Resistance Of Ecu Wiring Connectors; C/Opn Relay; Efi Main Relay; E1 Engine Coolant Temp. Sensor - Toyota MR2 2000 Manual

ENGINE CONTROL
SERVICE HINTS
E2 (A), E3 (B), E4 (C), E5 (D) ENGINE CONTROL MODULE
BATT–E1 : Always 9.0–14.0 volts
+B–E1 : 9.0–14.0 volts (Ignition SW at ON position)
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)
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)
W–E1 : 9.0–14.0 volts (No trouble and engine running)
STP–E1 : 9.0–14.0 volts (Brake pedal depress)
RSO–E1 : 9.0–14.0 volts (Ignition SW at ON position)
IGT1, IGT2, IGT3, IGT4–E1 : 0.8–1.2 volts (Engine cranking or idling)
#10, #20, #30, #40–E01, E02 : 9.0–14.0 volts (Ignition SW at ON position)

RESISTANCE OF ECU WIRING CONNECTORS

(Disconnect wiring connector)
VTA–E2 : 3.3–10.0 kΩ (Throttle valve fully open)
0.2–5.5 kΩ (Throttle valve fully closed)
VC–E2 : 2.0–7.0 kΩ
THA–E2 : 2.0–3.0 kΩ (Intake air temp. 20°C, 68°F)
THW–E2 : 0.2–0.4 kΩ (Coolant temp. 80°C, 176°F)
RSO–E1 : 19.3–22.3 Ω

C/OPN RELAY

5–3 : Closed with the starter cranking and engine running

EFI MAIN RELAY

3–5 : Closed with the ignition SW at ON or ST position

E1 ENGINE COOLANT TEMP. SENSOR

1–2 : 10.0–20.0 kΩ (–20°C, –4°F)
4.0–7.0 k Ω (0°C, 32°F)
2.0–3.0 kΩ (20°C, 68°F)
0.9–1.3 kΩ (40°C, 104°F)
0.4–0.7 kΩ (60°C, 140°F)
0.2–0.4 kΩ (80°C, 176°F)
: PARTS LOCATION
Code See Page
A7 32
C1 30
C2 30
C3 30
C5 32
C9 32
C10 A 32
C11 B 32
C12 C 32
D1 32
E1 30
E2 A 34
E3 B 34
E4 C 34
E5 D 34
64
Code See Page
F12 34
G1 30
H1 30
H2 30
H3 30
I1 30
I2 30
I3 30
I4 30
I5 30
I6 30
I7 30
I8 30
I9 30
I10 33
2000 MR2 (EWD408U)
Code See Page
J3 A 33
J4 B 33
J5 35
K1 31
M1 31
N1 31
O1 31
S5 A 33
S6 B 33
S7 33
T1 31
V1 31
V2 31
V3 35
V4 35