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Suzuki SX4 Service Manual page 951

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Circuit Description
Operation (ON/OFF) of "EPS" warning light is controlled by P/S control module through combination meter.
If the P/S system is in good condition, P/S control module turns "EPS" warning light ON at the ignition switch ON, and
then turns it OFF at the engine start. If an abnormality in the system is detected, "EPS" warning light is turned ON
continuously by P/S control module. If P/S control module is disconnected, "EPS" warning light is not turned ON.
Troubleshooting
Step
1
"EPS" warning light power supply check
1) Turn ignition switch ON.
Do the other warning light come on?
2
Fuse check
1) Turn ignition switch OFF.
2) Remove and inspect circuit fuse for P/S control module.
Is fuse in good condition?
3
P/S control module power supply and ground circuit
check
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?
4
Combination meter power supply circuit check
1) Remove combination meter and disconnect combination
meter connector ("G241") with ignition switch turned
OFF.
2) Check for proper connection to the combination meter at
"G241-31" terminal.
3) If OK, check voltage between "G241-31" ("RED/BLK"
wire) terminal and body ground with ignition switch ON.
Is it 10 – 14 V?
5
"EPS" warning light circuit resistance check
1) Check for proper connection to the combination meter at
"G241-25" terminal and P/S control module at "E11-5"
terminal.
2) Check that "EPS warning light circuit" is as follows.
• Insulation resistance of "EPS warning light circuit"
wire is infinity between its terminal and each terminal
at combination meter connector.
• Wiring resistance of "EPS warning light circuit" wire is
less than 1 Ω.
• Insulation resistance of "EPS warning light circuit"
wire is infinity between its terminal and vehicle body
ground.
Is circuit in good condition?
6
"EPS" warning light circuit voltage check
1) Connect combination meter connector ("G241") with
ignition switch turned OFF.
2) Check for voltage between "E11-5" ("GRY" wire) terminal
and body ground with ignition switch ON.
Is it 10 – 14 V?
Action
Power Assisted Steering System:
Yes
Go to Step 2.
Reinstall fuse, and then
go to Step 3.
Go to Step 4.
Go to Step 5.
"GRY" wire circuit is
open.
Replace the P/S control
module.
6C-17
No
"GRN", "RED/BLK" wire
circuit or circuit fuse for
combination meter is
open or short to ground.
Check "GRN" wire
circuit for short to
ground.
If OK, replace fuse.
Repair or replace
defective circuit.
"RED/BLK" wire circuit
is open or short to
ground.
Go to Step 6.
Replace the
combination meter.

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