1999 SUZUKI GRAND VITARA bulb

YH4
GRAND
VITARA
For CAMI production vehicle
For IWATA production vehicle
1B-12 AIR CONDITIONING (OPTIONAL)
PERFORMANCE DIAGNOSIS
1) Confirm that vehicle and environmental conditions are as fol-
lows.

Vehicle is not exposed to direct sun.

Ambient temperature is within 15C ± 35C (59F ± 95F).
2) Make sure that high pressure valve (1) and low pressure valve
(2) of manifold gauge are firmly closed.
3) Connect high pressure charging hose (3) to high pressure ser-
vice valve (5) on vehicle, and connect low pressure charging
hose (4) to low pressure service valve (6) on vehicle.
4) Bleed the air in charging hoses (3), (4) by loosening their respec-
tive nuts on manifold gauge, utilizing the refrigerant pressure.
When a hiss is heard, immediately tighten nut.
CAUTION:
Do not interchange high and low pressure charging
hoses by mistake.
5) Warm up engine to normal operating temperature (engine cool-
ant temperature at 80 ± 90C (176 ± 194F)) and keep it at spe-
cified idle speed. (Radiator cooling fan should not be working
when checking pressure and temperature.)
6) Turn A / C switch ON, and set blower switch at ªHIº (4th position),
temperature control knob at ªCOOLº, air outlet control knob at
ªFACEº, fresh / circulation control knob at ªCIRCULATIONº.
(Confirm that A / C compressor and condenser fan are working.)
7) Keep all windows, doors and engine food open.
Ambient temperature
15 ± 35C (59F ± 95F)
Engine rpmKeep to 1,500 rpm.
Blower motor switchMax. (4th position)
Temperature controlMax. cool
Air outlet controlFace
Vehicle doorsAll open
Air inlet door positionRecirculation
8) With about 20 mm (0.8 in.) of dry bulb thermometer (1) inserted
into center duct air outlet and another one set near evaporator
air inlet, read temperature indicated on each thermometer.

YH4
GRAND
VITARA
5-6 BRAKES
ConditionPossible CauseCorrection
Brake warning light
turns on after
engine start
Parking brake applied.

Insufficient amount of brake fluid.

Brake fluid leaking from brake line.

Brake warning light circuit faulty.

Malfunctioning EBD system, if equipped
with ABS.Release parking brake and check
that brake warning light turns off.
Add brake fluid.
Investigate leaky point, correct it and
add brake fluid.
Repair circuit.
Check system referring to
ªDIAGNOSISº of ABS section.
Brake warning light
turns on when
brake is applied
Brake fluid leaking from brake line.

Insufficient amount of brake fluid.Investigate leaky point, correct it and
add brake fluid.
Add brake fluid.
Brake warning light
fails to turn on
even when parking
brake is applied
Bulb burnt out.

Brake warning light circuit open.Replace bulb.
Repair circuit.
ABS warning light
does not turn on
for 2 sec. after
ignition switch has
turned ON
Bulb burnt out.

ABS warning light circuit open, if equipped
with ABS. (including check relay)Replace bulb.
Check system referring to
ªDIAGNOSISº of ABS section.
ABS warning light
remains on after
ignition switch has
turned on for 2 sec.
Malfunctioning ABS, if equipped with ABS.Check system referring to
ªDIAGNOSISº of ABS section.

YH4
GRAND
VITARA
1. Diagnosis connector
(6 pins connector)
2. Ground terminal3. Diag. switch terminal
4. Service wire
5E1-6 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
ABS HYDRAULIC UNIT/CONTROL MODULE
ASSEMBLY
ABS control module is a component of ABS hydrauli unit / control
module assembly and has the following functions.
Self-Diagnosis Function
ABS control module diagnoses conditions of the system compo-
nent parts (whether or not there is any abnormality) all the time and
indicates the results (warning of abnormality occurrence and DTC)
through the ªABSº warning lamp as described below.
1) When ignition switch is turned ON, ªABSº warning lamp lights for
2 seconds to check its bulb and circuit.
2) When no abnormality has been detected (the system is in good
condition), ªABSº warning lamp turns OFF after 2 seconds.
3) When the vehicle starts to move after the ignition switch is turned
ON (more than one wheel speed sensor signals are inputted),
solenoid valves and motor of ABS hydraulic unit operate once
one after another for electrical check.
During this check, motor operation sound may be heard but that
means nothing abnormal.
4) When an abnormality in the system is detected, ªABSº warning
lamp lights and the area where that abnormality lies is stored in
the memory of EEPROM in ABS control module.
5) When Diag. switch terminal of diagnosis connector (monitor
connector) is grounded, the abnormal area is output as DTC. It
is indicated by flashing of ªABSº warning lamp. (Refer to the
table below. )
ABS WARNING LAMP
SYSTEM CONDITIONDiag. switch
terminal is not
groundedDiag. switch
terminal is
grounded
In good condi-
No trouble in
the pastOFFDTC 12g
tion at presentTrouble occur-
red in the pastOFFHistory DTC
Abnormality
exists at
No trouble in
the pastONCurrent DTC
exists at
presentTrouble occur-
red in the pastONCurrent and
history DTCs
For procedure to clear all DTC's, refer to the item ªDiagnostic
Trouble Code Clearanceº in this section.
Also ABS control module turns ON EBD warning lamp (brake warn-
ing lamp) depending on the trouble that detected by the module and
EBD warning lamp does not indicate DTC as well as ªABSº warning
lamp.
Fail-Safe Function
When an abnormality occurs (an abnormal DTC is detected), ABS
control module turns OFF the fail-safe relay which supplies power
to ABS hydraulic unit. Thus, with ABS not operating, brakes func-
tion just like the brake system of the vehicle not equipped with ABS.

YH4
GRAND
VITARA
5E1-16 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
-1. Main fuse
-2. Ignition switch
-3. Circuit fuse for IG
-4. ªABSº 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
TABLE ± A ªABSº WARNING LAMP CIRCUIT CHECK ± LAMP DOES NOT
COME ªONº AT IGNITION SWITCH ON
CIRCUIT DESCRIPTION
Operation (ON / OFF) of the ªABSº 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 ªABSº 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
STEPACTIONYESNO
11) Turn ignition switch ON.
Do other warning lamp come ON?Go to step 2.Go to step 4.
21) Disconnect ABS hydraulic unit / control module
connector.
Does ABS warning lamp light with ignition switch ON?Replace ABS
hydraulic unit / control
module assembly.Go to step 3.
31) Remove combination meter.
Is bulb of ABS warning lamp in good condition?ªBl / Oº circuit shorted
to ground. If OK,
replace ABS
warning circuit (lamp
driver module).Replace bulb.
4Is IG fuse in good condition?Open in ªB / Wº wire to
combination meter or
poor connection.Repair and
replace.

YH4
GRAND
VITARA
1. Malfunction indicator lamp (MIL)
2. Scan tool
3. DLC
7B1-18 AUTOMATIC TRANSMISSION (4 A / T)
[For Vehicle without Monitor Connector]
ON-BOARD DIAGNOSTIC SYSTEM
For automatic transmission control system, PCM (ECM) has follow-
ing functions. Refer to Section 6 / 6-1 for details.

When the ignition switch is turned ON with the engine at a stop,
malfunction indicator lamp (MIL) turns ON to check the bulb of the
MIL.

When PCM detects a malfunction in A / T control system (and / or
a malfunction which gives an adverse effect to vehicle emission)
while the engine is running, it makes the malfunction indicator
lamp in the meter cluster of the instrument panel turn ON and
stores the malfunction area in its memory. (If it detects that contin-
uously 3 driving cycles are normal after detecting a malfunction,
however, it makes MIL turn OFF although DTC stored in its
memory will remain.)

It is possible to communicate through DLC by using not only SU-
ZUKI scan tool (Tech-1) but also generic scan tool. (Diagnostic in-
formation can be accessed by using a scan tool.)
2 Driving Cycle Detection Logic
Refer to section 6 / 6-1 for details.
Pending DTC
Refer to section 6 / 6-1 for details.
Freeze Frame Data
Refer to section 6 / 6-1 for details.

YH4
GRAND
VITARA
1. Malfunction indicator lamp (MIL)
2. Scan tool
3. DLC
4. Monitor connector
5. Diagnosis switch terminal
6. Ground terminal MIL
OFF
Time (sec.)
AUTOMATIC TRANSMISSION (4 A / T) 7B1-19
[For Vehicle with Monitor Connector]
ON-BOARD DIAGNOSTIC SYSTEM
For automatic transmission control system, PCM (ECM) has follow-
ing functions. Refer to Section 6 / 6-1 for details.

When the ignition switch is turned ON with the engine at a stop,
malfunction indicator lamp (MIL) turns ON to check the bulb of the
MIL.

When PCM detects a trouble in electronic shift control system, it
stores its trouble code in back-up memory in itself. (The memory
is kept as it is even if the trouble was only temporary and disap-
peared immediately. And it is not erased unless the power to PCM
is shut off for 30 seconds or longer.)

It is possible to communicate through DLC by using not only SU-
ZUKI scan tool (Tech-1) but also generic scan tool. (Diagnostic in-
formation can be accessed by using a scan tool.)

It is also possible to communicate by not using scan tool. PCM
indicates trouble area in memory by means of flashing of malfunc-
tion indicator lamp at the time of inspection (i.e. when diagnosis
switch terminal is grounded and ignition switch is turned ON).

YH4
GRAND
VITARA
G16 / J20 Engines
H25 Engine
1. PCM
2. J / B
3. O / D cut switch
4. P / N change switch
5. J / C
1. PCM
2. Fuse
3. O / D cut switch
4. P / N change switch
5. J / C
6. J / C
AUTOMATIC TRANSMISSION (4 A / T) 7B1-35
DIAGNOSTIC FLOW TABLE B-1 ªO / D OFFº LIGHT CIRCUIT CHECK
(ªO / D OFFº LIGHT DOESN'T LIGHT AT IGNITION SWITCH ON BUT
ENGINE STARTS UP)
WIRING DIAGRAM
TROUBLESHOOTING
STEPACTIONYESNO
1ªO / D OFFº light circuit check:
(1) With ignition switch OFF, disconnect
couplers from PCM.
(2) Using service wire, connect E61-20
(G16 / J20 engines) or E61-7 (H25 engine)
terminal of disconnected PCM coupler and
ground.
Does ªO / D OFFº light turn ON at ignition
switch ON?Poor E61-20 (G16 / J20
engines) or E61-7 (H25
engine) terminal
connection.
If OK, substitute a known-
good PCM and recheck.Bulb burned out or faulty
ªW / Bº, ªB / Wº wire.

YH4
GRAND
VITARA
G16 / J20 Engines
H25 Engine
1. PCM
2. J / B
3. O / D cut switch
4. P / N change switch
5. J / C
1. PCM
2. Fuse
3. O / D cut switch
4. P / N change switch
5. J / C
6. J / C
AUTOMATIC TRANSMISSION (4 A / T) 7B1-37
DIAGNOSTIC FLOW TABLE B-3 ªPOWERº LIGHT CIRCUIT CHECK
(ªPOWERº LIGHT DOESN'T LIGHT AT IGNITION SWITCH ON BUT
ENGINE STARTS UP)
WIRING DIAGRAM
TROUBLESHOOTING
STEPACTIONYESNO
1ªPOWERº light circuit check:
(1) With ignition switch OFF, disconnect
couplers from PCM.
(2) Using service wire, connect E61-21 (G16 /
J20 engines) or E61-10 (H25 engine)
terminal of disconnected PCM coupler and
ground.
Does ªPOWERº light turn ON at ignition switch
ON?Poor E61-21 (G16 / J20
engines) or E61-10 (H25
engine) terminal
connection.
If OK, substitute a known-
good PCM and recheck.Bulb burned out or faulty
ªGr / Blº, ªB / Wº wire.