RH and multiplex
network gateway ECU stops for more than 10 seco ...
Other materials:
Removal
1. DISCHARGE FUEL SYSTEM PRESSURE
HINT:
See page FU-1.
2. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
3. REMOVE NO. 1 ENGINE UNDER COVER
4. DRAIN ENGINE COOLANT (See page CO-6)
5. REMOVE FRONT WIPER ARM HEAD CAP (See page
WW-4)
6. REMOVE FRONT WIPER ARM RH (See page WW-4)
7. REMOVE FRO ...
EVAP System
RELATED DTCS
If any EVAP system DTCs are set, the malfunctioning area can be determined
using the table below.
NOTICE:
If the 0.02 inch reference pressure difference between the first and
second checks is greater than
the specification, the DTCs corresponding to the refe ...
Inspection
1. INSPECT CHARCOAL CANISTER ASSEMBLY
(a) Visually check the charcoal canister for cracks or
damage.
If cracks or damage are found, replace the charcoal
canister assembly.
(b) Check charcoal canister operation.
(1) With the purge port closed, blow 1.67 kPa (17.0
gf/cm2, 0.24 psi) ...
