Suzuki Grand Vitara JB627. Manual — part 151
3C-8 Transfer:
4L-lock (4WD Low Center Differential Lock) Position
When 4L-lock position is selected from 4H-lock position by turning the transfer switch, the transfer shift control
actuator motor runs and shift cam rotates in the arrow direction “A”. The shift cam shifts the High/Low shift fork in the
arrow direction “B”, and the reduction shift sleeve moves in the arrow direction “B”. Also, the shift cam shifts the
differential lock shift fork in the arrow direction “C”, and the differential lock clutch sleeve also moves in the arrow
direction “C”.
The driving force from the transmission is transmitted from the transfer low gear, through the transfer input gear and
transfer counter gear with the speed reduced. At this time, as the center LSD case and transfer low gear are engaged
via reduction shift sleeve, the driving force is transmitted to the rear output shaft.
The driving force of the rear output shaft makes the front output shaft rotate via the differential lock clutch sleeve as in
the case of 4H-lock position.
A
B
C
[A]
[B]
1
2
5
4
4
3
5
9
8
6
7
11
10
12
13
17
15
18
16
14
19
I5JB0A332006-02
[A]: Transfer position indicator
4. Shift fork pin
9. Reduction shift sleeve
14. Center LSD case
19. Low gear
[B]: Transfer switch
5. Shift cam
10. Differential lock clutch sleeve
15. Front drive shaft
1. 4L/N switch
6. High / Low shift fork
11. Front drive sprocket
16. Counter gear
2. Center differential lock switch
7. Differential lock shift fork
12. Front drive sprocket bush
17. Drive chain
3. Transfer actuator
8. Input gear
13. Rear output shaft
18. Front output shaft
Transfer: 3C-9
Input / Output Signal Table of 4WD Control Module
S6JB0B3301008
4WD control module outputs the following signals to actuators, indicators, warning buzzer, according to the transfer
switch operation.
Output signal (to each component parts)
Transfer
shift
actuator
Differential
lock
indicator
4L indicator N indicator
Warning
buzzer
Input signal
Transfer switch
{
{
{
{
{
CPP switch
{
{
{
{
TCM
{
{
{
{
ABS hydraulic unit / control
module
{
{
{
{
{
4L/N switch
{
{
{
Center differential lock switch
{
{
3C-10 Transfer:
On-Board Diagnostic System Description
S6JB0B3301009
For 4WD control system, 4WD control module has the following functions.
• When ignition switch is turned ON with engine at stop, differential lock indicator (1), 4L indicator (2) and N indicator
(3) turn on at the same time for 2 seconds in order to check operation of these indicators.
• When 4WD control module detects any malfunction in the following area, differential lock indicator (1), 4L indicator
(2) and N indicator (3) flash continuously and 4WD control module comes into fail-safe mode. For details of fail safe
mode, refer to “Fail-Safe Table”.
– Transfer switch
– Transfer shift actuator motor
– Transfer shift actuator motor position switch
– 4L/N switch
– Center differential lock switch
• DTC can be checked by either one of the following ways.
– DTC can be checked by using SUZUKI scan tool (4) connected to DLC (5).
– If equipped with diagnosis connector, DTC can be displayed on digital display odometer by shorting diagnosis
connector (6).
• When 4WD control module detects any malfunction, 4WD control module will shift automatically transfer to either N
or former position which is in before shifting process began.
DLC (Data Link Connector)
Refer to “Data Link Connector (DLC)” under “On-Board Diagnostic System Description in Section 1A”.
1
2
3
4
5
6
I5JB0A332008-01
Transfer: 3C-11
CAN Communication System Description
S6JB0B3301010
Refer to “CAN Communication System Description in Section 1A”.
4WD Control Module Transmission Data
4WD Control Module Reception Data
BCM
Combination
Meter
Transmit
DATA
4WD
Buzzer on reques
Lock indication status
Neutral Indication Status
Low indication status
4WD diagnostic trouble codes
control
module
ECM
4WD shift position
I6JB0B330001-01
ECM
TCM
DATA
Receive
Engine speed signal
Vehicle speed signal
Brake pedal switch active
4WD
control
module
Transmission gear
selector position
Wheel speed pulse
(front right)
Wheel speed pulse
(front left)
Wheel speed pulse
(rear right)
Wheel speed pulse
(rear left)
ABS active
ABS control module
(Non-ESP® model)
ESP® control module
(ESP® model)
ESP® status signal
I6JB01331001-02
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