TOYOTA T100 1996 Factory Service Manual

Downloaded from www.Manualslib.com manuals search engine BE6653A00773A00788Fuel Inlet Hose
ON
− DIAGNOSTICSENGINE (5VZ−FE)
DI−257
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
TOYOTA hand−held tester:
1 Connect TOYOTA hand−held tester and check operation of fuel pump.
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.
(c) Use ”ACTIVE TEST” mode to operate the fuel pump.
CHECK:
Check for fuel pressure in the fuel inlet hose when it is pinched
off.
OK:
There is pressure in the fuel inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
OK Go to step 7.
NG
2 Check for ECM power source circuit (See page DI−244).
NG Repair or replace.
OK

Downloaded from www.Manualslib.com manuals search engine A00685
2 (+)
1 (+)
4 (−)
1 2
34
6
BE6653
P24225
P24335A00128
ON
For M/T
For A/TFC (+)
FC (+)
DI−258
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
3 Check circuit opening relay.
PREPARATION:
Remove the circuit opening relay (See page SF−46).
CHECK:
(a) Apply battery voltage between terminals 2 and 4.
(b) Measure voltage between terminals 1 and 4.
OK:
Voltage: Same as battery
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC 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 terminal FC of ECM connector and
body ground.
OK:
Voltage: 9 − 14 V
NG Check for open in harness and connector be-
tween EFI main relay and circuit opening relay,
and ECM (See page IN−26).
OK

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1 2
34
6
3 (+)
6 (−)1
2
− DIAGNOSTICSENGINE (5VZ−FE)
DI−259
1996 TOYOTA T100 (RM449U)
5 Check fuel pump (See page SF−5).
NG Repair or replace fuel pump.
OK
6 Check for open in harness and connector between circuit opening relay and fuel
pump, fuel pump and body ground (See page IN−26).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−26).
7 Check circuit opening relay.
PREPARATION:
Remove the circuit opening relay (See page SF−46).
CHECK:
(a) Apply battery voltage between terminals 3 and 6.
(b) Check continuity between terminal 1 and 2.
OK:
Continuity
NG Replace circuit opening relay.
OK

Downloaded from www.Manualslib.com manuals search engine A00687
START3
BE6653P24337P24336
A00773A00789
ON
For M/T
For A/TFC (+)
FC (+)
Fuel Inlet Hose
DI−260
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
8 Check voltage between terminal 3 of circuit opening relay connector and body
ground.
CHECK:
Measure voltage between terminal 3 of circuit opening relay
connector and body ground when engine is cranked.
OK:
Voltage: 9 − 14 V
NG Check for starter signal circuit (See page
DI−248).
OK
Check for open in harness and connector be-
tween terminal 6 of circuit opening relay con-
nector and body ground (See page IN−26).
OBD II scan tool (excluding TOYOTA hand−held tester):
1 Check operation of fuel pump.
PREPARATION:
(a) Remove the right cowl side trim (See page SF−61).
(b) Turn the ignition switch ON.
CHECK:
(a) Connect between terminal FC of ECM connector and
body ground.
(b) Check for fuel pressure in the inlet hose when it is pinched
off.
OK:
There is pressure in the fuel inlet hose.
HINT:
At this time, you will hear a fuel flowing noise.
OK Go to step 7.
NG

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSENGINE (5VZ−FE)
DI−261
1996 TOYOTA T100 (RM449U)
2 Check for ECM power source circuit (See page DI−251).
NG Repair or replace.
OK
3 Check circuit opening relay (See page DI−255, step 3).
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC of ECM connector and body ground (See
page DI−255, step 4).
NG Check for open in harness and connector be-
tween EFI main relay and circuit opening relay
and ECM (See page IN−26).
OK
5 Check fuel pump (See page SF−5).
NG Repair or replace fuel pump.
OK

Downloaded from www.Manualslib.com manuals search engine DI−262
− DIAGNOSTICSENGINE (5VZ−FE)
1996 TOYOTA T100 (RM449U)
6 Check for open in harness and connector between circuit opening relay and fuel
pump, fuel pump and body ground (See page IN−26).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−26).
7 Check circuit opening relay (See page DI−255, step 7).
NG Replace circuit opening relay.
OK
8 Check voltage between terminal 3 of circuit opening relay connector and body
ground (See page DI−255, step 8).
NG Check for starter signal circuit (See page
DI−248).
OK
Check for open in harness and connector be-
tween terminal 6 of circuit opening relay con-
nector and body ground (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine DI0VD−02
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freezes Frame Data (Precheck)
Record or Print DTC and Freezed Frame Data P.
DI−265
Clear DTC and Freezed Frame Data P. DI−265
Visual Inspection
Setting the Check Mode Diagnosis P.
DI−265
1
Items insideare titles of pages in this manual, with the
page number indicated in the bottom portion. See the indicated
pages for detailed explanations.
P.
DI−264
Connect an OBD II scan tool or TOYOTA hand−held tester to DLC3
If the display shows ”UNABLE TO CONNECT TO VEHICLE” when you have connected the
scan tool/TOYOTA hand−held tester, inspect DLC3 P.
DI−265
2
3
4
5
6
symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
P.
IN−16symptom occur
DTC Check
P. DI−265OK Code
11Preliminary Check
P.
DI−265
DTC Chart
P.
DI−276
Mechanical System Tests
P.
DI−265
Manual Shifting Test
P.
DI−265 OK
OK
Chapter 1
(Electronic)Chapter 2
(On−Vehicle)OKChapter 3
(Off−Vehicle)OK Problem Symptoms table
P. DI−282
Circuit
Inspection O/D Cancel Signal Check
 Stop Light Signal Check
NG
Parts Inspection
NG
NGNG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12
NG13
14
1516
17 9
10
P. DI−282
P. DI−286 to DI−316
18
P. DI−282P. DI−282
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−263
520 Author: Date:
1996 TOYOTA T100 (RM449U)
AUTOMATIC TRANSMISSION
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.

Downloaded from www.Manualslib.com manuals search engine DI0VE−01
Transmission Control
System Check SheetInspector ’s
Name:
Customer ’s Name
Registration No.
Registration Year
Frame No.
Date Vehicle
Brought InOdometer Readingkm
miles / /
/ /
Date Problem
Occurred
How Often Does
Problem Occur?/ /
 Continuous  Intermittent ( times a day)
Symptoms
 Vehicle does not move (  Any position  Particular position )
 No up−shift (  1st → 2nd  2nd → 3rd  3rd → O/D )
 No down−shift (  O/D → 3rd  3rd → 2nd  2nd → 1st )
 Lock−up malfunction
 Shift point too high or too low
 Harsh engagement (  N → D  Lock−up  Any drive position )
 Slip or shudder
 No kick−down
 Others
Check ItemMalfunction
Indicator Lamp
DTC Check1st Time
2nd Time Normal code  Malfunction code (Code )  Normal Remains ON
 Normal code  Malfunction code (Code ) DI−264
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
CUSTOMER PROBLEM ANALYSIS CHECK

Downloaded from www.Manualslib.com manuals search engine A00653
w/o Tachometer
w/ Tachometer
DI0VF−02
Q08498
TOYOTA Hand−Held Tester
DLC3
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−265
1996 TOYOTA T100 (RM449U)
PRE−CHECK
1. DIAGNOSIS SYSTEM
(a) Description
When troubleshooting OBD II vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you connect to the vehicle an OBD II scan
tool complying with SAE J1978 or TOYOTA hand−
held tester, and read off various data output from
the vehicle’s ECM.
OBD II regulations require that the vehicle’s on−
board computer lights up the Malfunction Indicator
Lamp (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself or
in drive system components which affect vehicle
emissions. In addition to the MIL lighting up when
a malfunction is detected, the applicable DTCs pre-
scribed by SAE J2012 are recorded in the ECM
memory.
(3RZ−FE: See page DI−13)
(5VZ−FE: See page DI−140)
If the malfunction only occurs in 3 trips, the MIL goes off but the
DTCs remain recorded in the ECM memory.
To check the DTCs, connect an OBD II scan tool or
TOYOTA hand−held tester to DLC3 on the vehicle.
The OBD II scan tool or TOYOTA hand−held tester
also enables you to erase the DTCs and check
freeze frame data and various forms of engine data
(For instruction book).
DTCs include SAE controlled codes and Manufac-
turer controlled codes.
SAE controlled codes must be set as prescribed by
the SAE, while Manufacturer controlled codes can
be set freely by the manufacturer within the pre-
scribed limits (See DTC chart on page DI−276).

Downloaded from www.Manualslib.com manuals search engine N09214
DI−266
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
The diagnosis system operates in normal mode
during normal vehicle use, and also has a check
mode for technicians to simulate malfunction symp-
toms and perform troubleshooting. Most DTCs use
2 trip detection logic(*) to prevent erroneous detec-
tion. By switching the ECM to check mode when
troubleshooting, the technician can cause the MIL
to light up and for a malfunction that is only detected
once or momentarily (TOYOTA hand−held tester)
(See page DI−265).
*2 trip detection logic:
When a logic malfunction is first detected, the mal-
function is temporarily stored in the ECM memory.
If the same malfunction is detected again during the
2nd test drive, this 2nd detection causes the MIL to
light up.
(b) Inspect the DLC3.
The vehicle’s ECM uses the V.P.W. (Variable Pulse Width)
for communication to comply with SAE J1850. The termi-
nal arrangement of DLC3 complies with SAE J1962 and
matches the V.P.W. format.
Terminal No.Connection / Voltage or ResistanceCondition
2Bus  Line / Pulse generationDuring communication
4Chassis Ground ↔ Body / 1 Ω or lessAlways
5Signal Ground ↔ Body / 1 Ω or lessAlways
16Battery Positive ↔ Body / 9 − 14 VAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of OBD II scan tool or TOY-
OTA hand−held tester to DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.