Suzuki Swift Sport 2004 Service & Repair Manual page 896

6C-14 Power Assisted Steering System:
Troubleshooting
Step
1 Was "EPS System Check" performed?
2 1) Make sure that SUZUKI scan tool is free from
malfunction and that correct program card (software) for
P/S system is used.
2) Turn ignition switch to OFF position.
3) Check proper connection of SUZUKI scan tool to DLC.
Is connection in good condition?
3 1) Check if communication is possible by making
communication with other controllers (ECM, BCM, ABS
or SDM) or other vehicles.
Is it possible to communicate with the other controllers?
4 1) Check power supply circuit and ground circuit for P/S
control module referring to "P/S Control Module Power
Supply and Ground Circuit Check".
Is check result in good condition?
5 1) With ignition switch turned OFF, disconnect "E52"
connector from P/S control module and check for
terminal to P/S control module connector.
2) If connections are OK, check that "Serial data circuit" is
as following.
• Insulation resistance of "Serial data circuit" wire is
infinity between its terminal and other terminals at P/S
control module connector.
• Wiring resistance of "Serial data circuit" wire is less
than 1 Ω.
• Insulation resistance of "Serial data circuit" wire is
infinity between its terminal and vehicle body ground.
Is circuit in good condition?
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Substitute a known-
good P/S control
module and recheck.
No
Go to "EPS System
Check".
Connect SUZUKI scan
tool to DLC properly.
Repair open in common
section of "serial data
circuit" ("PPL/WHT" wire
circuit) used by all
controllers or short to
ground or power circuit
which has occurred
somewhere in serial
data circuit ("PPL/WHT"
wire circuit).
Repair or replace
defective circuit.
Repair or replace
defective circuit.