check engine SUZUKI GRAND VITARA 1999 2.G Owners Manual

7B1-44 AUTOMATIC TRANSMISSION (4 A/T)
LEVEL CHECK AT ROOM TEMPERATURE
The fluid level check at room temperature (20 – 30 °C (68 – 86
°F)) performed after repair or fluid change before test driving is
just preparation for level check of normal operating temperature.
The checking procedure itself is the same as that described previ-
ously. If the fluid level is between FULL COLD and LOW COLD,
proceed to test drive. And when the fluid temperature has
reached the normal operating temperature, check fluid level again
and adjust it as necessary.
Fluid change
1) Lift up vehicle.
2) With engine is cool, remove drain plug (1) from oil pan and
drain A/T fluid.
3) Install drain plug (1).
Tightening torque
A/T fluid drain plug (a) :
23 N·m (2.3 kg-m, 17.0 lb-ft)
4) Lower vehicle and fill proper amount of an equivalent of
DEXRON
®-III.
5) Check fluid level referring to “LEVEL CHECK NORMAL
OPERATING TEMPERATURE” of “FLUID LEVEL” in this
section.
Fluid specification :
An equivalent of DEXRON
®-III
Fluid capacity
When draining from drain plug hole:
2.5 liters (5.28/4.40 US/lmp.pt.)
When overhauling:
6.8 liters (14.37/11.97 US/lmp.pt.)

AUTOMATIC TRANSMISSION (4 A/T) 7B1-45
A/T Throttle Cable
ADJUSTMENT
1) Pull inner cable (3) by force of 2 N (0.2 kg, 0.45 lb) or less to
be no slack of inner cable with A/T throttle cable (1) curved
as shown in the figure.
2) Fix stopper (2) to inner cable (3) with clearance “c”.
A/T throttle cable adjusting position (clearance “c”) :
0.8 – 1.5 mm (0.03 – 0.06 in.)
3) Warm up engine and transmission to normal operating tem-
perature.
4) Make sure that accelerator cable is adjusted as specified.
5) With throttle valve closed, check clearance “c”, which should
be within the following specification, of A/T throttle cable (1).
If it is out of specification, adjust it by turning cable adjusting
nut (2).
A/T throttle cable adjusting position (clearance “c”) :
0.8 – 1.5 mm (0.03 – 0.06 in.)
6) Tighten lock nut (3) securely.
Solenoid Valves (Shift Solenoid Valves and
TCC Solenoid Valve)
INSPECTION
With PCM couplers disconnected and using service wire as
shown in the figure, check each solenoid valve for clicking sound.
Shift solenoid valve - A (#1) C51-1-2
Shift solenoid valve - B (#2) C51-1-1
TCC (Lock-up) solenoid valve C51-1-8

7E-4 DIFFERENTIAL (FRONT)
Flow table
Step Action Yes No
1 Turn ON ignition switch (but engine at stop) and
check malfunction indicator lamp.
Does lamp light up?Go to step 2. A trouble has occurred
at some place. Repair
it referring to
MALFUNCTION INDI-
CATOR LAMP
(“CHECK ENGINE”
LAMP) CHECK in
DIAGNOSIS of Sec-
tion 6.
2 Check 4WD switch circuit.
Turn ignition switch ON and check that voltage
between terminal C51-3-7 and terminal C51-3-17
(ground) is as follows.
 When transfer shift lever is in N or 2H : 10 – 14 V
 When transfer shift lever is in 4L or 4H : 0 – 1 V
Is the check result satisfactory?Go to step 3. Check 4WD switch
(refer to Section 7A),
“BLK/ORN” and “BLK”
circuits of 4WD switch.
If OK, substitute a
known-good ECM
(PCM) and recheck.
3 Check power supply.
1) Turn ignition switch ON.
2) Check voltage between C51-1-9 and C51-3-17
(ground). The check results should be as follows.
 When transfer shift lever is in N or 2H : 0 – 1 V
 When transfer shift lever is in 4L or 4H : 10 – 14 V
Is the check result satisfactory?Go to step 4. Check “RED” circuit. If
it is OK, substitute a
known-good ECM
(PCM) and recheck.
4 Check air pump assembly circuit.
1) Check for proper connection to air pump assem-
bly at all terminals.
2) Turn ignition switch ON.
3) Check voltage between C51-3-18 and C51-3-17
(ground). The check result should be as follows.
 When transfer shift lever is in 2H or N : 0 – 1 V
 When transfer shift lever is in 4L or 4H (more than
4 seconds after shifted to 4L or 4H) : 10 – 14 V
Is the check result satisfactory?Go to step 5. Check air pump
assembly referring to
“ON-VEHICLE SER-
VICE”, and then
“PNK” circuit.
If OK, substitute a
known-good ECM
(PCM) and recheck.
5 Check 4WD indicator lamp circuit.
1) Turn ignition switch ON.
2) Check voltage between E61-19 and C51-3-17
(ground). The check result should be as follows.
 When transfer shift lever is in 2H or N : 10 – 14 V
 When transfer shift lever is in 4L or 4H : 0 – 1 V
Is the check result satisfactory?4WD control system is
in good condition.Check “ORN/BLK” cir-
cuit (including indica-
tor lamp and
combination meter).
If OK, substitute a
known-good ECM
(PCM) and recheck.

7F-4 DIFFERENTIAL (REAR)
Precaution for Maintenance Service
•When having driven through water, check immediately if
water has entered (if so, oil is cloudy). Water mixed oil must
be changed at once.
•Whenever vehicle is hoisted for any other service work than
oil change, also be sure to check for oil leakage and status of
breather hoses.
Differential Gear Oil Change
1) Before oil change or inspection, be sure to stop engine and
lift up vehicle horizontally.
2) Check oil level and existence of leakage. If leakage is found,
correct its cause.
3) Drain old oil and pour proper amount of gear oil as specified
(roughly up to level hole).
4) Torque drain plug (3) and level/filler plugs (2) to specification.
“A” : Sealant 99000-31110
Tightening torque
Differential oil level/filler plug (a) :
50 N·m (5.0 kg-m, 36.5 lb-ft)
Differential oil drain plug (b) :
28 N·m (2.8 kg-m, 20.5 lb-ft)
Hypoid gear oil :
API GL-5, SAE 75W-85, 80W-90 or 90
Oil capacity :
2.5 liters (5.3/4.4 US/Imp. pt.) NOTE:
Hypoid gear oil must be used for differential.
It is highly recommended to use SAE 80W-90 viscosity.
1. Breather hose

INSTRUMENTATION/DRIVER INFORMATION 8C-3
COMBINATION METER INTERNAL CIRCUITS
COMBINATION METER COUPLERS
[A] : Coupler A [B] : Coupler B [C] : Coupler C
1. To Cruise control module (if equipped) GRY/YEL 1. To door switch (drive side) BLK/BLU 1. To ground BLK
2. Blank–2. To transmission range switch
(A/T vehicle only, if equipped) LGRN/BLU 2. To ECM (PCM for A/T vehicle) BRN
3. To ignition switch BLK/WHT 3. To transmission range switch
(A/T vehicle only, if equipped) 2GRN/ORN 3. To ignition switch PPL/RED
4. Blank–4. To transmission range switch
(A/T vehicle only, if equipped) DYEL/GRN 4. To brake fluid level switch RED/BLK
5. To ABS control module (if equipped) BLU/ORN 5. To transmission range switch
(A/T vehicle only, if equipped) NORN/BLU 5. To parking brake switch PPL
6. To PCM (A/T vehicle only) GRY/BLU 6. To transmission range switch
(A/T vehicle only, if equipped) PORN/GRN 6. To seat belt switch GRY/RED
7. To ABS control module (if equipped) BRN 7. To transmission range switch
(A/T vehicle only, if equipped) RRED 7. To generator WHT/RED
8. To VSS BLU/YEL 8. To illumination control module RED/GRN 8. To engine oil pressure switch YEL/BLK
9. To combination switch GRN/RED 9. To PCM (A/T vehicle only) WHT/BLK 9. To combination switch RED/YEL
10. To air bag SDM BLU 10. To ECT sensor YEL/WHT 10. To ignition switch BLU/RED
11. To main fuse WHT/BLU 11. To fuel level gauge BLU/WHT
12. To fuse box WHT 12. To ground BLU/YEL
13. To combination switch RED 13. To combination switch GRN/YEL
14. To immobilizer control module
(if equipped)PPL
15. To ECM (PCM for A/T vehicle) PPL/YEL
16. To ECM (PCM for A/T vehicle) ORN/BLK
P R N D 2 LCRUISEPOWER4WDSPEED
METERTACHO
METERFUEL
METERTEMP.
METER
A-11
A-13 A-8 B-12 B-11 C-8 A-15 A-6 A-1 B-9 A-16 A-14 C-7 C-1 A-10 C-3 C-4 C-5 A-7 A-5 B-8 B-1B-10 C-2 A-12 A-3B-13 B-2 B-3 B-4 B-5 B- B-6 C-9 C-10 A-9ABS circuit EBD circuit Air bag circuit
or ABS or BRAKE
if equipped
or CHECK
ENGINE
NOTE:
Terminal arrangement of coupler viewed from harness side.

INSTRUMENTATION/DRIVER INFORMATION 8C-5
Engine Coolant Temperature (ECT) Meter and
Sensor
Engine coolant temperature sensor
REMOVAL AND INSTALLATION
Refer to “ECT SENSOR” in Section 6E2.
Oil Pressure Light
Oil pressure switch
REMOVAL AND INSTALLATION
Refer to “OIL PRESSURE CHECK” in Section 6A2.
Brake Warning Light
Brake fluid level switch
INSPECTION
Use an ohmmeter to check switch for continuity.
If found defective, replace switch (reservoir).
Brake fluid level switch specification
OFF position (float up) : No continuity
ON position (float down) : Continuity

AIR BAG SYSTEM 10B-21
Table E - SDM Cannot Communicate through The Serial Data Circuit
WIRING DIAGRAM
TABLE TEST DESCRIPTION
STEP 1 : An improper connection to the data link connector (DLC) will prevent communications from being
established.
STEP 2 : This test checks whether it is possible to communicate with other control module.
STEP 3 : This test checks for an open in “PPL/RED” circuit (in air bag harness).
[A]: Air bag harness 5.“AIR BAG” fuse 10.“AIR BAG” monitor coupler
1. From main fuse 6. Connection detection pin 11. Ground for air bag system
2. Ignition switch 7. SDM 12. Ground on body
3.“IG METER” fuse 8. DLC 13. Ground on Engine block
4.“AIR BAG” warning lamp in combination lamp 9. To ECM, TCM (if equipped) and ABS con-
trol module (if equipped)14. Immobilizer control module (if equipped)
14
1PPL/WHT
BLK
BLK/YEL WHT
10
11
PPL
BLK
“Q04”Q01-15
Q01-17DNS
GND7
[A]5V
812
13
1
2
34 BLK/BLUBLU/BLK BLU/RED
BLK/WHT BLK/WHTBLUBLU
6
PPL/REDPPL/RED
9
Q01-2
Q01-20L1
L2
SDLLA
Q01-4
IG
12V
“G27”
“Q02”
5
CAUTION:
Be sure to perform AIR BAG DIAGNOSTIC SYSTEM CHECK before starting diagnosis according to
flow table.
When measurement of resistance or voltage is required in this table, use a tester along with a cor-
rect terminal adapter from special tool (Connector test adapter kit).
When a check for proper connection is required, refer to INTERMITTENT AND POOR CONNEC-
TIONS in this section.
If there is open circuit in the air bag wire harness, connector or terminal is found damaged, replace
the wire harness, connector and terminal as an assembly.