Toyota 1993 MR2 Wiring Diagrams page 72

ENGINE CONTROL (5S–FE)
SERVICE HINTS
PCME (ENGINE ECU (M/T) OR ENGINE AND ECT ECU (A/T))
E 6, E 7, E 8
VOLTAGE AT PCME (ECU) WIRING CONNECTORS
BATT –E1 : ALWAYS 9.0–14.0 VOLTS
+B –E1 : 9.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1 –E1 : 9.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL –E2 : 9.0–14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
VC –E2 : 4.5–5.5 VOLTS (IGNITION SW AT ON POSITION)
VTA –E2 : 0.3–0.8 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
: 3.2–4.9 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PIM –E2 : 3.3–3.9 VOLTS (IGNITION SW AT ON POSITION)
#10, #20 – E01, E02 : 9.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
THA –E2 : 0.5–3.4 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, 68°F)
THW –E2 : 0.2–1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, 176°F)
STA –E1 : 6.0–14.0 VOLTS (ENGINE CRANKING)
IGT –E1 : 0.8–1.2 VOLTS (ENGINE CRANKING OR IDLING)
W –E1 : 9.0–14.0 VOLTS (NO TROUBLE AND ENGINE RUNNING)
ACT –E1 : 4.5–5.5 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACA –E1 : 0–3.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ISCC, ISCO–E1 : 9.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
TE1 –E1 : 9.0–14.0 VOLTS (IGNITION SW ON AND DLC (CHECK CONNECTOR) TE1–E1 NOT CONNECTED)
0–3.0 VOLTS (IGNITION SW ON AND DLC (CHECK CONNECTOR) TE1–E1 CONNECTED)
NSW –E1 : 0–3.0 VOLTS (IGNITION SW ON AND PNS (NEUTRAL START SW) POSITION P OR N RANGE)
9.0–14.0 VOLTS (IGNITION SW ON AND PNS (NEUTRAL START SW) EX. POSITION P OR N RANGE)
RESISTANCE AT PCME (ECU) WIRING CONNECTORS
(DISCONNECT WIRING CONNECTOR)
IDL –E2 : INFINITY (THROTTLE VALVE OPEN)
2.3 KK OR LESS (THROTTLE VALVE FULLY CLOSED)
VTA –E2 : 3.3–10.0 KK (THROTTLE VALVE FULLY OPEN)
0.2–0.8 KK (THROTTLE VALVE FULLY CLOSED)
VC –E2 : 3.0–7.0 KK
THA –E2 : 2.0–3.0 KK (INTAKE AIR TEMP. 20°C, 68°F)
THW –E2 : 0.2–0.4 KK (COOLANT TEMP. 80°C, 176°F)
G+ – G– : 0.17–0.21 KK
19.3–22.3 K
ISCC, ISCO–+B, +B1:
: PARTS LOCATION
CODE SEE PAGE
A 9 26
A14 26
C 1 24 (5S–FE)
C 9 26
C10 C 26
C11 A 26
C12 B 26
D 1 24 (5S–FE)
D 2 26
E 3 24 (5S–FE)
E 4 24 (5S–FE)
A 24 (5S–FE)
E 6 E 6
B 24 (5S–FE)
: RELAY BLOCKS
CODE SEE PAGE
1 20
2 21
5 21
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
3A
3C 22
3D
76
CODE
C
E 7 E 7
F
D
E 8 E 8
E
F 4
I 1
I 3
I 4
I 5
I 6
I 7
I 8
I11
RELAY BLOCKS (RELAY BLOCK LOCATION)
R/B NO. 1 (LEFT KICK PANEL)
R/B NO. 2 (ENGINE COMPARTMENT LEFT)
R/B NO. 5 (FRONT LUGGAGE COMPARTMENT RIGHT)
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER) (
SEE PAGE
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
26
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
24 (5S–FE)
26
)
CODE SEE PAGE
J 1 26
J 3 26
K 1 24 (5S–FE)
N 1 24 (5S–FE)
O 1 24 (5S–FE)
O 2 24 (5S–FE)
P 7 27
A 24 (5S–FE)
T 2 T 2
B 24 (5S–FE)
V 1 24 (5S–FE)
V 2 24 (5S–FE)
V 3 24 (5S–FE)
V 4 24 (5S–FE)