Toyota AT180 Series Repair Manual page 78

ENGINE CONTROL (4A–FE)
SERVICE HINTS
E 5, E 8 ENGINE ECU
VOLTAGE AT ECU WIRING CONNECTORS
BATT–E1
+B–E1
+B1–E1
IDL–E1
PSW–E1
PIM–E2
VCC–E2
#10, #20–E01, E02
THA–E2
THW–E2
STA–E1
IGT–E1
W–E1
A/C–E1
ACT–E1
T–E1
NSW–E1
V–ISC–E1
RESISTANCE AT ECU WIRING CONNECTORS
(DISCONNECT WIRING CONNECTOR)
IDL–E2
PSW–E2
THA–E1
THW–E1
G1, NE–G–
ISCC–+B
ISCO–+B
: PARTS LOCATION
CODE SEE PAGE
C 1 27 (4A–FE)
C10 28
C12 28
C13 B 28
C14 A 28
E 2 27 (4A–FE)
E 3 27 (4A–FE)
E 5 A 29
E 8 B 29
F10 27 (4A–FE)
: RELAY BLOCKS
CODE SEE PAGE
4 24
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
1A
18 18
1E
1H 18
2A 20
2B
20 20
2C
2D
20 20
2E
3B 22
80
: ALWAYS 10.0–14.0 VOLTS
: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
: 8.0–14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
: 4.0–5.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
: 3.3–3.9 VOLTS (IGNITION SW AT ON POSITION)
: 4.5–5.5 VOLTS (IGNITION SW AT ON POSITION)
: 10.0–14.0 VOLTS (IGNITION SW AT ON POSITION)
: 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)
: 6.0–14.0 VOLTS (ENGINE CRANKING)
: 0.7–1.0 VOLTS (ENGINE CRANKING OR IDLING)
: 10.0–14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)
: 8.0–14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
: 4.0–6.0 VOLTS (IGNITION SW ON AND HEATER BLOWER SW ON)
: 10.0–14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR TE1–E1 NOT CONNECTED)
: 0.5 OR LESS (IGNITION SW ON AND CHECK CONNECTOR TE1–E1 CONNECTOR)
: 0–2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE)
: 10.0–14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)
: 10.0–14.0 VOLTS (CRANKING FOR 10 SECONDS AFTER STARTING)
: INFINITY (THROTTLE VALVE OPEN)
0 Ω (THROTTLE VALVE FULLY CLOSED)
: 0 Ω (THROTTLE VALVE FULLY OPEN)
INFINITY (THROTTLE VALVE FULLY CLOSED)
: 2.0 – 3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)
: 0.2 – 0.4 KΩ (COOLANT TEMP. 80°C, 176°F)
: 0.17–0.21 KΩ
: 19.3–22.3 Ω
: 19.3–22.3 Ω
CODE
F16
I 1
I 2
I 6
I 7
I 8
I 9
I10
I12
J 2
RELAY BLOCKS (RELAY BLOCK LOCATION)
R/B NO. 4 (RIGHT KICK PANEL)
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL) COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)
ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)
ENGINE WIRE AND J/B NO 2 (NEAR THE BATTERY) ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)
ENGINE ROOM MAIN WIRE AND J/B NO 2 (NEAR THE BATTERY) ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)
COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
SEE PAGE
30 (L/B), 31 (C/P)
A 27 (4A–FE)
B 27 (4A–FE)
27 (4A–FE)
27 (4A–FE)
27 (4A–FE)
27 (4A–FE)
27 (4A–FE)
29
29
CODE SEE PAGE
J 6 29
N I 27 (4A–FE)
O 5 27 (4A–FE)
O 6 27 (4A–FE)
T 1 27 (4A–FE)
V 1 27 (4A–FE)
V 2 27 (4A–FE)
V 3 27 (4A–FE)