Precaution In Diagnosing Trouble - Suzuki Baleno Manual

PRECAUTION IN DIAGNOSING TROUBLE

D Don't disconnect couplers form TCM and/or ECM, battery cable from battery, TCM and/or ECM ground wire har-
ness from engine or main fuse before checking the diagnosis information (DTC, freeze frame data, etc.) stored
in TCM and/or ECM memory.
Such disconnection will clear memorized information in TCM and/or ECM memory.
D Using SUZUKI scan tool (Tech-1) the diagnostic information stored in ECM memory can be checked and cleared
as well. Before its use, be sure to read Operator's (instruction) Manual supplied with it carefully to have good
understanding of its functions and usage.
D DTC stored in TCM can not be cleared by using ECM application of SUZUKI scan tool (Tech-1) in mass storage
cartridge. Be sure to follow "DIAGNOSTIC TROUBLE CODE CLEARANCE" in this section when cleaning it.
D Priorities for diagnosing troubles
If two or more diagnostic trouble codes (DTCs) are stored, proceed to flow table (chart) of DTC which was de-
tected earliest in order and follow instruction in that table (chart).
If no instructions are given, troubleshoot diagnostic trouble codes according to the following priorities.
1. Diagnostic trouble codes (DTCs) other than DTC P0171/P0172 (Fuel system too lean/too rich), DTC
P0300/P0301/P0302/P0303/P0304 (Misfire detected) and DTC P0400 (EGR flow malfunction)
2. DTC P0171/P0172 (Fuel system too lean/too rich) and DTC P0400 (EGR flow malfunction)
3. DTC P0300/P0301/P0302/P0303/P0304 (Misfire detected)
D Be sure to read "PRECAUTION FOR ELECTRICAL CIRCUIT SERVICE" in Section 0A before inspection and
observe what is written there.
D TCM and/or ECM replacement
When substituting a known-good TCM and/or ECM, check for following conditions.
Neglecting this check may result in damage to good TCM and/or ECM.
– All relays and actuators have resistance of specified value.
– MAF sensor, TP sensor and fuel tank pressure sensor (if equipped) are in good condition. Also, the power
circuit of these sensors is not shorted to the ground.
AUTOMATIC TRANSMISSION 7B1-21