TOYOTA SEQUOIA 2001 Service Repair Manual

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Input a new VIN
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press [NO] key.
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Press [RIGHT]/[LEFT] to shift
the cursor right/left.
Press [UP]/[DOWN] to
increase/decrease value.
Or, input digit with the 10 key.
PRESS [ENTER]CONFIRMATION
PRESS [ENTER] Vehicle is stopped.
New Registration
[ENTER]
[ENTER]
PRESS [ENTER]
Communication Error
[ENTER]
COMMUNICATION ERROR
PRESS [EXIT] Turn IG OFF, then ON.
VIN input method
The following VIN has been
written correctly.
The DTCs have been erased
correctly.
To Menu Screen To Menu Screen
[EXIT] Input Instructions
Engine is not running.
± DIAGNOSTICSENGINE
DI±17
211 Author: Date:
2005 SEQUOIA (RM1146U)

DID7U±01
A21570
DI±18
± DIAGNOSTICSENGINE
212 Author: Date:
2005 SEQUOIA (RM1146U)
LIST OF DISABLE A MONITOR
HINT:
This table indicates ECM monitoring status for the items in the upper columns if the DTCs in each line on
the left are being set.
As for the ºXº mark, when the DTC on the left is stored, detection of the DTC in the upper column is not per-
formed.

A21571
± DIAGNOSTICSENGINE
DI±19
213 Author: Date:
2005 SEQUOIA (RM1146U)

A21572
DI±20
± DIAGNOSTICSENGINE
214 Author: Date:
2005 SEQUOIA (RM1146U)

A21573
± DIAGNOSTICSENGINE
DI±21
215 Author: Date:
2005 SEQUOIA (RM1146U)

A21575
DI±22
± DIAGNOSTICSENGINE
216 Author: Date:
2005 SEQUOIA (RM1146U)

A21576
± DIAGNOSTICSENGINE
DI±23
217 Author: Date:
2005 SEQUOIA (RM1146U)

DID7V±01
01 BANK 1 ± SENSOR 1O2 SENSOR TEST
02 BANK 1 ± SENSOR 2
03 BANK 2 ± SENSOR 1
04 BANK 2 ± SENSOR 2
A21190
O2S TEST RESULT Screen DI±24
± DIAGNOSTICSENGINE
218 Author: Date:
2005 SEQUOIA (RM1146U)
O2S TEST RESULT
INTRODUCTION
The O2S TEST RESULT refers to the results of the engine con-
trol module (ECM) when it monitors the oxygen sensor (O2S),
and it can be read using the hand±held tester or the generic
OBD II scan tool. Based on this, you can find the O2S's condi-
tions.
The ECM monitors the O2S in the various items. You can read
the monitor result (TEST DATA) of each monitor item using the
O2S TEST RESULT. However, the output value of the TEST
DATA is the latest ºsnapshotº value that is taken after monitor-
ing and therefore it is not dynamic.
In this repair manual, the description of the O2S TEST RESULT
(for O2S related DTCs) are written in a table.
This table consists of 5 items:
(1) TEST ID (a code applied to each TEST DATA)
(2) Description of TEST DATA
(3) Conversion Factor (When Conversion Factor has a
value written in the table, multiply the TEST DATA
value appearing on the scan tool by the Conversion
Factor value. The result will be the required value.)
(4) Unit
(5) Standard Value
If the TEST DATA value appearing on the scan tool is out of the
standard value, the O2S is malfunctioning. If it is within the stan-
dard value, the O2S is functioning normally. However, if the val-
ue is on the borderline of the standard value, the O2S may mal-
function very soon.
HOW TO READ O2S TEST RESULT USING HAND±HELD
TESTER
(a) Connect the hand±held tester to the DLC3.
(b) On the tester screen, select the following menus: DIAG-
NOSIS / CARB OBDII / O2S TEST RESULT. A list of the
O2S equipped on the vehicle will be displayed.

LOW SW V . . . . . . 0.400 V
HIGH SW V . . . . . .0.550 V
MIN O2S V . . . . . . 0.035 V
MAX O2S V . . . . . 0.835 V
Time $81 . . . . . . . . . . . 17
Time $84 . . . . . . . . . . . 84
Time $85 . . . . . . . . . . . 79
A21191
TEST DATA Screen
± DIAGNOSTICSENGINE
DI±25
219 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Select the desired O2S and press ENTER. The following
screen will appear.
(d) Press HELP and
simultaneously. More information will
appear.
(e) Example:
(1) The hand±held tester displays º17º as a value of the
ºTIME $81º (see the illustration on the left).
(2) Find the Conversion Factor value of ºTIME $81º in
the O2S TEST RESULT chart below. 0.3906 is spe-
cified for $81 in this chart.
(3) Multiply º17º in step (1) by 0.3906 (Conversion Fac-
tor) in the step (2).
17 x 0.3906 = 6.6 %
(4) If the answer is within the standard value, the ºTIME
$81º can be confirmed to be normal.
O2S TEST RESULT Chart
TEST IDDescription of TEST DATAConversion FactorUnitStandard Value
$81
Percentage of monitoring time
when the HO2S voltage is less
than 0.05V
Multiply 0.3906%Within 60 %

DID7W±01
MID
TIDScaling Test Result Minimum Test Limit Maximum Test Limit
$E1 $E8ECT sensor output when estimated
ECT reached to malfunction criteria Multiply by 0.1 [°C]
Malfunction criteria Maximum test limit
DI±26
± DIAGNOSTICSENGINE
220 Author: Date:
2005 SEQUOIA (RM1146U)
CHECKING MONITOR STATUS
1. OUTLINE
The monitor results and the test values can be checked with the OBD II scan tool.
The engine control module (ECM) monitors the emissions±related components as the thermostat, catalyst
converter and evaporative emissions (EVAP), and determines whether they are functioning normally or not.
When finished and monitoring, the ECM stores the monitor results and the test values.
The monitor result indicates whether the component is functioning normally or not. The test value is the value
that was used to determine the monitor result. If the test value is outside the test limit (malfunction criterion),
the ECM determines the component is malfunctioning. Some emissions±related components have multiple
test values to determine monitor result. If one of these test values is outside test limit, the ECM determines
the component is determine monitor result. If one of these test values is outside test limit, the ECM deter-
mines the components is malfunctioning.
2. DESCRIPTION
The test value and test limit information are described as shown in the following table. This information is
included under ºMONITOR RESULTº in the emissions±related DTC sections.
Thermostat:

MID (Monitor Identification Data) is assigned to each emissions±related component.

TID (Test Identification Data) is assigned to each test value.

Scaling is used to calculate the test value indicated on generic OBD II scan tools.
3. PROCEDURE (USING HAND±HELD TESTER)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch and hand±held tester ON.
(c) Clear DTCs.
(d) Allow the vehicle to drive, in accordance with the applicable drive pattern described in the READINESS
MONITOR DRIVE PATTERN section (see page DI±27).
(e) Check the monitor result. Select the hand±held tester menus: DIAGNOSIS/ENHANCED OBDII/MON-
ITOR INFO/MONITOR STATUS. The monitor result appears after the component name.

AVAIL indicates the component has not been monitored yet.

COMPL indicates the component is functioning normally.

INCMPL indicates the component is malfunctioning.
(f) Check the test value(s). Select the hand±held tester menus: DIAGNOSIS/ENHANCED OBDII/MON-
ITOR INFO/TEST RESULT.
(g) Select the component and press ENTER. If the monitor result has been COMPL or INCMPL, the accu-
racy test value appears.
(h) Compare the test value with the test limits, MIN and MAX.

If the test value is outside of the test limit, the component is malfunctioning.

If the test value is on the borderline of the test limit, a malfunction is concealed in the component.
HINT:
The monitor result might on rare occasions be COMPL even if the malfunction indicator lamp (MIL) is illumi-
nated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an inter-
mittent problem.