1992 Toyota Previa Electrical Supplement

G

~··

¥'-' ENGINE CONTROL

SERVICE HINTS

E 7.E I.E 9 ENGINE ECU

VOLTAGE AT ECU WIRING CONNECTORS

BATT -EI :ALWAYS 10-14VOLTS

+B. +BI -EI: 10.0-U.OVOLTS (IGNITION

IDL -E2: 1.0-14.0VOLTS (IGNITION

VC -E2: 4.0-6.0VOLTS (IGNITION

VTA -E2: 0.1-1.0VOLTS (IGNITION

3.0-5.0VOLTS (IGNITION

VS -E2: 3.7-4.3VOLTS (IGNITION

0.2-0.5VOLTS (IGNITION

2.3-2.IVOLTS (IDLING)

0.3-I.OVOLTS (3000RPM)

SW ON)

SW ON AND

SW ON)

SW ON AND

SW ON AND

SW ON AND

SW ON AND

#10.#20 -EOI.E02:10-14VOLTS (IGNITION SW ON)

THROTTLE VALVE OPEN)

THROTTLE VALVE FULLY CLOSED)

THROTTLE VALVE OPEN)

MEASURING PLATE FULLY CLOSED)

MEASURING PLATE OPEN)

THA -E2: 1.0-3.0VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20'C (61'F))

THV -E2: 0.1-I.OVOLTS (IGNITION SW ON AND COOLANT TEMP. 10'C (176'F))

STA -EI: 6.0-12.0VOLTS (IGNITION SW AT ST POSITION)

IGT -EI: 0.7-I.OVOLTS (CRANKING OR IDLING)

V -EI: 1.0-14.0VOLTS (NO TROUBLE (CHECK ENGINE LIGHT OFF) AND ENGINE RUNNING)

ISCI.ISC2 - EI :1-14VOLTS (IGNITION SW ON)

RESISTANCE AT ECU CONNECTORS

(DISCONNECT WIRING CONNECTORS)

IDL -E2:LESS THAN lOOn (THROTTLE VALVE FULLY CLOSED)

INFINITY (THROTTLE VALVE OPEN)

VTA -E2:0.2-O.IKn (THROTTLE VALVE FULLY CLOSED)

3.3-10.OKo (THROTTLE VALVE OPEN)

THA -E2:2.0-3.0Ko (INTAKE AIR TEMP. 20'C (6I'F))

THV -E2:0.2-0.4Ko (COOLANt TEMP. 10'C (176'F))

+B -EI :0.2-0.4Ko

VS -E2:20- 1000 (MEASURING PLATE FULLY CLOSED)

20-10000 (MEASURING PLATE OPEN)

() I PARTS LOCATION

CODE SEE PAGE CODE

AI2 20 E 9 I

C 2 22 F I

C 5 (^22) F 9 I
C 6 A (^22) FlO I
C 7 B 22 I I
C I C 22 I 2
CU 22 I 3
D I 20. I 4
E 3 20 I 5
E 4 20 I^6
E 5 20 I 7
E 6 22 I 8
E 7 A^22 J I
E I B 22 J 2
<:) I RELAY BLOCKS
C
A
B
22
20
20
20
20
20
20
20
20
20
2J
23
23
23
RELAY BLOCKS (RELAY BLOCK LOCATION)
R/B NO.1 (INSTRUMENT PANEL CENTER)
SEE PAGE
•• C:>.. I JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
COWL WIRE AND J/B NO.1 (INSTRUMENT PANEL CENTER)
c:J I CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IHI 26 ENGINE NO.1 WIRE AND COWL WIRE (UNDER THE DRIVER'S SEAT)
IH2
~ I GROUND POINTS
CODE SEE PAGE GROUND POINTS LOCATION
EA 24 FRONT RIGHT FENDER
EB 24 FRONT LEFT FENDER
EC 24 INTAKE MANIFOLD
ID^26 LEFT SIDE OF INSTRUMENT PANEL REINFORCEMENT
IE^26 RIGHT SIDE OF INSTRUMENT PANEL REINFORCEMENT
S 9
SII
SI5
CODE SEE PAGE
J 4 23
K I 20
N I 20
o 2 20
o 3 20
A 23
B 23
A 23
B 23
A 23
B 23
T 2 20
V I 20
V I 20