Efi Main Relay - Toyota ST185 Series Repair Manual

ENGINE CONTROL
SERVICE HINTS

EFI MAIN RELAY

4–2 : CLOSED WITH IGNITION SW AT ON OR ST POSITION
EFI RESISTOR
E 1
2–1, 3, 4, 5 : 5–7 Ω
INJECTOR
I 4, I 5, I 6, I 7
1–2 : 2–4 Ω
FUEL PUMP RESISTOR
F10
APPROX. 73 Ω
1–2:
AIR FLOW METER
A15
1–2 : CLOSED WITH STARTER RUNNING OR MEASURING PLATE OPEN
5–6 : 200–600 Ω (MEASURING PLATE CLOSED)
20–1000 Ω (MEASURING PLATE OPEN)
5–4 : 200–400 Ω
5–7 : 10–20 KW (–20°C, –4°F)
4–7 KΩ (0°C, 32°F)
2–3 KΩ (20°C, 68°F)
0.9–1.3 KΩ (40°C, 104°F)
0.4–0.7 KΩ (60°C, 140°F)
EFI WATER TEMP. SENSOR
E 2
1–2: 10–20 KΩ (–20°C, –4°F)
4–7 KΩ (0°C, 32°F)
2–7 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)
THROTTLE POSITION SENSOR
T 1
2–4: 0.2–0.8 KΩ WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0 MM (0 IN)
3–4: LESS THAN 2.3 KΩ WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.50 MM (0.020 IN)
1 Ω WITH 0.7 MM (0.028 IN.)
2–4: 3.3–10 KΩ WITH THROTTLE VALVE FULLY OPEN
1–4: 3–8 KΩ
ENGINE ECU
E 4, E 5, E 6
VOLTAGE AT ECU CONNECTORS
BATT–E1
+B, +B1–E1
IDL–E2
VTA–E2
VC–E2
VS–E2
THA1–E2
THW–E2
STA–E1
#1, #2, #3, #4 – E01, E02
IGT–E1
TVIS–E1
T–E1
A/C1–E1
RSO, RSC –E1
PIM–E2
W–E1
RESISTANCE AT ECU CONNECTORS
(DISCONNECT WIRING CONNECTOR FROM ECU)
IDL–E1
VTA–E2
VS–E2
THA1–E2
THW–E2
G1,G2–G–
NE–G–
RSC, RSO–+B, +B1
60
: 10–14 VOLTS
: 10–14 VOLTS (IGNITION SW ON)
: 4–6 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
: 0.1–1.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
3–6 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
: 4–6 VOLTS (IGNITION SW ON)
: 4–6 VOLTS (IGNITION SW ON AND MEASURING PLATE FULLY CLOSED)
1.0 VOLTS OR LESS (IGNITION SW ON AND MEASURING PLATE FULLY OPEN)
2.0–4.0 VOLTS (IDLING)
1.0–2.0 VOLTS (3000 RPM)
: 1.0–3.0 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, (68°F))
: 0.1–1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, (176°F))
: 6–14 VOLTS (CRANKING)
: 10–14 VOLTS (IGNITION SW ON)
: 0.7–1.0 VOLTS (CRANKING OR IDLING)
: 2.0 VOLTS OR LESS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
10–14 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE OPEN
2.0 VOLTS OR LESS IDLING
10–14 VOLTS WITH 4200 RPM OR MORE
: 10–14 VOLTS WITH IGNITION SW ON AND CHECK CONNECTOR T–E1 NO CONNECT
0.5 VOLTS OR LESS WITH IGNITION SW ON AND CHECK CONNECTOR T–E1 CONNECT
: 8–14 VOLTS WITH IGNITION SW ON A/C SWITCH ON
: 9–14 VOLTS (IGNITION SW ON)
: 2.5–4.5 VOLTS (IGNITION SW ON)
: 10–14 VOLTS (NO TROUBLE (CHECK ENGINE WARNING LIGHT OFF) AND ENGINE RUNNING)
: INFINITY (THROTTLE VALVE OPEN)
LESS THAN 2300 Ω (THROTTLE VALVE FULLY CLOSED)
: 3300–10000 Ω (THROTTLE VALVE OPEN)
200–800 Ω (THROTTLE VALVE FULLY CLOSED)
: 200–600 Ω (MEASURING PLATE FULLY CLOSED)
20–1200 Ω (MEASURING PLATE FULLY OPEN)
: 2000–3000 Ω (INTAKE AIR TEMP. 20°C, 68°F)
: 200–400 Ω (COOLANT TEMP. 80°C, 176°F)
: 140–180 Ω
: 180–220 Ω
: 17.7–23.9 Ω