1996 TOYOTA T100 diagram

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R/B No.2
B−W
22E6 E6
E6 E6
BRE1 E1
EB
2
2
22
From Battery
To Body GroundFrom
IG Switch
EFI RelayW−R
EFI
2
2
15 13EA1IE1 W−RW−RW−R 99
W−R
Heated
Oxygen
Sensor
(Bank 1
Sensor 2)2
13
423
14Heated
Oxygen
Sensor
(Bank 1
Sensor 1)
P−G
E5 E7
E7
E5
E5 E7 R−G RECM
OX1
HT1
OX2
E1
HT2E03
E03 (M/T)(A/T)5
3
13
24
913
16
19
16
15 W
BR BR
BR
DI−170
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
HINT:
After confirming DTC P0125 use the OBD II scan tool or TOYOTA hand−held tester to confirm voltage output
of heated oxygen sensor from "CURRENT DATA".
If voltage output of heated oxygen sensor is 0 V, heated oxygen sensor circuit may be open or short.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Connect OBD II scan tool or TOYOTA hand−held tester and read value for
voltage output of heated oxygen sensor (bank 1 sensor 1).
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand−held tester to the DLC3.
(b) Warm up the engine to normal operating temp.
CHECK:
Read voltage output of heated oxygen sensor (bank 1 sensor 1) when engine is suddenly raced.
HINT:
Perform quick racing to 4,000 rpm 3 times using the accelerator pedal.
OK:
Heated oxygen sensor (bank 1 sensor 1) output a RICH signal (0.45 V or more) at least once
OK Check and replace ECM (See page IN−26).
NG

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Vehicle speed
50 ∼ 65 km/h
(31 ∼ 40 mph)
Idling
IG SW OFF
1 ∼ 3 min. 1 min. Time
(1)(2)(3)(4)
(5)
DI−172
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0130 Heated Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 1)
CIRCUIT DESCRIPTION
Refer to DTC P0125 on page DI−169.
DTC No.DTC Detecting ConditionTrouble Area
P0130
Voltage output of heated oxygen sensor remains at 0.35 V or
more, or 0.55 V or less, during idling after engine is warmed up
(2 trip detection logic)Heated oxygen sensor
Fuel trim malfunction
HINT:
Sensor 1 refers to the sensor closer to the engine body.
The heated oxygen sensor’s output voltage and the shortterm fuel trim value can be read using the
OBD II scan tool or TOYOTA handheld tester.
WIRING DIAGRAM
Refer to DTC P0125 on page DI−169.
CONFIRMATION DRIVING PATTERN
(1) Connect the TOYOTA hand−held tester to the DLC3.
(2) Switch the TOYOTA hand−held tester from normal mode to check mode (See page DI−129).
(3) Start the engine and warm it up with all the accessory switches OFF.
(4) Drive the vehicle at 50 − 65 km/h (31 − 40 mph) for 1 − 3 min. to warm up the heated oxygen sensor.
(5) Let the engine idle for 1 min.
HINT:
If a malfunction exists, the MIL will light up during step (5).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a TOYOTA hand−held tester, turn the ignition switch OFF after performing steps
(3) to (5), then perform steps (3) to (5) again.
DI0UO−01

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P24318
P24317A00109
ON
HT1 (+) HT2 (+)
HT1 (+)HT2 (+) For M/T
For A/T
DI−176
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0135 Heated Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 1)
DTC P0141 Heated Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 on page DI−169.
DTC No.DTC Detecting ConditionTrouble Area
P0135
P0141
When heater operates, heater current exceeds 2.35 A
(2 trip detection logic)Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
ECM
Heater current of 0.2 A or less when heater operates
(2 trip detection logic)
HINT:
Sensor 1 refers to the sensor closer to the engine body.
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 on page DI−169.
INSPECTION PROCEDURE
1 Check voltage between terminals HT1, HT2 of ECM connector and body ground.
PREPARATION:
(a) Remove the right cowl side trim (See page SF−61).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals HT1, HT2 of ECM connec-
tor and body ground.
HINT:
Connect terminal HT1 to bank 1 sensor 1.
Connect terminal HT2 to bank 1 sensor 2.
OK:
Voltage: 9 − 14 V
OK Check and replace ECM (See page IN−26).
NG
DI0UQ−01

Downloaded from www.Manualslib.com manuals search engine DI−178
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0136 Heated Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 on page DI−169.
DTC No.DTC Detecting ConditionTrouble Area
P0136
Voltage output of heated oxygen sensor (bank 1 sensor 2)
remains at 0.4 V or more or 0.5 V or less when vehicle is
driven at 50 km/h (31 mph) or more after the engine is
warmed up.
(2 trip detection logic).
Heated oxygen sensor
HINT:
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 on page DI−169.
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0136) being output?
YES Go to relevant DTC chart.
NO
2 Check for open and short in harness and connector between ECM and heated
oxygen sensor (See page IN−26).
NG Repair or replace harness or connector.
OK
DI0UR−01

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Battery W−RW−R
R−L W
AM2
2
2 4
3R/B No.28
IA3
8
7Switch IG
B−R
IE114
B−R
B−RB−R
B−R 2
B−R 2
B−R 2
B−R 2
B−R 2
B−R 2Injector
No.1
No.2
No.3
No.4
No.5
No.61
1
1
1
1
1W−R
W
W−G
Y−R
W−L
Y−B
BR
BRE7 E7
E7 E7
E7 E7
E7 E7
E7 E7
E7 E7
E7 E7
E7 E7
(M/T)(A/T)
EB
12 10
11 9
25 8
10 7
96
85
13 34
26 33#10
#20
#30
#40
#50
#60
E01
E02ECM
FI6588
FI6538
A00064
10 V
/Division10 V
/Division
GND GND
100 msec./Division (Idling)1 msec./Division (Idling)
Injection duration
(Magnification)
DI−184
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
WIRING DIAGRAM
Reference INSPECTION USING OSCILLOSCOPE
INJECTOR SIGNAL WAVEFORM
With the engine idling, measure between terminals #10 − #60 and E01 of ECM.
HINT:
The correct waveform is as shown.

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ECM
KNK1
KNK2E1
E1 617
316 E6
E6E6
E6
(M/T)(A/T) BB
GRGR EC1
EC11
2 1
1 Knock Sensor 1
(On right bank)
Knock Sensor 2
(On left bank) DI−188
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0325 Knock Sensor 1 Circuit Malfunction
DTC P0330 Knock Sensor 2 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensors are fitted one to the right bank and left bank of the cylinder block to detect engine knocking.
This sensor contains a piezoelectric element which generates a voltage when it becomes deformed, which
occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, ignition timing is retarded
to suppress it.
DTC No.DTC Detecting ConditionTrouble Area
P0325No knock sensor 1 signal to ECM with engine speed between
1,760 rpm and 5,600 rpmOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
P0330No knock sensor 2 signal to ECM with engine speed between
1,760 rpm and 5,600 rpmOpen or short in knock sensor 2 circuit
Knock sensor 2 (looseness)
ECM
If the ECM detects the above diagnosis conditions, it operates the fail safe function in which the corrective
retard angle value is set to the maximum value.
WIRING DIAGRAM
DI0UU−01

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ECM
G
G−
NE
NE− B
W
G
L 1
2
1
2 Camshaft Position Sensor
Crankshaft Position Sensor11 1 0
511
12 5
66 E5 E5
E5
E5E6
E6
E6
E6
E1
(M/T) (A/T)
− DIAGNOSTICSENGINE (5VZ−FE)
DI−191
1996 TOYOTA T100 (RM449U)
DTC P0335 Crankshaft Position Sensor ”A” Circuit
Malfunction
CIRCUIT DESCRIPTION
The crankshaft position sensor, which detects the engine speed and crankshaft angle signal (NE signal),
has been installed on the oil pump body.
The NE signal plate has 34 teeth. The NE signal sensor generates 34 signals of every engine revolution.
The ECM detects the standard crankshaft angle based on the G signals, and the actual crankshaft angle
and the engine speed by the NE signals.
DTC No.DTC Detecting ConditionTrouble Area
P0335
No crankshaft position sensor signal to ECM during cranking
(2 trip detection logic)Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Starter
ECM
No crankshaft position sensor signal to ECM with engine
speed 600 rpm or more (2 trip detection logic)
WIRING DIAGRAM
DI0UV−01

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− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
DTC P0340 Camshaft Position Sensor Circuit
Malfunction
CIRCUIT DESCRIPTION
The camshaft position sensor which detects the crankshaft angle signal (G signal), has been installed on
the front of right bank cylinder head. The timing rotor has been integrated with the right bank camshaft timing
pulley. When the camshafts rotate, the protrusion on the timing rotor and the air gap on the pickup coil
change, causing fluctuations, in the magnetic field and generating an electromotive force in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G signals
and the actual crankshaft angle and the engine speed by the NE signals.
DTC No.DTC Detecting ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)Open or short in camshaft position sensor circuit
Camshaft position sensor
Starter
ECM
No camshaft position sensor signal to ECM with engine
speed 600 rpm or more
WIRING DIAGRAM
Refer to DTC P0335 on page DI−191.
INSPECTION PROCEDURE
1 Check resistance of camshaft position sensor (See page IG−1).
Reference INSPECTION USING OSCILLOSCOPE
Refer to DTC P0335 on page DI−191.
NG Replace camshaft position sensor.
OK
2 Check for open and short in harness and connector between ECM and camshaft
position sensor (See page IN−26).
NG Repair or replace harness or connector.
OK
DI0UW−02