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5A-1 Automatic Transmission/Transaxle:
Automatic Transmission/Transaxle
Transmission / Transaxle
Precautions in Diagnosing Trouble
• Do not disconnect couplers from TCM, battery cable
from battery, TCM ground wire harness from engine or
main fuse before checking the diagnostic information
(DTC, freeze frame data, etc.) stored in TCM memory.
Such disconnection will clear memorized information
in TCM memory.
• For E-OBD model, diagnostic information stored in
TCM memory can be cleared as well as checked by
using SUZUKI scan tool or OBD generic scan tool.
Before using scan tool, read its Operator's
(Instruction) Manual carefully to have good
understanding as to what functions are available and
how to use it.
It is indistinguishable which module turns on MIL
because not only ECM but also TCM turns on MIL.
Therefore, check both ECM and TCM for DTC when
MIL lights on.
When checking TCM for DTC, keep in mind that DTC
is displayed on the scan tool as follows depending on
the scan tool used.
– SUZUKI scan tool displays DTC detected by TCM.
– OBD generic scan tool displays DTC detected by
each of ECM and TCM simultaneously.
• For non-E-OBD model, using SUZUKI scan tool the
diagnostic information stored in TCM memory can be
checked and cleared as well. Before its use, be sure
to read Operator's Manual supplied with it carefully to
have good understanding of its functions and usage.
• Be sure to read "Precautions for Electrical Circuit
Service in Section 00" before inspection and observe
what is written there.
Precautions
• TCM and/or ECM replacement:
S6JB0A5100001
When substituting a known-good TCM and/or ECM,
check for the following conditions.
Neglecting this check may result in damage to a good
TCM and/or ECM.
– All relays and actuators have resistance of
specified value.
– MAF sensor, Manifold absolute pressure (MAP)
sensor, TP sensor and fuel tank pressure sensor
are in good condition. Also, the power circuit of
these sensors is not shorted to the ground.
• Communication of ECUs, ECM, TCM, BCM,
combination meter, 4WD control module (if equipped),
ABS/ESP® control module, keyless start control
module (if equipped), steering angle sensor (if
equipped) and DLC is established by CAN (controller
Area Network). For more detail of CAN
communication, refer to "CAN Communication
System Description". Therefore, handle CAN
communication line with care referring to "Precaution
for CAN Communication System in Section 00".
General Service Procedure Information
When repairing automatic transmission, it is necessary
to conduct the on-vehicle test to investigate where the
cause of the trouble lies first.
Then whether overhaul should be done or not is
determined. If the transmission is disassembled without
such preliminary procedure, not only the cause of the
trouble would be unknown, but also a secondary trouble
may occur and often time would be wasted.
S6JB0A5100002
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