YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-29
1. Ignition switch
2. ABS hydraulic unit/
control module assembly
3. ABS hydraulic unit/
control module connector
of harness
2
1. ABS hydraulic
unit/ control
module connector
DTC 63 (DTC C1063) – ABS FAIL-SAFE RELAY CIRCUIT
DESCRIPTION
The ABS control module monitors the voltage at the terminal of the solenoid circuit constantly with the ignition
switch turned ON. Also, immediately after the ignition switch is turned “ON”, perform an initial check as follows.
Switch the fail-safe relay in the order of ON OFF ON and check if the voltage at 6 solenoid circuit terminals
changes to High Low High. If anything faulty is found in the initial check and when the voltage at all solenoid
circuit terminals is low with the ignition switch turned ON and ABS not operated, this DTC will be set.
INSPECTION
STEP ACTION YES NO
1 Check battery voltage. Is it about 11 V or higher? Go to step 2. Check charging
system referring
to “CHARGING
SYSTEM” section.
2 Check ABS main fuse and connection. Is it in good
condition?
Go to step 3. Repair and/or
replace fuse.
3 1) Ignition switch OFF.
2) Disconnect ABS hydraulic unit/control module
connector. (See Fig. 1)
3) Check proper connection to ABS hydraulic unit/
control module at terminal “A11”.
4) If OK, then measure voltage between connector
terminal “A11”, and body ground.
Is it 10 – 14 V?
Substitute a
known-good ABS
hydraulic unit/
control module
assembly and
recheck.
“W/Bl” circuit open
or short to ground.
Fig. 1
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