1996 TOYOTA T100 diagram

Downloaded from www.Manualslib.com manuals search engine A00652
ECM VSV for EVAP
Throttle
Valve
Fuel Tank Charcoal
CanisterFig 1
A00647
IG Switch
(M/T)(A/T)
23W−G
2
1
EFI
EFI Relay
VSV for
ECM From From
Battery
22
2
2
223 2
E7 E5
EA
W−B
IE2W−G1 R/B No.2
PRG
E01 4EVAP5
EA1
W−RW−R
921
B−W
DI−88
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0441 Evaporative Emission Control System
Incorrect Purge Flow
CIRCUIT DESCRIPTION
To reduce HC emissions, evaporated fuel from the fuel tank is
routed through the charcoal canister to the intake manifold for
combustion in the cylinders.
The ECM changes the duty signal to the VSV for EVAP so that
the intake quantity of HC emissions is appropriate for the driving
conditions (engine load, engine speed, vehicle speed, etc.) af-
ter the engine is warmed up.
DTC No.DTC Detecting ConditionTrouble Area
P0441Proper response to computer command does not occur
(2 trip detection logic)
Open or short in VSV circuit for EVAP
VSV for EVAP
ECM
Vacuum hose cracks, hole, blocked, damaged or
disconnected
Charcoal canister
WIRING DIAGRAM
DI0TX−03

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A00081
CableTo Speedometer Cable
T/M4−pulse
ECMMagnet Reed Switch
No.1 Vehicle Speed SensorCombination
Meter
P19617
ECM From Cruise
Control ECU
Combination Meter5 V
E1 SP1
E4 E4
(M/T)(A/T) G (M/T) G (M/T)
G (A/T)IE198
10
No.1
Vehicle
Speed
Sensor6
GG
C11
DI−92
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
This No.1 vehicle speed sensor is mounted in the combination meter. It contains a magnet which is rotated
by the speed meter cable.
Turning the reed switch ON and OFF 4 times for every revolution of the speedmeter.
It is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of these
pluse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under conditions (a)
(2 trip detection logic)
(a) Vehicle is being drivenOpen or short in No.1 vehicle speed sensor circuit
No.1 vehicle speed sensor
ECM
Speedometer cable
WIRING DIAGRAM
DI0TY−05

Downloaded from www.Manualslib.com manuals search engine P01559
Throttle Valve
To Cylinder ECM
Signal
From
Air
Cleaner
Valve
IAC Valve
Intake Air
Chamber
P19957
ECM
RSC
RSOE01
E01 V−Y
V−R96
10 7 E7 E7
E7 E7
(M/T)(A/T)
3
1 IAC
Valve
W−R IG Switch FromFrom Battery
R/B No.2EFI Relay
EFI2
IE1
EA1
W−R
9
9
EA
W−R
W−B 2
2
2 B−W
22
15 2
2
B−Y
EA1
W−R
B−Y
4
IGN
J/B
No.11A
1C 3
17
3 DI−94
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0505 Idle Control System Malfunction
CIRCUIT DESCRIPTION
The rotary solenoid type IAC valve is located in front of the in-
take air chamber and intake air bypassing the throttle valve is
directed to the IAC valve through a passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controlling the engine speed.
The ECM operates only the IAC valve to perform idle−up and
provide feedback for the target idling speed.
DTC No.DTC Detecting ConditionTrouble Area
P0505Idle speed continues to vary greatly from target speed
(2 trip detection logic)IAC valve is stuck or closed
Open or short in IAC valve circuit
Air intake (hose loose)
WIRING DIAGRAM
DI0TZ−03

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DI−97
1996 TOYOTA T100 (RM449U)
DTC P0510 Closed Throttle Position Switch Malfunction
CIRCUIT DESCRIPTION
Refer to DTC P0120 on page DI−39.
DTC No.DTC Detecting ConditionTrouble Area
P0510
Closed throttle position switch does not turn ON even once
when vehicle is driven
(2 trip detection logic)Open in closed throttle position switch circuit
Closed throttle position switch
ECM
HINT:
After confirming DTC P0510 use the TOYOTA hand−held tester to confirm the closed throttle position switch
signal from ”CURRENT DATA”.
Throttle ValveClosed Throttle Position Switch SignalMalfunction
Fully closedOFFOpen circuit
Fully openONShort circuit
WIRING DIAGRAM
Refer to DTC P0120 on page DI−39.
INSPECTION PROCEDURE
HINT:
If DTC P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) may be open.
TOYOTA hand−held tester:
1 Connect TOYOTA hand−held tester and read CTP switch signal.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand−held tester main switch ON.
CHECK:
Read CTP switch signal on the TOYOTA hand−held tester.
RESULT:
Throttle ValveClosed Throttle Position Switch SignalMalfunction
Fully closedOFFOpen circuit: Go to step 2
Fully openONShort circuit: Go to step 4
DI0U0−03

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IG Switch
(M/T)(A/T)
23ECM
E7 E7 1
AM2
IA3
8W−RW−R
8
2
27
B−R
R−L
W Battery
IE1R/B No.2B−R
B−R
25 V
Tr
1
20
317
E7 E7 14B−L
B−Y2
1 Tr
2
3 4
Tachometer To To
Spark plug
B−W
Igniter IgnitionCoil
IGT
IGF 5
− DIAGNOSTICSENGINE (3RZ−FE)
DI−103
1996 TOYOTA T100 (RM449U)
DTC P1300 Ignition Circuit Malfunction
CIRCUIT DESCRIPTION
The ECM determines the ignition timing, turns on Tr1 at a predetermined angle (°CA) before the desired igni-
tion timing and outputs an ignition signal (IGT) ”1” to the igniter.
Since the width of the IGT signal is constant, the dwell angle control circuit in the igniter determines the time
the control circuit starts primary current flow to the ignition coil based on the engine rpm and ignition timing
one revolution ago, that is, the time the Tr
2 turns on.
When it reaches the ignition timing, the ECM turns Tr
1 off and outputs the IGT signal ”0”.
This turns Tr
2 off, interrupting the primary current flow and generating a high voltage in the secondary coil
which causes the spark plug to spark. Also, by the counter electromotive force generated when the primary
current is interrupted, the igniter sends an ignition confirmation signal (IGF) to the ECM. The ECM stops fuel
injection as a fail safe function when the IGF signal is not input to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1300No IGF signal to ECM for 4 consecutive IGT signal during
engine runningOpen or short in IGF or IGT circuit from igniter to ECM
Igniter
ECM
WIRING DIAGRAM
DI0U1−03

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DI−109
1996 TOYOTA T100 (RM449U)
DTC P1335 Crankshaft Position Sensor Circuit
Malfunction (during engine running)
CIRCUIT DESCRIPTION
Refer to DTC P0335 on page DI−66.
DTC No.DTC Detecting ConditionTrouble Area
P1335No crankshaft position sensor signal to ECM with engine
speed 1,000 rpm or moreOpen or short in crankshaft position sensor circuit
Crankshaft position sensor
ECM
WIRING DIAGRAM
Refer to DTC P0335 on page DI−66.
INSPECTION PROCEDURE
Refer to DTC P0335 on page DI−66.
DI0U2−01

Downloaded from www.Manualslib.com manuals search engine P19741
ECM
STA
E1 E4
(M/T) (A/T)
11
E4 11
B−R
Starter IE1
B−R
B−RB−R B−R (M/T)
21 35
Starter
Relay 1
2
W−B (A/T)
IC
B (A/T) W
Park/Neutral
Position Switch
15
B
5
6 B−Y 22
IA3
AM1
W
ALT
BatteryR/B No. 2W−B (M/T)
Clutch
Start
SwtichIE1
B (M/T) B−Y
6 3 W
W
W
14IE1
2
2
2
2
W
DI−11 0
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P1500 Starter Signal Circuit Malfunction
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporazation is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is ap-
plied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for
the starting injection control and after−start injection control.
DTC No.DTC Detecting ConditionTrouble Area
P1500No starter signal to ECM
Open or short in starter signal circuit
Open or short in ignition swtich or starter relay circuit
ECM
HINT:
In this circuit, diagnosis can only be made in the check mode.
WIRING DIAGRAM
DI984−01

Downloaded from www.Manualslib.com manuals search engine S00876
W−RB−G
EFI
R/B No.2 22
W
8
EA1 IE1B−G
(M/T)17
B−G (A/T)B−G
(M/T)
E4 E42 1
(M/T)(A/T)ECM
BATT
Battery DI−11 2
− DIAGNOSTICSENGINE (3RZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P1600 ECM BATT Malfunction
CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is OFF for
use by the DTC memory and air−fuel ratio adaptive control value memory, etc.
DTC No.DTC Detecting ConditionTrouble Area
P1600Open in back up power source circuitOpen in back up power source circuit
ECM
HINT:
If DTC P1600 appear, the ECM does not store another DTC.
WIRING DIAGRAM
DI0U4−03