Toyota AVENSIS 2000 Supplement Manual page 331

DI–200
DTC C1203 / 59
CIRCUIT DESCRIPTION
The circuit is used to send TRAC & VSC control information from the ABS & BA & TRC & VSC ECU to the
Engine and ECT ECU (A/T) or Engine ECU (M/T) (TRC+, TRC–), and engine control information from the
Engine and ECT ECU (A/T) or Engine ECU (M/T) to the ABS & BA & TRC & VSC ECU (ENG+, ENG–).
DTC No.
When any of the following 1. through 3. is detected :
1. IG1 voltage is 8.5 V or more, and the condition that data
can not be sent to Engine ECU (M/T) or Engine and
ECT ECU (A/T) continues for 1.2 sec. or more.
2. IG1 voltage is 8.5 V or more, engine speed is 500 r.p.m
or more, vehicle speed is 60 km/h (38 mph) or more,
53 and the condition that data can not be received from
Engine ECU (M/T) or Engine and ECT ECU (A/T) con-
tinues for 5 sec. or more.
3. The condition that data can not be transmitted between
the ABS & BA & TRC & VSC ECU and Engine ECU
(M/T) or Engine and ECT ECU (A/T) occurs at least
once within 5 sec. continues 10 consecutive times.
WIRING DIAGRAM
Engine ECU (M/T)
Engine and ECT ECU (A/T)
AVENSIS/CORONA SUP (RM781E)
DIAGNOSTICS
EFI Communication Circuit
Malfunction
DTC Detecting Condition
12
B
TRC–
E15
17
Y
TRC+
E15
21
ENG– E14
22
ENG+
E14
– ABS WITH EBD & BA & TRC & VSC SYSTEM
S TRC+ or TRC– circuit
S ENG+ or ENG– circuit
S Engine ECU (M/T) or Engine and ECT ECU (A/T)
S ABS & BA & TRC & VSC ECU
21 21
B
IE2 IF2
(RHD) (LHD)
22 22
Y
IE2 IF2
(RHD) (LHD)
L
R
Trouble Area
ABS & BA & TRC &
VSC ECU
19
A29
TRC–
18
A29
TRC+
7
A29
ENG–
8
A29
ENG+
DI7ZP–01
F13407