Toyota Sequoia (2005). Manual — part 445
DID50–01
C00083
DLC3
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
DI–1575
1769
DIAGNOSIS SYSTEM
1.
DIAGNOSIS SYSTEM
(a)
Inspect the battery voltage.
Battery voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
(b)
Check the DLC3.
The transponder key ECU uses ISO 9141–2 for commu-
nication. The terminal arrangement of the DLC3 complies
with SAE J1962 and matches the ISO 9141–2 format.
DID51–01
A04550
CG
OP3
DLC3
1 2 3 4 5 6 7 8
9 1011 13 1516
12 14
TC
I28427
Security Indicator
Light
MIL
BR3904
Normal System Code
0.25 Sec.
0.25 Sec.
I02680
Diagnostic Trouble Code (Example Code 12, 99)
0.5 Sec. 0.5 Sec.
1.5 Sec. 2.5 Sec.
One Cycle
4.5 Sec.
Repeat
DI–1576
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
1770
DTC CHECK / CLEAR
1.
INSPECT DIAGNOSIS
(a)
Check the DTC using SST check wire.
(1)
Turn the ignition switch ON, but do not start the en-
gine.
(2)
When checking DTC 99: Using SST, connect termi-
nals 13 (TC) and 4 (CG) of the DLC3.
(3)
When checking codes except DTC 99: Using SST,
connect terminals 8 (OP3) and 4 (CG) of the DLC3.
SST
09843–18040
(4)
Read the DTC indicated by the number of times the
security indicator light or the MIL blinks.
HINT:
If no DTC is output, inspect the diagnosis circuits (OP3
and TC) and the security indicator light circuit (See page
).
If the system is operating normally, the light blinks twice
per second.
As an example, the blinking patterns of the normal system
code and trouble codes 12 and 99 are shown on the left
and below.
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
DI–1577
1771
(5)
When DTC ”99” is output, there is a problem with the
immobiliser. Start troubleshooting referring to the
PROBLEM SYMPTOMS TABLE.
(6)
After completing the check, disconnect terminals 8
(OP3) and 4 (CG), or terminals 13 (TC) and 4 (CG),
and turn off the display.
HINT:
If 2 or more trouble codes exist, indication will begin from the
lowest numbered code.
(b)
Clear the DTC.
(1)
When using diagnosis check wire:
Remove the ECU–B fuse and EFI No. 2 fuse from
the engine room J/B for 1 minute or more.
DI1AM–35
DI–1578
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
1772
DIAGNOSTIC TROUBLE CODE CHART
ECM DIAGNOSTIC TROUBLE CODE CHART (MIL)
DTC No.
(See page)
Detection Item
Trouble Area
99
(
)
Engine immobiliser system malfunction
Transponder key ECU
ECM
Wire harness
TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART (SECURITY INDICATOR LIGHT)
DTC No.
(See page)
Detection Item
Trouble Area
11
(
)
Code 11 is not output
Unlock warning switch
Transponder key ECU
Wire harness
12
(
)
Code 12 is not output
Driver door courtesy lamp switch
Transponder key ECU
Body ECU
Wire harness
13
(
)
Code 13 is not output
Ignition switch
Transponder key ECU
Wire harness
21, 22
(
)
Code 21 or 22 is not output
Key
Transponder key ECU
Transponder key amplifier with key coil
Wire harness
31, 35, 36, 37
(
)
Code 31, 35, 36 or 37 is output
Key
32, 33
(
)
Code 32 or 33 is output
Key
Transponder key ECU
Wire harness
34
Code 34 is output
Transponder key ECU has no memory space to register anoth-
er key code
HINT:
DTCs 11, 12, 13, 21 and 22 are normal codes.
As for the normal codes, if the corresponding DTC is not output while operating any of the components
listed under ”Trouble Area”, perform the inspection described in the reference pages.
DTCs 31, 32, 33, 34, 35, 36, 37 and 99 are abnormal codes.
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