Suzuki sq-416-420-625 Service Manual page 357

5E1-16 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
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 driver mod-
ule.
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 lamp driver module 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
connector.
Does ABS warning lamp light with ignition switch ON?
3 1) Remove combination meter.
Is bulb of ABS warning lamp in good condition?
4 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
(Black connector)
6-1. Diag. switch terminal
6-2. Diag. ground terminal
-7. Combination meter
7-1. ABS lamp driver module
-8. ABS hydraulic unit/
control module connector
of harness
-9. EBD warning lamp
(Brake warning lamp)
-10. Parking brake switch
-11. Brake fluid level switch
YES
Go to step 2.
Replace ABS
hydraulic unit/control
module assembly.
"Bl/O" circuit shorted
to ground. If OK,
replace ABS
warning circuit (lamp
driver module).
Open in "B/W" wire to
combination meter or
poor connection.
NO
Go to step 4.
Go to step 3.
Replace bulb.
Repair and
replace.