1999 SUZUKI GRAND VITARA engine diagram

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-1
6E2
SECTION 6E2
ENGINE AND EMISSION CONTROL SYSTEM
(SEQUENTIAL MULTIPORT FUEL INJECTION
FOR H27 ENGINE)
CONTENTS
General Description ..................................... 6E2-2
System Flow ............................................... 6E2-3
System Diagram ......................................... 6E2-4
Air Intake System ....................................... 6E2-6
Fuel Delivery System ................................. 6E2-7
Electronic Control System .......................... 6E2-8
Engine and Emission Control Input/Output
Table ........................................................ 6E2-12
Diagnosis .................................................... 6E2-12
On-Vehicle Service..................................... 6E2-13
General .................................................... 6E2-13
Accelerator Cable Adjustment .................. 6E2-14
A/T Throttle Cable Adjustment
(A/T Vehicle) ............................................ 6E2-14Idle Speed/Idle Air Control (IAC) Duty
Inspection................................................. 6E2-15
[Using SUZUKI scan tool] .................... 6E2-15
[Not using SUZUKI scan tool]
(vehicle with monitor connector) .......... 6E2-16
Idle mixture inspection/adjustment
(vehicle without heated oxygen sensor) 6E2-17
Air Intake System ..................................... 6E2-18
Throttle body ........................................ 6E2-18
Idle air control valve (IAC valve) .......... 6E2-21
Fast idle air valve ................................. 6E2-22
Fuel Delivery System ............................... 6E2-23
Fuel pressure inspection ...................... 6E2-23
Fuel pump ............................................ 6E2-24
Fuel pressure regulator ........................ 6E2-25 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
Whether following systems (parts) are used in the particular vehicle or not depends on specifications.
Be sure to bear this in mind when performing service work.
Monitor connector
CKP sensor
MAP sensor
EGR valve
Heated oxygen sensor or CO adjusting resistor
Three way catalytic converter, Warm-up three way catalytic converter

6E2-4 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
System Diagram

AUTOMATIC TRANSMISSION (4 A/T) 7B1-1
7B1
SECTION 7B1
AUTOMATIC TRANSMISSION (4 A/T)
CONTENTS
General Description ......................................7B1-3
Electronic Shift Control System ................... 7B1-4
Automatic gear shift diagram................... 7B1-5
Diagnosis .......................................................7B1-7
On-Board Diagnostic System
(Vehicle without monitor connector) ............ 7B1-7
On-Board Diagnostic System
(Vehicle with monitor connector) ................. 7B1-8
Precaution in Diagnosing Trouble ............... 7B1-9
Automatic Transmission Diagnostic Flow
Table ......................................................... 7B1-10
Malfunction Indicator Lamp (MIL) Check... 7B1-13
“O/D OFF” Lamp Check ............................ 7B1-13
“POWER” Lamp Check ............................. 7B1-13
Diagnostic Trouble Code (DTC) Check ..... 7B1-13
Diagnostic Trouble Code Clearance ......... 7B1-13
Diagnostic Trouble Code Table ................. 7B1-14
Fail Safe Table .......................................... 7B1-14
Visual Inspection ....................................... 7B1-14
A/T Basic Check ........................................ 7B1-14
Trouble Diagnosis Table 1 ........................ 7B1-15
Trouble Diagnosis Table 2 ........................ 7B1-15
Trouble Diagnosis Table 3 ........................ 7B1-16
Scan Tool Data ......................................... 7B1-17
Inspection of PCM and Its Circuit .............. 7B1-17Wire Harness and Connectors .................. 7B1-17
Table A-1 : No TCC Lock-Up Occurs ........ 7B1-18
Table A-2 : No Gear Shift to O/D .............. 7B1-20
Table B-1 : “O/D OFF” Light Circuit Check
(“O/D OFF” Light Doesn’t Light at Ignition
Switch ON But Engine Starts Up) ............. 7B1-22
Table B-2 : “O/D OFF” Light Circuit Check
(“O/D OFF” Light Comes ON Steadily) ..... 7B1-23
Table B-3 : “POWER” Light Circuit Check
(“POWER” Light Doesn’t Light at Ignition
Switch ON But Engine Starts Up) ............. 7B1-24
Table B-4 : “POWER” Light Circuit Check
(“POWER” Light Comes ON Steadily) ...... 7B1-25
DTC P0705 (DTC NO.72) - Transmission
Range Sensor (Switch) Circuit Malfunction7B1-26
DTC P0715 (DTC NO.76) - Input/Turbine
Speed Sensor Circuit Malfunction............. 7B1-29
DTC P0720 (DTC NO.75) Output Speed
Sensor Circuit Malfunction ........................ 7B1-32
DTC P0743 (DTC NO.65/66) -
TCC (Lock-Up) Solenoid Electrical ........... 7B1-34
DTC P0753 (DTC NO.61/62)
Shift Solenoid-A (#1) Electrical
DTC P0758 (DTC NO.63/64)
Shift Solenoid-B (#2) Electrical ................. 7B1-36 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
For the descriptions (items) not found in this section, refer to the same section of the Service Manual
mentioned in FOREWORD of this manual.

7B1-18 AUTOMATIC TRANSMISSION (4 A/T)
Table A-1 : No TCC Lock-Up Occurs
SYSTEM DESCRIPTION
PCM turns TCC solenoid OFF under any of the following conditions.
•Brake pedal switch : ON
•4WD LOW switch : ON
•Cruise control module : TCC OFF command signal is output (if equipped).
•ECT : ECT < 30 °C (86 °F)
TROUBLESHOOTING
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 person, a driver and tester, on a level road.
Step Action Yes No
1Was “AUTOMATIC TRANSMISSION DIAG-
NOSTIC FLOW TABLE” performed?Go to Step 2. Go to “AUTOMATIC
TRANSMISSION DIAG-
NOSTIC FLOW TABLE” in
this section.
2 ECT check :
1) Warm up engine to normal operating tem-
perature.
2) Check ECT using scan tool.
Is ECT more than 30 °C (86 °F)?Go to Step 3. Faulty ECT sensor, its cir-
cuit or engine cooling sys-
tem.
If OK, substitute a known-
good PCM and recheck.
3 Perform running test under the following condi-
tions and check voltage between C51-1-8 termi-
nal of PCM coupler and ground.
•Normal mode in “D” range.
•Transfer “2H” position.
•Cruise control is not operated (if equipped).
•Brake pedal released.
•Drive vehicle with TCC ON condition refer-
ring to “TCC LOCK-UP DIAGRAM” in this
section.
Is it battery voltage?Faulty TCC solenoid
valve, its circuit or trans-
mission.Go to Step 4.
4 Brake switch signal inspection :
With ignition switch ON, check voltage between
E61-34 terminal of PCM coupler terminal and
ground.
Brake switch specification
Brake pedal released : 0 V
Brake pedal depressed : Battery voltage
Is the result as specified?Go to Step 5. Faulty brake pedal switch
or its circuit.
If OK, substitute a known-
good PCM and recheck.

7B1-20 AUTOMATIC TRANSMISSION (4 A/T)
Table A-2 : No Gear Shift to O/D
SYSTEM DESCRIPTION
PCM does not shift to O/D gear under any of the following conditions.
•O/D off switch : ON
•4WD LOW switch : ON
•Cruise control module : O/D OFF command signal is output (if equipped).
•ECT : ECT < 30 °C (86 °F)
TROUBLESHOOTING
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 person, a driver and tester, on a level road.
Step Action Yes No
1Was “AUTOMATIC TRANSMISSION DIAG-
NOSTIC FLOW TABLE” performed?Go to Step 2. Go to “AUTOMATIC
TRANSMISSION DIAG-
NOSTIC FLOW TABLE” in
this section.
2 ECT check :
1) Warm up engine to normal operating tem-
perature.
2) Check ECT using scan tool.
Is ECT more than 30 °C (86 °F)?Go to Step 3. Faulty ECT sensor, its cir-
cuit or engine cooling sys-
tem.
If OK, substitute a known-
good PCM and recheck.
3 Perform running test under the following condi-
tions and check voltage between C51-1-2 termi-
nal of PCM coupler and ground, C51-1-1
terminal of PCM coupler and ground.
•O/D off switch OFF (“O/D OFF” lamp OFF).
•Normal mode in “D” range.
•Transfer “2H” position.
•Cruise control is not operated (if equipped).
•Drive vehicle with 4th gear condition refer-
ring to “Gear shift diagram” in this section.
Is each voltage about 0 V?Faulty shift solenoid valve,
its circuit or transmission“GRN” wire or “GRN/
RED” wire shorted to
power circuit.
If OK, go to Step 4.
4 O/D off switch signal inspection :
With ignition switch ON, check voltage between
E61-33 terminal of PCM coupler and ground.
“O/D” cut switch specification
“O/D” cut switch OFF : Battery voltage
“O/D” cut switch ON : 0 V
Is the result as specified?Go to Step 5. Faulty O/D off switch or its
circuit.
If OK, substitute a known-
good PCM and recheck.

7B1-22 AUTOMATIC TRANSMISSION (4 A/T)
Table B-1 : “O/D OFF” Light Circuit Check (“O/D OFF” Light Doesn’t Light at
Ignition Switch ON But Engine Starts Up)
WIRING DIAGRAM
TROUBLESHOOTING
1. PCM 4. P/N change switch
2. Fuse 5. J/C
3. O/D off switch 6. J/C
Step Action Yes No
1“O/D OFF” light circuit check:
1) With ignition switch OFF, disconnect cou-
plers from PCM.
2) Using service wire, connect E61-20 termi-
nal of disconnected PCM coupler and
ground.
Does “O/D OFF” light turn ON at ignition switch
ON?Poor E61-20 terminal con-
nection.
If OK, substitute a know-
good PCM and recheck.Bulb burned out or faulty
“WHT/BLK”, “BLK/WHT”
wire.

7B1-24 AUTOMATIC TRANSMISSION (4 A/T)
Table B-3 : “POWER” Light Circuit Check (“POWER” Light Doesn’t Light at
Ignition Switch ON But Engine Starts Up)
WIRING DIAGRAM
TROUBLESHOOTING
1. PCM 4. P/N change switch
2. Fuse 5. J/C
3. O/D off switch
Step Action Yes No
1“POWER” light circuit check :
1) With ignition switch OFF, disconnect cou-
plers from PCM.
2) Using service wire, connect E61-21 termi-
nal of disconnected PCM coupler and
ground.
Does “POWER” light turn ON at ignition switch
ON?Poor E61-21 terminal con-
nection.
If OK, substitute a known-
good PCM and recheck.Bulb burned out or faulty
“GRY/BLU”, “BLK/WHT”
wire.

7B1-32 AUTOMATIC TRANSMISSION (4 A/T)
DTC P0720 (DTC NO.75) Output Speed Sensor Circuit Malfunction
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF, if available.
2) Clear DTC, pending DTC and freeze frame data in PCM memory by using scan tool.
3) Start engine and shift transfer lever to “2H” or “4H” range.
4) Drive vehicle at 40 km/h (25 mile/h) or more for longer than 10 sec. (or higher than 3500 r/min engine speed
with “D” range for longer than 10 sec.)
5) Stop vehicle and check DTC and/or pending DTC.
1. PCM
2. Output shaft speed sensor
DTC DETECTING CONDITION TROUBLE AREA
•With 4WD LOW switch OFF, no output shaft speed
sensor signal is inputted while vehicle speed sensor
signal are inputted,
or
•With 4WD LOW switch OFF, no output shaft speed
sensor signal is inputted while engine running at
higher than specified engine speed with “D” range.
(2 driving cycle detection logic)•Output speed sensor or its circuit
•PCM
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 persons, a driver and a tester, on a level road.