A01670
TOYOTA hand-held tester
DLC3
DI1KG-03
N09214
DI-608
-
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
762
Author:
Date:
2001 SIENNA (RM787U)
PRE-CHECK
1.
DIAGNOSIS SYSTEM
(a)
Description
ECM controls the function of immobiliser on this vehicle.
Data of the immobiliser or DTC can be read form DLC3 of
the vehicle. When a trouble occurs in immobiliser, MIL
does not light ON but DTC inspection is performed.
Therefore when there seems to be a trouble with immobi-
liser, use TOYOTA hand-held tester or SST to check and
troubleshoot it.
(b)
Inspect the DLC3.
The vehicle’s ECM uses ISO 9141-2 for communication.
The terminal arrangement of DLC3 complies with
SAEJ1962 and matches the ISO 9141-2 format.
Tester connection
condition
Specified condition
7 (Bus
Line) - 5 (Signal ground)
During communication
Pulse generation
4 (chassis Ground) - Body
Always
1
Ω
or less
5 (Signal Ground) - Body
Always
1
Ω
or less
16 (B+) - Body
Always
9 - 14 V
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of OBD ll scan tool or TOY-
OTA hand-held tester to DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still impossible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.
