Toyota ZZT230 series Repair Manual page 346

DTC
CIRCUIT DESCRIPTION
ECM recei v es t h e oper a t i n g condi t i o n { O N/OFF) of NC f r om NC ECU
i n f o rmati o n f r om t h e body ECU.
ECM uses
these
DTC No.
Condition (a)
(a) No comm u nication from body ECU
P1645
(b)
INSPECTION PROCEDURE
HI N T:
Read f r e eze f r a me dat a usi n g TOYOTA hand-hel d t e st e r or
t h e engi n e condi t i o ns when t h e ma
whet h er the vehi c l e was runni n g or st o pped, the engi n e warmed up or not , the ai r - fuel r
at the
of t h e mal f u nct i o n.
time
Perf o r m t r oubl e shoot i n g t h e Mul t i p l e x Communi c at i o n
)
)
DIAGNOSTICS
P1645 Body ECU Malfunction
I n for m at i o n t o cont r ol t h e engi n e { i d l e up, et c . ) .
Ot
(b) continues
DTC Oaleellng Condition
for 3.0 sec.
commooication !rom AJC ECU
No
n
l f u c
ENGINE
• Body ECU
•NC ECU
• Communication
OBD
t i o n
is detected, when troubleshooting it is useful for determining
System (See
i t
and also receives the electrical load
Trouble Area
bus
I I t o ol .
scan Because freeze frame records
o
t
a i
page
Dl-600).
Dl-135
or
lean rich, etc.