Suzuki 2000 Grand Vitara SQ625 Service Manual page 19

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MALFUNCTION INDICATOR LAMP (MIL) CHECK
1) Turn ON ignition switch (but the engine at stop) and check that
MIL lights.
If MIL does not light up or dims, go to "Diagnostic Flow Table A-1"
for troubleshooting.
If MIL flushes, go to "Diagnostic Flow Table A-3" (vehicle with
monitor connector).
2) Start engine and check that MIL turns OFF.
If MIL remains ON, and no DTC is stored in ECM (PCM), go to
"Diagnostic Flow Table A-2" for troubleshooting.
DIAGNOSTIC TROUBLE CODE (DTC) CHECK
[Using SUZUKI scan tool]
1) Prepare generic scan tool or SUZUKI scan tool (Tech-1).
2) Connect it to data link connector (DLC) located on underside of
instrument panel at driver's seat side.
Special Tool
(A): SUZUKI scan tool
(B): Mass storage cartridge
(C): 16/14 pin DLC cable (OBD-II adapter cable)
3) Turn ignition switch ON and confirm that MIL lights.
4) Read DTC, pending DTC and freeze frame data according to
instructions displayed on scan tool and print them or write them
down. Refer to scan tool operator's manual for further details.
If communication between scan tool and ECM (PCM) is not pos-
sible, check if scan tool is communicable by connecting it to
ECM (PCM) in another car. If communication is possible in this
case, scan tool is in good condition. Then check data link con-
nector and serial data line (circuit) in the car with which commu-
nication was not possible.
5) After completing the check, turn ignition switch off and discon-
nect scan tool from data link connector.
[Not using SUZUKI scan tool] (vehicle with monitor
connector only)
1) Check malfunction indicator lamp referring to "Malfunction Indi-
cator Lamp Check" in this section.
2) With the ignition switch OFF position, disconnect SUZUKI scan
tool if connected and using service wire (1), ground diagnosis
switch terminal (2) in monitor connector (3).
3) With the ignition switch ON position and leaving engine OFF,
read DTC from flashing pattern of malfunction indicator lamp.
Refer to "Diagnostic Trouble Code Table".
If lamp remains ON or does not flash, go to "Diagnostic Flow
Table A-4".
NOTE:
D If abnormality or malfunction lies in two or more areas,
malfunction indicator lamp indicates applicable codes
three times each.
And flashing of these codes is repeated as long as diag-
nosis terminal is grounded and ignition switch is held at
ON position.
D Take a note of diagnostic trouble code indicated first.
4) After completing the check, turn the ignition switch OFF position
and disconnect service wire from monitor coupler.
ENGINE DIAGNOSIS (G16 / J20 ENGINES) 6-15