1996 TOYOTA T100 battery

Downloaded from www.Manualslib.com manuals search engine S00594
Vapor Pressure SensorECM
From
Battery
From
IG SwitchII
IDIM12H
2D2C
2BE7
E6
E7
E6
E6 3
92
25
12 3
AA2 1
8 2 1 VSV (for EVAP)
VSV
(for Vapor
Pressure Sensor) LG
W−B B−O BP L−R
BR13
22 3
2
1
10
IGN
Instrument
Panel J/BDriver Side J/B
EFI Relay
EB
J/B
No.3VC
E2
E1
E01
E01 TPC EVP 1PTNK
BR
EFI
A
12 LGW−L 3
B−O5 V
− DIAGNOSTICSENGINE (5VZ−FE)
DI−213
1996 TOYOTA T100 (RM449U)
WIRING DIAGRAM
INSPECTION PROCEDURE
TOYOTA hand−held tester:
1 Check VSV connector for EVAP, VSV connector for vapor pressure sensor and
vapor pressure sensor connector for looseness and disconnection.
NG Repair or connect VSV or sensor connector.
OK

Downloaded from www.Manualslib.com manuals search engine P01559
Throttle Valve
From
Air
Cleaner
Signal
ECM
ValveIAC Valve
To Cylinders Intake Air Chamber
P19957
ECM
RSC
RSOE01
E01 B−R
BR−R6
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 3 B−W
22 2
5 1
1 2
2 B−YEA1
W−R
B−Y
4
IGNJ/B
No.11A
1C 3
1722
23 DI−228
− DIAGNOSTICSENGINE (5VZ−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 and a VSV for idle−
up control is also added (for air conditioning).
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
Open or short in A/C signal circuit
Air intake (hose loose)
WIRING DIAGRAM
DI0V4−01

Downloaded from www.Manualslib.com manuals search engine S00251
From BatteryIgnition Coil
Spark Plug
IGC1
IGC2
IGC3
GND TA C IGT1
IGT2
IGT3
IGF
To Tachometer ECM G
NE
Camshaft
Position
Sensor
Crankshaft
Position
Sensor
Various
SensorNo.1 Cylinder
No.4 Cylinder
No.5 Cylinder
No.2 Cylinder
No.3 Cylinder
No.6 Cylinder
− DIAGNOSTICSENGINE (5VZ−FE)
DI−235
1996 TOYOTA T100 (RM449U)
DTC P1300 Igniter Circuit Malfunction
CIRCUIT DESCRIPTION
A DIS (Direct Ignition System) has been adopted. The DIS improves the ignition timing accuracy, reduces
high−voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 2−cylinder simultaneous ignition system which ignites 2 cylinders simultaneously with one igni-
tion coil. In the 2−cylinder simultaneous ignition system, each of the 2 spark plugs is connected to the end
of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark
plugs. The sparks of the 2 spark plugs pass simultaneously from the center electrode to the ground elec-
trode.
The ECM determines ignition timing end outputs the ignition signals (IGT) for each cylinder. Based on IGT
signals, the igniter controls the primary ignition signals (IGC) for all ignition coils. At the same time, the igniter
also sends an ignition confirmation signal (IGF) as a fail−safe measure to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1300
No IGF signal to ECM for 6 consecutively IGT signals during
engine runningOpen or short in IGF or IGT circuit from igniter to ECM
Igniter
ECM
DI0V5−01

Downloaded from www.Manualslib.com manuals search engine S00903
Battery W−R
W−R R−L WAM2
2
24
3R/B 8
IA3Switch IG
B−R
IE1
B−L
BR−B
B−W
B−Y
BRInjector
No.1
No.2
No.3
EB
8B−R
714
No.2Spark
PlugB−RB−RECM
Ignition
Coil
B−R
BR−Y
BR−W
B−R
B−R
B−W
2 1
2 1
2 1
10
2
1
3
8 4 5 6 7 9
To
Tachometer
(M/T)(A/T)
E7 E7
E7 E7
E7 E7
E7 E7IGT1 23 24
22 25
21 26
17 12IGT2
IGT3
IGF5 V
DI−236
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check spark plug (See page IG−1).
NG Go to step 4.
OK

Downloaded from www.Manualslib.com manuals search engine S00900
DI−242
− DIAGNOSTICSENGINE (5VZ−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 vaporization is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery positive volt-
age is applied 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 switch or starter relay circuit
ECM
HINT:
In this circuit, diagnosis can only be made in the check mode.
WIRING DIAGRAM
DI9AG−01

Downloaded from www.Manualslib.com manuals search engine S00899
W−R
Battery1
222
R/B No.2
W
EFIB−GB−G 8
EA1214
(M/T)(A/T)E4 E4ECM
BATT DI−244
− DIAGNOSTICSENGINE (5VZ−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
DI0V8−01

Downloaded from www.Manualslib.com manuals search engine BE6653
P24217
P24330
A00125
LOCK
For M/T
For A/TBATT (+)
BATT (+)
FI7107
EFI Fuse
R/B No.2
− DIAGNOSTICSENGINE (5VZ−FE)
DI−245
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check voltage between terminal BATT of ECM connector and body ground.
PREPARATION:
Remove the right cowl side trim (See page SF−61).
CHECK:
Measure voltage between terminal BATT of ECM connector
and body ground.
OK:
Voltage: 9 − 14 V
OK Check and replace ECM (See page IN−26).
NG
2 Check EFI fuse.
PREPARATION:
Remove the EFI fuse from the R/B No.2.
CHECK:
Check continuity of EFI fuse.
OK:
Continuity
NG Check for short in all harness and
components connected to EFI fuse.
OK
Check and repair harness or connector
between battery, EFI fuse and ECM.

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSENGINE (5VZ−FE)
DI−247
1996 TOYOTA T100 (RM449U)
DTC P1780 Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch goes on when the shift lever is in the N or P shift position. When it goes on
terminal NSW of the ECM is grounded to body ground via the starter relay, thus the terminal NSW voltage
becomes 0 V. When the shift lever is in the D, 2, L, or R position, the park/neutral position switch goes off,
so the voltage of ECM. Terminal NSW becomes battery voltage, the voltage of the ECM internal power
source. If the shift lever is moved from the N position to the D position, this signal is used for air−fuel ratio
correction and for idle speed control (estimated control), etc.
DTC No.DTC Detecting ConditionTrouble Area
P1780
2 or more switches are ON simultaneously for ”R”, ”N”, ”2”
and ”L” and position
(2 trip detection logic)
Short in park/neutral position switch circuit
Park/neutral position switch
ECMWhen driving under conditions (a) and (b) for 30 sec. or
more park/neutral position switch is ON (N position):
(2 trip detection logic)
(a) Vehicle speed: 70 km/h (44 mph) or more
(b) Engine speed: 1,500 ∼ 2,500 rpm
HINT:
After confirming DTC P1780 use the TOYOTA hand−held tester to confirm the PNP switch signal from ”CUR-
RENT DATA”.
WIRING DIAGRAM
Refer to DTC P1780 on page DI−247.
INSPECTION PROCEDURE
Refer to DTC P1780 on page DI−247.
DI0V9−01