1996 TOYOTA LAND CRUISER trans

A00149
DLC1
E1
TE1 SST
P09137
P23430
−
DIAGNOSTICS ENGINE
DI−9
1996 LAND CRUISER (RM451U)
OK
5 Check idle speed.
PREPARATION:
(a) Warm up engine to normal operating temperature.
(b) Switch off all accessories.
(c) Switch off air conditioning.
(d) Shift transmission into ”N” position.
(e) Connect the OBD II scan tool or TOYOTA hand−held tester to DLC3 on the vehicle.
CHECK:
Use CURRENT DATA to check the idle speed.
OK:
Idle speed: 650 ± 50 rpm
NG Proceed to matrix chart of problem symptomson page DI−19.
OK
6 Check ignition timing.
PREPARATION:
(a) Warm up engine to normal operating temperature.
(b) Shift transmission into ”N” position.
(c) Keep the engine speed at idle.
(d) Using SST, connect terminals TE1 and E1 of DLC1. SST 09843−18020
(e) Connect a timing light probe to a high −tension cord.
CHECK:
Check ignition timing.
OK:
Ignition timing: 3 ° BTDC at idle
NG Proceed to page IG−1 and continue to trouble-
shoot.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI−18
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
IGT (E4 −
23) − E1 (E4 − 24)
B − G ↔ BR − BIdlingPulse generation
(See page DI−97)
IGF (E4 − 17) − E1 (E4 − 24)B − Y ↔ BR − B
IG switch ON
Disconnect igniter connector4.5 − 5.5
IdlingPulse generation
(See page DI−97)
G1 (E6 − 11) − G − (E6 − 6)R ↔LIdlingPulse generation
(See page DI−62)
G2 (E6 − 10) − G − (E6 − 6)G ↔LIdlingPulse generation
(See page DI−62)
NE (E6 − 12) − G − (E6 − 6)W ↔LIdlingPulse generation
(See page DI−62)
NE2 (E6 − 5) − G − (E6 − 6)BR ↔ LIdlingPulse generation
(See page DI−62)
W (E7 − 4) − E1 (E4 − 24)Y − R ↔ BR − BIdling9 − 14
IG switch ON0 − 3
EGR (E4 − 22) − E1 (E4 − 24)L − W ↔ BR − BIG switch ON9 − 14
ISC1 (E4 − 7) − E01 (E4 − 13)R − G ↔ BRIG switch ON9 − 14
ISC2 (E4 − 6) − E01 (E4 − 13)R − B ↔ BRIG switch ON9 − 14
ISC3 (E4 − 5) − E01 (E4 − 13)G − Y ↔ BRIG switch ON9 − 14
ISC4 (E4 − 4) − E01 (E4 − 13)L − Y ↔ BRIG switch ON9 − 14
OX1 (E5 − 5) − E1 (E4 − 24)L ↔ BR − BMaintain engine speed at 2,500 rpm for 2 mins. after
warming upPulse generation
OX2 (E5 − 13) − E1 (E4 − 24)W ↔ BR − BMaintain engine speed at 2,500 rpm for 2 mins. after
warming upPulse generation
HT1 (E6 − 1) − E03 (E6 − 16)GR↔BRIdlingBelow 3.0
IG switch ON9 − 14
HT2 (E6 − 7) − E03 (E6 − 16)O↔ BRIdlingBelow 3.0
IG switch ON9 − 14
KNK1 (E5 − 6) − E1 (E4 − 24)W ↔BR − BIdlingPulse generation
(See page DI−62)
KNK2 (E5 − 14) − E1 (E4 − 24)L − W ↔ BR − BIdlingPulse generation
(See page DI−62)
SPD (E7 − 8) − E1 (E4 − 24)L − W ↔ BR − BIG switch ON
Rotate driving wheel slowly.Pulse generation
TE1 (E5 − 7) − E1 (E4 − 24)L↔ BR − BIG switch ON9 − 14
A/C (E7 − 7) − E1 (E4 − 24)B − W↔BR − BIdling, A/C switch ON9 − 14
Idling, A/C switch OFFBelow 2.0
THG (E4 − 19) − E2 (E5 − 9)G − Y↔ BR − BIG switch ON4.5 − 5.5
FC (E4 − 14) − E1 (E4 − 24)R − W↔BR − BIG switch ON9 − 14
Idling0 − 3
FPU (E4 − 21) − E1 (E4 − 24)L − R ↔BR − BIG switch ON9 − 14
Restarting at high engine coolant temp.0 − 3
SDL (E7 − 6) − E1 (E4 − 24)W ↔BR − BDuring transmissionPulse generation
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI5OZ−02
A00152
Output Voltage
Power Transistor
B+
Thermistor
Platinum Hot Wire
A B
Thermistor Platinum Hot Wire
FI6929 P22263
DI−20
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
CIRCUIT INSPECTION
DTC P0100 Mass Air Flow Circuit Malfunction
CIRCUIT DESCRIPTION
The mass air flow meter uses a platinum hot wire. The hot wire air flow met\
er consists of a platinum hot wire,
thermistor and a control circuit installed in a plastic housing. The hot wire air f\
low meter works on the principle
that the hot wire and thermistor located in the intake air bypass of the hou\
sing detect any changes in the
intake air temperature.
The hot wire is maintained at the set temperature by controlling the curren\
t flow through the hot wire. This
current flow is then measured as the output voltage of the air flow mete\
r.
The circuit is constructed so that the platinum hot wire and thermistor pro\
vide a bridge circuit, with the power
transistor controlled so that the potential of ”A” and ”B” remains equ\
al to maintain the set temperature.
DTC No.DTC Detecting ConditionTrouble Area
P0100Open or short in mass air flow meter circuit with engine
speed 4,000 rpm or less. Open or short in mass air flow meter circuit
 Mass air flow meter
 ECM
If the ECM detects DTC” P0100” it operates the fail safe function, k\
eeping the ignition timing and injection
volume constant and marking it possible to drive the vehicle.
HINT:
After confirming DTC P0100 use the OBD II scan tool or TOYOTA hand −held tester to confirm the mass air
flow ratio from ”CURRENT DATA”.
Mass Air Flow Value (gm/sec.)Malfunction
Approx. 0Mass air flow meter power source open
 VG circuit open or short
439.0 or moreE21 circuit open
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

P22487
No.1 Vehicle
Speed SensorCombination
Meter ECM
4−pulse
4−pulse
P22473
Combination Meter
3
C13 L−WL
−W8
E7 SPD ECM
5V
E1
From Cruise Control ECU
−
DIAGNOSTICS ENGINE
DI−87
1996 LAND CRUISER (RM451U)
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4 − pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular wavefrom by the waveform shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of thes\
e pulse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under conditions (a)
and (b):
(2 trip detection logic)
(a) Park/neutral position switch is OFF.
(b) Vehicle is being driven. Open or short in No.1 vehicle speed sensor circuit
 No.1 vehicle speed sensor
 Combination meter
 ECM
WIRING DIAGRAM
DI5PN−02
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI5K4−03
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freezes Frame Data (Pre−check)
Record or Print DTC and Freezed Frame Data
DI−131
Clear DTC and Freezed Frame Data DI−131
Visual Inspection
Setting the Check Mode Diagnosis
DI−131
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.
Connect an OBD II scan tool or TOYOTA hand−held tester to DLC3.
If your display shows ”UNABLE TO CONNECT TO VEHICLE” when you have connected the
scan tool/TOYOTA hand− held tester, inspect DLC3
DI−131
2
3
4
5
6
symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
symptom occurs
DTC Check
DI−131 OK Code
11Preliminary Check
DTC ChartMechanical System Tests
Manual Shifting Test
OK
OK
Chapter 1
(Electronic) Chapter 2
(On−Vehicle)OKChapter 3
(Off
−Vehicle)OK
Matrix Chart of Problem Symptoms
− DI−147
Circuit
InspectionStop Light Signal
 O/D Cancel Signal Check
NG
Parts Inspection
NG
NG NG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12
NG13
14
15 16
17
9
10
DI−153 − DI−185
18
DI−130
DI−143
DI−131
DI−131
DI−131
DI−147 DI−147
DI−147
P.IN−18
Step 2, 3, 4, 6, 9, 15, 18:
Diagnostic steps permitting the use of the TOYOTA
hand−held tester or TOYOTA brake− out−box.
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−129
296
Author: Date:
1996 LAND CRUISER (RM451U)
AUTOMATIC TRANSMISSION
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI5K6−01
Transmission Control
System Check SheetInspector ’s
Name
:
Customer ’s Name
Registration No.
Registration Year
Frame No.
Date Vehicle
Brought In Odometer Reading
km
mile
/ /
/ /
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 Item Malfunction
Indicator Lamp
DTC Check1st Time
2nd Time
Normal code  Malfunction code (Code )

Normal 
Remains ON
 Normal code  Malfunction code (Code )
DI−130
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
CUSTOMER PROBLEM ANALYSIS CHECK
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI5K9−03
Q08225
Q08634
TOYOTA Hand−held Tester
DLC3
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−131
1996 LAND CRUISER (RM451U)
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 the 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 (See page DI−13).
If the malfunction does not 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 the DLC3 on the ve-
hicle. 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 en-
gine data (For operating instructions, see the OBDII
scan tool’s 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 page DI−143).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Q08225
Q08634
TOYOTA Hand−held Tester
DLC3
DI−132
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
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 for a malfunction that is only detected
once or momentarily (TOYOTA hand−held tester)
(See step 3).
*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.
2. Normal Mode: INSPECT DIAGNOSIS
(a) Check the MIL. (1) The MIL lights up when the ignition switch is turnedON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter
(See page BE−2 ).
(2) When the engine is started, the MIL should go off.
If the lamp remains on, the diagnosis system has
detected a malfunction or abnormality in the sys-
tem.
(b) Check the DTC.
NOTICE:
TOYOTA hand−held tester only:
When the diagnostic system is switched from the normal
mode to the check mode, it erases all DTCs and freeze
frame data recorded in the normal mode. So before switch-
ing modes, always check the DTCs and freeze frame data,
and note them down. (1) Prepare the OBD II scan tool (complying with SAEJ1978) or TOYOTA hand−held tester.
(2) Connect the OBD II scan tool or TOYOTA hand−
held tester to the DLC3 in the fuse box at the lower
left of the instrument panel.
(3) Turn the ignition switch ON and turn the OBD II scan
tool or TOYOTA hand−held tester switch ON.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010