Lexus RX300 (MCU15). Manual — part 368
I19219
Rear Right Door ECU
”R15”
MPX2
Double Lock Control
Relay
I19220
MPX2
”R15”
Passenger Door ECU
Rear Right Door ECU
DI–702
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
LEXUS RX300 (RM785E)
17
Check for short circuit between double lock control relay and rear right door
ECU.
PREPARATION:
(a)
Connect the connector of rear left door ECU.
(b)
Disconnect the connector ”R15” of rear right door ECU.
CHECK:
Check continuity between terminal MPX2 of double lock control
relay and body ground.
OK:
No continuity.
CHECK:
Measure voltage between terminal MPX2 of double lock control
relay and body ground.
OK:
No voltage.
OK
Repair or replace the wireharness between
double lock control relay and rear right door
ECU.
NG
18
Check for short circuit between rear right door ECU and passenger door ECU.
PREPARATION:
(a)
Connect the connector of double lock control relay.
(b)
Disconnect the connector of passenger door ECU.
CHECK:
Check continuity between terminal MPX2 of rear right door ECU
and body ground.
OK:
No continuity.
CHECK:
Measure voltage between terminal MPX2 of rear right door
ECU and body ground.
OK:
No voltage.
OK
Repair or replace the wireharness between rear
right door ECU and passenger door ECU.
NG
I19221
MPX2
Engine & ECT ECU
”E8”
I19222
Body ECU
MPX1
Engine & ECT ECU
”B5”
”E8”
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
DI–703
LEXUS RX300 (RM785E)
19
Check for short circuit between passenger door ECU and engine & ECT ECU.
PREPARATION:
(a)
Connect the connector of rear right door ECU.
(b)
Disconnect the connector ”E8” of engine & ECT ECU.
CHECK:
Check continuity between terminal MPX2 of passenger door
ECU and body ground.
OK:
No continuity.
CHECK:
Measure voltage between terminal MPX2 of passenger door
ECU and body ground.
OK:
No voltage.
OK
Repair or replace the wireharness between en-
gine & ECT ECU and passenger door ECU.
NG
20
Check for short circuit between engine & ECT ECU and body ECU.
PREPARATION:
(a)
Connect the connector of passenger door ECU.
(b)
Disconnect the connector ”B5” of body ECU and sliding
roof ECU.
CHECK:
Check continuity between terminal MPX2 of engine & ECT ECU
and body ground.
OK:
No continuity.
CHECK:
Measure voltage between terminal MPX2 of engine & ECT
ECU and body ground.
OK:
No voltage.
OK
Repair or replace the wireharness between en-
gine & ECT ECU and body ECU.
NG
Replace the body ECU.
DI–704
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
LEXUS RX300 (RM785E)
DTC
B1216 / 16
Rear right door ECU communication
stop
CIRCUIT DESCRIPTION
This DTC is output when communication stops between rear right door ECU and body ECU.
DTC No.
DTC Detecting Condition
Trouble Area
B1216/16
No communication from rear rIght door ECU more than 10
S Rear rIght door ECU
B1216/16
No communication from rear rIght door ECU more than 10
seconds.
Rear rIght door ECU
S Wireharness
WIRING DIAGRAM
See page DI–688
INSPECTION PROCEDURE
1
Check rear right door ECU.
CHECK:
Check if the rear right door window glass auto up.
HINT:
With this inspection rear right door ECU CPU can be diagnosed if it works normal or not.
NG
Replace the rear right door ECU.
OK
DI2B3–07
I19223
Passenger Door
Rear Right Door
MPX1
MPX2
”R15”
Double Lock
Control Relay
Rear Right Door
”R11”
”R15”
MPX2
MPX1
–
DIAGNOSTICS
MULTIPLEX COMMUNICATION SYSTEM
DI–705
LEXUS RX300 (RM785E)
2
Check wireharness.
PREPARATION:
Disconnect connector of passenger door ECU, ”R15” of rear
right door ECU and double lock control relay.
CHECK:
(a)
Check continuity between terminals MPX1 of passenger
door ECU and MPX2 of rear right door ECU.
(b)
Check continuity between terminals MPX1 of rear right
door ECU and MPX2 of double lock control relay.
OK:
If there is OPEN in wireharness of either (a), (b) or (c), please
repair it.
There is a continuity in wireharness of both (a) and (b), or either
(a) or (b).
HINT:
If there is OPEN in wireharness of either (a) or (b), please repair
it.
NG
Repair or replace wireharness.
OK
Replace the rear right door ECU.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст