Suzuki SY413 Service Manual page 1800

5B-16 ANTILOCK BRAKE SYSTEM (ABS)
TABLE – A ABS WARNING LAMP CIRCUIT CHECK – LAMP DOES NOT
COME "ON" AT IGNITION SWITCH ON
CIRCUIT DESCRIPTION
Operation (ON/OFF) of the ABS warning lamp is controlled by the ABS control module and ABS lamp relay.
If the Antilock brake system is in good condition, the ABS control module turns the ABS warning lamp ON at the
ignition switch ON, keeps it ON for 2 seconds only and then turns it OFF. If an abnormality in the system is detected,
the lamp is turned ON by ABS control module. Also, it is turned ON by ABS warning lamp relay when the connector
of the ABS control module was disconnected.
INSPECTION
STEP
1 1) Turn ignition switch ON.
Do other warning lamp come ON?
2 1) Disconnect ABS hydraulic unit / control module connec-
tor.
Does ABS warning lamp light with ignition switch ON?
3 1) Connect "BLK" wire terminal of ABS warning lamp
relay to ground using service wire.
Does ABS warning lamp light with ignition switch ON?
4 1) Remove combination meter.
Is bulb of ABS warning lamp in good condition?
5 Is IG fuse in good condition?
ACTION
-1. Main fuse
-2. Ignition switch
-3. Circuit fuse for IG
-4. ABS warning lamp
-5. ABS hydraulic unit / control
module assembly
5-1. Fail-safe relay
5-2. To solenoid valves and
pump motor relay
(ABS hydraulic unit)
-6. Diagnosis connector
-7. ABS hydraulic unit/
control module connector
of harness
-8. ABS warning lamp relay
YES
Go to step 2. Go to step 5.
Replace ABS hydrau- Go to step 3.
lic unit / control mod-
ule assembly.
"BLK" circuit open. Go to step 4.
"BLK/ ORG" circuit Replace bulb.
shorted to ground.
If OK, replace ABS
warning lamp relay.
Open in "RED / BLU" Repair and replace.
wire to combination
meter or poor con-
nection.
NO