Suzuki Wagon R Manual page 137

3B1-16 ELECTRICAL POWER STEERING (EPS) SYSTEM (IF EQUIPPED)
DIAGNOSTIC FLOW TABLE
STEP
1 Was "SYSTEM CHECK FLOW TABLE"
performed?
2 1) Make sure that SUZUKI scan tool is free from
malfunction and correct cartridge 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 trying
communication with other controller
(ECM/PCM, ABS hydraulic unit/control
module assembly (if equipped) or SDM).
Is it possible to communicate with other controller?
4 1) With ignition switch is OFF position, disconnect
8-pin ("A") connector from P/S control module.
2) Check proper connection at "A8" ("W/R" wire)
terminal for serial data circuit.
3) If OK, then check resistance between "A8"
("W /R" wire) terminal and "W/R" wire terminal
for serial data circuit in DLC.
Is resistance 1 Ω or less?
Fig. for Step 4
1. DLC
2. "W / R" wire terminal
ACTION YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a
known-good P/S
control module and
recheck.
NO
Go to "SYSTEM
CHECK FLOW
TABLE" in this section.
Properly connect
SUZUKI scan tool to
DLC.
Repair open in
common section of
serial data circuit
("W /R" wire circuit)
used by all controllers
or short to ground or
power circuit which
has occurred
somewhere in serial
data circuit ("W/R"
wire circuit).
Repair high resistance
or open in "W/R" wire
circuit for P/S system.