1986 TOYOTA LAND CRUISER display

A20316
Vehicle speed
40 km/h
(25 mph)
IG SW OFFOnce
40 sec.
or more
60 sec.
or more10 sec.Twice
40 sec.
or more12 times
40 sec.
or more
10 sec. 10 sec.
(
1)(
3)
(
4)
Idling(
2)(
3)
(
4)(
3)
(
4)
- DIAGNOSTICSENGINE
DI-141
334 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Rear HO2S element monitor
If all the values ($81, $84, $85 and $87) are out of the standard values, the ECM interprets this as a malfunc-
tion.
TEST IDDescription of TEST DATAConversion FactorUnit
$81
Percentage of monitoring time
when the HO2S voltage is less
than 0.05 V
Multiply 0.3906%
$84
Percentage of monitoring time
when the HO2S voltage is more
than 0.7 V
Multiply 0.3906%
$85Time when the HO2S voltage is
0.45 V or moreMultiply 0.2621sec.
$87
Percentage of monitoring time
when the HO2S voltage is 0.45 V
or more
Multiply 0.3906%
WIRING DIAGRAM
Refer to DTC P0031 on page DI-49.
CONFIRMATION DRIVING PATTERN
1. Connect the hand-held tester to the DLC3. (
1)
2. Switch the hand-held tester from the normal mode to the check mode (See page DI-3). (
1)
3. Start the engine and let the engine idle for 60 seconds or more. (
2)
4. Drive the vehicle at 40 km/h (25 mph) or more for 40 seconds or more. (
3)
5. Let the engine idle for 10 seconds or more. (
4)
6. Perform steps 4. and 5. for 12 times.
HINT:
If a malfunction exists, the MIL will light up on the multi-information display during step 6.
NOTICE:
If the conditions in this test are not strictly followed, a malfunction detection will not occur. If you do
not have a hand-held tester, turn the ignition switch OFF after performing steps from 3 to 6, then per-
form steps from 3 to 6 again.

- DIAGNOSTICSENGINE
DI-143
336 Author
: Date
:
2004 LAND CRUISER (RM1071U)
The following A/F CONTROL procedure enables the technician to check and graph the voltage output of
the heated oxygen sensors.
For displaying the graph indication, first enter ºACTIVE TEST / A/F CONTROL / USER DATA,º then select
º02S B1S1and O2S B1S2º by pressing ºYESº button, and push ºENTERº button before pressing ºF4º button.
HINT:
If different DTCs that are related to different system are output simultaneously while terminal E2 is used
as a ground terminal, terminal E2 may be open.
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-
ing whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio
was lean or rich, etc. at the time of the malfunction.
1 Are there any other codes (besides DTC P0136 or P0156) being output?
PREPARATION:
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester or OBD II scan tool main switch ON.
(c) When using hand-held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTC using the hand-held tester or the OBD ll scan tool.
RESULT:
Display (DTC Output)Proceed to
P0136A
ºP0136º and other DTCsB
HINT:
If any other codes besides P0136 are output, perform the troubleshooting for those DTCs first.
B Go to relevant DTC chart (See page DI-36).
A

- DIAGNOSTICSENGINE
DI-151
344 Author
: Date
:
2004 LAND CRUISER (RM1071U)
The following A/F CONTROL procedure enables the technician to check and graph the voltage output of
the heated oxygen sensors (sensor 1 and 2).
For displaying the graph indication, enter ºACTIVE TEST / A/F CONTROL / USER DATAº then select ºO2S
B1S1 and O2S B1S2º by pressing ºYESº button and push ºENTERº button before pressing ºF4º button.
HINT:
If different DTCs related to different systems that have terminal E2 as the ground terminal, terminal
E2 may be open.
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determin-
ing whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio
was lean or rich, etc. at the time of the malfunction.
A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air fuel mix-
ture. Check for conditions that would cause the engine to run rich.
A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mix-
ture. Check for conditions that would cause the engine to run lean.
1 Check air induction system (See page SF-1).
CHECK:
Check the air induction system for vacuum leaks.
NG Repair or replace air induction system.
OK
2 Check connection of PCV piping.
NG Repair or replace PCV piping.
OK
3 Check injector injection (See page SF-24).
NG Replace injector.
OK

DI-172
- DIAGNOSTICSENGINE
365 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CONFIRMATION DRIVING PATTERN
(a) Connect the hand-held tester to the DLC3.
(b) Record DTC and the freeze frame data.
(c) Use the hand-held tester to set to the check mode (See page DI-3).
(d) Read the value on the misfire counter for each cylinder when idling. If the value is displayed on the
misfire counter, skip the following procedure of confirmation driving.
(e) Drive the vehicle several times with the engine speed, load and its surrounding range shown with EN-
GINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the DATA LIST.
If you have no hand-held tester, turn the ignition switch OFF after the symptom is simulated once. Then re-
peat the simulation process again.
HINT:
In order to memorize the DTC of misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in
the DATA LIST for the following period of time. Take care not to turn the ignition switch OFF. Turning the
ignition switch OFF switches the diagnosis system from check mode to normal mode. So all DTCs, etc., are
erased.
Engine SpeedTime
Idling3 minutes 30 seconds or more
1,000 rpm3 minutes or more
2,000 rpm1 minute 30 seconds or more
3,000 rpm1 minute or more
(f) Check if there is misfire and DTC and the freeze frame data. Record the DTC's, freeze frame data and
misfire counter data.
(g) Turn the ignition switch OFF and wait at least 5 seconds.
INSPECTION PROCEDURE
HINT:

If DTCs besides misfire DTCs are memorized simultaneously, troubleshoot the non-misfire DTCs first.

If the misfire does not occur when the vehicle is brought to the workshop, the misfire can be confirmed
by reproducing the condition of the freeze frame data. Also, after finishing the repair, confirm that there
is no misfire (See confirmation driving pattern).

On 6 and 8 cylinder engines, misfiring cylinder identification is disabled at high engine speed and only
a general misfire fault code P0300 is stored instead of a cylinder specific misfire fault code (P0301 to
P0308).
If the misfire starts in a high engine speed area or the misfire occurs only in a high engine speed area,
only code P0300 may be stored.
When only a general misfire fault code like P0300 is stored:

Erase the general misfire fault code from the hand-held tester or OBD II scan tool.

Start the engine and drive the confirmation patten.

Read the value of the misfire ratio for each cylinder. Or read the DTC.

Perform repairs on the cylinder that has a high misfire ratio. Or repair the cylinder indicated by the DTC.

After finishing repairs, drive the confirmation pattern again and confirm that no misfire occurs.

When either of SHORT FT #1, LONG FT #1, SHORT FT #2 or LONG FT #2 in the freeze frame data
is over the range of ±20 %, there is a possibility that the air-fuel ratio is becoming RICH (-20 % or
less) or LEAN (+20 % or more).

When COOLANT TEMP in the freeze frame data is less than 80°C (176°F), there is a possibility of
misfire only during engine warm-up.

If the misfire cannot be reproduced, the following reasons may apply: 1) the vehicle has low fuel, 2)
improper fuel is being used, and 3) the ignition plug is contaminated.

- DIAGNOSTICSENGINE
DI-173
366 Author
: Date
:
2004 LAND CRUISER (RM1071U)

Be sure to check the value on the misfire counter after the repair.
1 Are there any other codes (besides DTC P0300, P0301, P0302, P0303, P0304
P0305, P0306, P0307 or P0308) being output?
PREPARATION:
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester or OBD II scan tool main switch ON.
(c) When using hand-held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTC using hand-held tester or the OBD II scan tool.
RESULT:
Display (DTC Output)Proceed to
ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or
P0308ºA
ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or
P0308º and other DTCsB
HINT:
If any other codes besides ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308º are
output, perform the troubleshooting for those DTC.
B Go to relevant DTC chart (See page DI-36).
A
2 Check wire harness, connector and vacuum hose in engine room.
CHECK:
(a) Check the connection conditions of the wire harness and connector.
(b) Check for the disconnection, piping and brake of the vacuum hose.
NG Repair or replace, then confirm that there is no
misfire (See confirmation driving pattern).
OK
3 Check connection of PCV piping.
NG Repair or replace PCV piping.
OK

DI-184
- DIAGNOSTICSENGINE
377 Author
: Date
:
2004 LAND CRUISER (RM1071U)
17 Check intake air temperature and mass air flow rate.
PREPARATION:
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
Check the intake air temperature.
(1) Select the item ºDIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/INTAKE AIRº.
(2) Read its value displayed on the hand-held tester or the OBD II scan tool.
OK:
Equivalent to ambient temperature
CHECK:
Check the air flow rate.
(1) Select the item ºDIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/MAFº.
(2) Read its value displayed on the hand-held tester or the OBD II scan tool.
OK:
ConditionAir Flow Rate (gm/s)
Ignition switch ON (do not start engine)0
Idling4 to 6
Running without load (2,500 rpm)13 to 20
Idling to quickly acceleratingAir flow rate fluctuates
NG Replace mass air flow meter.
OK

DI-202
- DIAGNOSTICSENGINE
395 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0351 Igniter Coil ºAº Primary/Secondary Circuit
DTC P0352 Igniter Coil ºBº Primary/Secondary Circuit
DTC P0353 Igniter Coil ºCº Primary/Secondary Circuit
DTC P0354 Igniter Coil ºDº Primary/Secondary Circuit
DTC P0355 Igniter Coil ºEº Primary/Secondary Circuit
DTC P0356 Igniter Coil ºFº Primary/Secondary Circuit
DTC P0357 Igniter Coil ºGº Primary/Secondary Circuit
DTC P0358 Igniter Coil ºHº Primary/Secondary Circuit
HINT:

These DTCs indicate a malfunction related to primary circuit.

If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.

If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.

If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.

If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.

If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.

If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.

If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.

If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.
DIC2F-01

- DIAGNOSTICSENGINE
DI-219
412 Author
: Date
:
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, as well as other data from the time when a malfunction occurred.
1 Are there any other codes (besides DTC P0420 or P0430) being output?
PREPARATION:
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester or OBD II scan tool main switch ON.
(c) When using hand-held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTC using the hand-held tester or the OBD II scan tool.
RESULT:
Display (DTC Output)Proceed to
ºP0420 and/or P0430ºA
ºP0420 or P0430º and other DTCsB
HINT:
If any other codes besides ºP0420 and/or P0430º are output, perform the troubleshooting for those DTCs
first.
B Go to relevant DTC chart (See page DI-36).
A
2 Check gas leakage on exhaust system.
NG Repair or replace exhaust gas leakage point.
OK
3 Check heated oxygen sensor (bank 1, 2 sensor 1) (See page SF-57).
HINT:
Refer to the hint following the end of this flowchart.
NG Replace heated oxygen sensor.
OK