AUTOMATIC TRANSMISSION (4 A/T) 7B-23
Electronic Control System Diagnosis
TCM has on-board diagnostic system (a system self-diagnosis
function). Investigate where the trouble is by referring to “DIAG-
NOSTIC FLOW TABLE” and “DTC TABLE” in this section.
Precautions in diagnosing troubles
[PRECAUTIONS IN IDENTIFYING DTC]
• For vehicle equipped with EGR valve, malfunction indicator
lamp (MIL) (1) comes on when TCM detects malfunction of
automatic transmission system.
• For vehicle equipped without EGR valve, malfunction indica-
tor lamp (MIL) (1) does not come on although TCM detects
malfunction of automatic transmission system.
• Using SUZUKI scan tool (3), diagnostic trouble code (DTC)
stored in TCM memory can be checked and cleared as well.
Before its use, be sure to read Operator’s (instruction) Man-
ual supplied with it carefully to have good understanding of
its functions and usage.
• Be sure to read “PRECAUTIONS FOR ELECTRICAL CIR-
CUIT SERVICE” in Section 0A before inspection and
observe what is written there.
• When replacing TCM with used one, all learned contents
which are stored in TCM memory should be erased after the
replacement referring to “LEARNING CONTROL INITIAL-
IZATION” in this section.
[INTERMITTENT TROUBLES] and [NOTES ON SYSTEM CIR-
CUIT INSPECTION]
Refer to Section 0A.
2. Data link connector (DLC)
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