Toyota Sequoia (2005). Manual — part 131
–
DIAGNOSTICS
ENGINE
DI–319
513
MONITOR RESULT
Refer to page
for detailed information.
The test value and test limit information are described as shown in the following table. Check the monitor
result and test values after performing the monitor drive pattern (refer to ”Confirmation Monitor”).
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 tools.
Secondary air injection (AIR) system
MID
TID
Scaling
Description of Test Value
Minimum Test Limit
Maximum Test Limit
$71
$E1
Multiply by 0.01
(g/s)
Test value of AIR amount insufficient
Minimum test limit
Maximum test limit
$71
$E2
Multiply by 0.01
(kPa)
Test value of AIR pump stuck ON
Minimum test limit
Maximum test limit
$71
$E3
Multiply by 0.01
(kPa)
Test value of AIR pump stuck OFF
Minimum test limit
Maximum test limit
$71
$E4
Multiply by 0.01
(kPa)
Test value of AIR control valve ON
Minimum test limit
Maximum test limit
$71
$E5
Multiply by 0.01
(kPa)
Test value of AIR control valve OFF
Minimum test limit
Maximum test limit
$71
$E6
Multiply by 0.01
(kPa)
Test value of AIR pressure change for
AIR valve
Minimum test limit
Maximum test limit
$71
$E7
Multiply by 0.01
(kPa)
Test value of AIR pressure change for
AIR VSV bank 1
Minimum test limit
Maximum test limit
$71
$E8
Multiply by 0.01
(kPa)
Test value of AIR pressure change for
AIR VSV bank 2
Minimum test limit
Maximum test limit
$71
$E9
Multiply by 0.01
(kPa)
Test value of AIR pressure pulsation for
AIR VSV when AIR pressure is low
Minimum test limit
Maximum test limit
A23551
Engine Room J/B
ECM
E4
E4
E4
E4
B–W
IA4
IA4
IA4
IA4
IA4
EB4
ED2
ED2
B–W
2H
2A
6
8
EFI Relay
2
1
2F
1
W–B
J5
J/C
A
ED
Battery
Air Pump
Air Switching Valve
Air Injection Driver
A43
A46
A41
5
G–R
G–R
J2
J/C
A
A
EFI No.2
EFI No.1
3
5
2
2D
1
B
4
F10
FL Block
5
B
L
A40
1
EN
B
B
B
1
1
2
2
W
W–L
W–L
W
3
4
2
6
A40
A41
A41
A41
A41
A41
1
2
4
3
1
8
EB
W–B
W–B
W–B
BATT
VP
VV
E
SIP
DI
SIV
+B
R–W
R–W
8
3
9
G–W
G–W
GR–L
GR–L
4
25
13
AID
AIRP
AIRV
A/PUMP
2
MREL
14
DI–320
–
DIAGNOSTICS
ENGINE
514
WIRING DIAGRAM
A23671
Port A
Port B
Air
A23672
Port A
Port B
Battery
Air
–
DIAGNOSTICS
ENGINE
DI–321
515
INSPECTION PROCEDURE
1
Check any other DTCs output (In addition to secondary air injection system
DTCs).
PREPARATION:
(a)
Connect hand–held tester to the DLC3.
(b)
Turn the ignition switch to ON and turn the tester ON.
(c)
Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
CHECK:
(a)
Read DTCs.
RESULT:
Display (DTC Output)
Proceed To
”P1441 and/or P1444” and P2440
A
P1441 and/or P1444
B
”P1441 and/or P1444 and/or P2440” and other DTCs
C
HINT:
If any DTCs other than P1441, P1444 or P2440 are output, troubleshoot those DTCs first.
B
Go to step 7.
C
).
A
2
Check air switching valve operation.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Remove the air switching valve.
CHECK:
Blow air into port A and check that air is not discharged from port
B.
OK:
Not discharged
CHECK:
(a)
Apply battery positive across the terminals.
(b)
Blow air into port A and check that air is discharged from
port B.
OK:
Discharged
B17440
A46
Air Switching Valve Connector
Wire Harness Side:
DI–322
–
DIAGNOSTICS
ENGINE
516
NG
Replace air switching valve and go to step 7.
OK
3
Check voltage between terminal 1 of air switching valve and body ground.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the A46 air switching valve connector.
(c)
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal 1 of the air switching
valve connector and body ground.
OK:
Standard:
Tester Connection
Specified Condition
A46–1 – Body ground
Below 1.0 V
NG
Go to step 4.
OK
Check for intermittent problems
(See page
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