Suzuki GRAND VITARA JB416, Service Manual

Page: 237 / 474

ABS: 4E-14
Troubleshooting
ABS Warning Lamp Comes ON Steady
S5JB0E4504009
Wiring Diagram
Refer to “ABS Warning Lamp Does Not Come ON at Ignition Switch ON: ”.
Circuit Description
Operation (ON/OFF) of ABS warning lamp is controlled by ABS (ESP
®
) control module through lamp driver module in
combination meter.
If the Antilock brake system is in good condition, ABS (ESP
®
) control module turns ABS warning lamp ON at the
ignition switch ON, keeps it ON for 2 seconds and then turns it OFF. If an abnormality in the system is detected, ABS
warning lamp is turned ON continuously by ABS (ESP
®
) control module. Also, it is turned ON continuously by lamp
driver module when the connector of ABS (ESP
®
) control module is disconnected.
Step Action Yes No
1 1) Turn ignition switch to ON position.
Do other warning lamps come ON?
Go to Step 2. Go to Step 3.
2 1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch to ON position and check DTC.
Is there DTC U1073?
Go to “DTC U1073:
Control Module
Communication Bus
Off: ”. Substitute a known-
good combination meter
and recheck. If ABS
warning lamp remains
OFF, substitute a
known-good ABS
(ESP
®
) hydraulic unit /
control module
assembly and recheck.
3 Is Circuit fuse for combination meter in good condition? Go to Step 4. Replace fuse and check
for short circuit to
ground.
4 Check CAN communication circuit between combination
meter and ABS (ESP
®
) control module referring to “DTC
U1073: Control Module Communication Bus Off: ”.
Is CAN communication circuit in good condition?
Go to Step 5. Repair or replace.
5 1) Remove combination meter with ignition switch turned
OFF.
2) Check for proper connection to “PPL/RED” and “BLK”
wire of combination meter connector.
3) If OK, turn ON ignition switch and measure voltage at
“PPL/RED” wire of combination meter connector and
vehicle body ground.
Is it 10 – 14 V?
Go to Step 6. Repair power supply
circuit for combination
meter.
6 1) Measure resistance between “BLK” wire of combination
meter connector and vehicle body ground.
Is resistance less than 2
Ω
?
Replace combination
meter. “BLK” circuit open or
high resistance.