2001 SUZUKI GRAND VITARA N at p switch

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.

AUTOMATIC TRANSMISSION (4 A/T) 7B1-33
TROUBLESHOOTING
REFERENCE
Connect oscilloscope between C51-1-23 (+) and C51-1-22 (–) of
PCM connector connected to PCM and check output speed sen-
sor signal. Step Action Yes No
1Was “A/T DIAGNOSTIC FLOW TABLE” in this
section performed?Go to Step 2. Go to “A/T DIAGNOSTIC
FLOW TABLE” in this sec-
tion.
2 Output shaft speed sensor circuit check :
1) Remove PCM cover.
2) With ignition switch OFF, disconnect PCM
connectors.
3) Check for proper connection to output
speed sensor at C51-1-22 and C51-1-23
terminals.
4) If OK, check resistance of sensor circuit.
Resistance between C51-1-22 and C51-1-23 :
387 – 473 Ω
ΩΩ Ω (at 20 °C (68 °F))
Resistance between C51-1-22/C51-1-23 and
ground :
1 MΩ
ΩΩ Ω or more
Are check results satisfactory?Go to Step 4. Go to Step 3.
3 Output shaft speed sensor check :
1) With ignition switch OFF, disconnect output
shaft speed sensor connector.
2) Check for proper connection to output shaft
speed sensor at each terminals.
3) If OK, then check resistance of output shaft
speed sensor.
Are measured values as specified in Step 2?“ORN” or “WHT” wire
open or shorted to
ground.Replace output shaft
speed sensor.
4 Check visually output shaft speed sensor and
sensor rotor for the followings.
•No damage
•No foreign material attached
•Correct installation
Are they in good condition?Intermittent trouble or
faulty PCM.
Check for intermittent
referring to “INTERMIT-
TENT AND POOR CON-
NECTION” in Section 0A.Clean, repair or replace.
[A] : Oscilloscope waveforms at about 40 km/h (25 mile/h)

AUTOMATIC TRANSMISSION (4 A/T) 7B1-35
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, warm it up to normal operating temperature and shift transfer lever to “2H” or “4H” range.
4) Shift selector lever in D range and keep it there for 10 seconds.
5) Increase vehicle speed to about 80 km/h (50 mile/h) in 4th gear and in D range.
6) Keep driving at above speed for 20 seconds.
7) Release accelerator pedal, decrease vehicle speed and stop vehicle.
8) Check DTC and/or pending DTC.
TROUBLESHOOTING
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.
Step Action Yes No
1Was “A/T DIAGNOSTIC FLOW TABLE” in this
section performed?Go to Step 2. Go to “A/T DIAGNOSTIC
FLOW TABLE” in this sec-
tion.
2 Check TCC solenoid circuit for short.
1) Turn ignition switch OFF and disconnect
PCM connectors.
2) Check for proper connection to PCM at ter-
minal C51-1-8.
3) If OK, then turn ignition switch ON and mea-
sure voltage between terminal C51-1-8 of
disconnected PCM connector and ground.
Is it about 0 V?Go to Step 3.“GRN/YEL” circuit shorted
to power circuit.
3 Check TCC solenoid circuit for open or short.
1) Turn ignition switch OFF.
2) Measure resistance between terminal C51-
1-8 of disconnected PCM connector and
ground.
Is it 11 – 15 Ω (at 20 °C (68 °F))?Intermittent trouble or
faulty PCM.
Check for intermittent
referring to “INTERMIT-
TENT AND POOR CON-
NECTION” in Section 0A.“GRN/YEL” circuit open or
shorted to ground.
If wire and connections
are OK, replace TCC
solenoid.

AUTOMATIC TRANSMISSION (4 A/T) 7B1-37
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) Shift selector lever in D range and keep it for 10 seconds.
5) Drive vehicle about 30 km/h (20 mile/h) with 2nd gear in “D” range for 10 seconds.
6) Increase vehicle speed to about 80 km/h (50 mile/h) with 4th gear in D range and keep it for 10 seconds.
7) Release accelerator pedal, decrease vehicle speed and stop vehicle.
8) Check DTC and/or pending DTC.
TROUBLESHOOTING
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.
Step Action Yes No
1Was “A/T DIAGNOSTIC FLOW TABLE” in this
section performed?Go to Step 2. Go to “A/T DIAGNOSTIC
FLOW TABLE” in this sec-
tion.
2 Check shift solenoid circuit for short.
1) Turn ignition switch OFF and disconnect
PCM connectors.
2) Check for proper connection to PCM at ter-
minals C51-1-2 or C51-1-1.
3) If OK, then turn ignition switch ON and mea-
sure voltage between terminal C51-1-2 or
C51-1-1 of disconnected PCM connector
and ground.
Is it about 0 V?Go to Step 3.“GRN” or “GRN/RED“ cir-
cuit shorted to power cir-
cuit.
3 Check shift solenoid circuit for open or short.
1) Turn ignition switch OFF.
2) Measure resistance between terminal C51-
1-2 or C51-1-1 of disconnected PCM con-
nector and ground.
Is it 11 – 15 Ω (at 20 °C (68 °F))?Intermittent trouble or
faulty PCM.
Check for intermittent
referring to “INTERMIT-
TENT AND POOR CON-
NECTION” in Section 0A.“GRN” or “GRN/RED“ cir-
cuit open or shorted to
ground.
If wire and connections
are OK, replace malfunc-
tion shift solenoid.

AUTOMATIC TRANSMISSION (4 A/T) 7B1-41
Manual Road Test
This test check the gear being used in “L”, “2” or “D” range when
driven with unoperated gear shift control system. Test drive vehi-
cle on a level road.
1) Disconnect shift solenoid coupler (1) valves on transmission.
2) With select lever in “P”, start engine and warm it up.
3) With select lever in “L” range, start vehicle and accelerate to
20 km/h (12.5 mile/h). Check in this state that 1st gear is
being used.
4) At 20 km/h (12.5 mile/h), shift select lever to “2” range and
accelerate to 40 km/h (25 mile/h). Check in this state that 3rd
gear is being used.
5) At 40 km/h (25 mile/h), shift select lever to “D” range and
check that O/D gear is used when speed is higher than 40
km/h (25 mile/h).
6) After above checks, stop vehicle then engine, and connect
shift solenoids coupler (1) with ignition switch OFF.
7) Clear DTC with scan tool.
Time Lag Test
This test is to check conditions of clutch, reverse brake and fluid pressure. “Time lag” means time elapsed since
select lever is shifted with engine idling till shock is felt.
1) With chocks placed before and behind front and rear wheels respectively, depress brake pedal.
2) Start engine.
3) With stop watch ready, shift select lever from “N” to “D” range and measure time from that moment till shock
is felt.
4) Similarly measure time lag by shifting select lever from “N“ to “R” range.
Specification for time lag :NOTE:
Before this test, check diagnostic trouble code (DTC).
WARNING:
To avoid the danger of being burned, do not touch the hot
exhaust system when disconnecting shift solenoid cou-
pler (1).
WARNING:
To avoid the danger of being burned, do not touch the hot
exhaust system when connecting shift solenoid coupler
(1).
“N” →
→→ → “D”Less than 1.2 sec.
“N” →
→→ → “R”Less than 1.5 sec.

7B1-46 AUTOMATIC TRANSMISSION (4 A/T)
MANUAL SELECTOR ASSEMBLY
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Remove console box.
3) Disconnect connector for illumination lamp, shift lock sole-
noid (if equipped) and overdrive OFF switch (if equipped).
4) Remove selector assembly mounting bolts.
5) Disconnect selector cable (1) from manual selector assem-
bly (2) expanding selector cable clip (3).
INSTALLATION
Reverse removal procedure to install manual selector assembly
noting the following instructions.
•Make sure that selector cable clip (3) hold selector cable (1)
on manual selector assembly (2) securely.
•Tighten manual selector assembly mounting bolts as speci-
fied torque.
Tightening Torque
Manual selector assembly mounting bolts :
18 N·m (1.8 kg-m, 13.5 lb-ft)
•Connect interlock cable end to cam referring to step 2) to 8)
of “Interlock cable installation” of the service manual men-
tioned in FOREWORD of this manual, if necessary.
•Confirm that brake (key) interlock system operates properly
(if equipped).
1. Manual lever assembly 4. Bulb filter 7. Shift lock solenoid (if equipped)
2. Select indicator assembly 5. Bulb 8. Manual selector assembly mounting bolt
3. Illumination assembly 6. knob assembly Tightening torque

7B1-48 AUTOMATIC TRANSMISSION (4 A/T)
SELECT CABLE
ADJUSTMENT
1) Loosen manual shift lever (select cable side) nut (1).
2) Shift select lever to “N” range.
3) Align center line (2) on manual valve shaft (3) to “N” refer-
ence line (4) as shown.
4) Tighten manual shift lever nut (selector cable side) (1) as
specified torque.
Tightening torque
Manual shift lever nut (a) :
23 N·m (2.3 kg-m, 17.0 lb-ft)
5) After select cable was installed, check for the following.
•Push vehicle with selector lever shifted to “P” range.
Vehicle should not move.
•Vehicle can not be driven in “N” range.
•Vehicle can be driven in “D”, “2” and “L” ranges.
•Vehicle can be backed in “R” range.
1. Selector lever assembly 6. Washer 11. Transmission range switch assembly
2. Selector lever assembly mounting bolt 7. Clip 12. Transmission range switch mounting bolt
3. Selector cable 8. Manual select lever nut (transmission range switch side) 13. Manual select lever nut (selector cable side)
4. Cable bracket 9. Lock washer 14. Selector cable clip
5. Cable bracket mounting bolt 10. Manual select lever Tightening Torque
24
3
1, (a)

7B1-60 AUTOMATIC TRANSMISSION (4 A/T)
Accumulator piston and spring specification :
Tightening Torque Specification
Used forPiston outer
diameter “a”Spring free length “b”
Direct clutch accumulator (2)31.80 – 31.85 mm
(1.252 – 1.254 in.)Upper spring 43.56 mm (1.715 in.)
Lower spring 30.00 mm (1.181 in.)
Forward clutch accumulator (1)31.80 – 31.85 mm
(1.252 – 1.254 in.)Upper spring 57.18 mm (2.251 in.)
Lower spring 30.50 mm (1.201 in.)
Second brake accumulator (3)34.80 – 34.85 mm
(1.370 – 1.372 in.)Upper spring 56.16 mm (2.211 in.)
Lower spring 18.5 mm (0.728 in.)
Fastening partTightening torque
Nm kg-m lb-ft
Automatic transmission fluid drain plug 23 2.3 17.0
Transfer oil level/filler and drain plugs 23 2.3 17.0
Transmission case plug 17 1.7 12.5
Manual select lever nut 13 1.3 9.5
Manual select cable nut 7 0.7 5.5
Manual selector assembly bolts 18 1.8 13.5
Transmission to engine bolts and nuts 85 8.5 61.5
Engine rear mounting bolts
Engine rear mounting member bolts50 5.0 36.5
Universal joint flange bolts and nuts 50 5.0 36.5
Torque converter mounting bolts 65 6.5 47.0
Adapter case or extension case bolts 42 4.2 30.0
Transmission range switch lock bolt 5.5 0.55 4.0
Oil pipe union bolts 35 3.5 22.5
Drive plate bolts 78 7.8 56.5
Interlock cable clamp screw 2.2 0.22 1.5
Interlock cable outer mounting nut 13 1.3 9.5