Suzuki Grand Vitara JB416 / JB420. Manual — part 219

5A-10 Automatic Transmission/Transaxle:

TCM Reception Data

ECM

BCM

DATA

TCM

Receive

Engine torque signal

Engine speed

Accelerator pedal position

4th gear inhibit

Torque converter clutch

control inhibit

Lock up/ slip control

inhibit signal
Throttle position

Stand by to engage air

conditioning compressor

Engine coolant

temperature

Cruise control signal

(if equipped with cruise

control system)

Vehicle speed

Brake pedal switch active

AT mode status

Air conditioning

compressor clutch

engaged

(if equipped with A/C)

I5JB0A510007-03

Automatic Transmission/Transaxle: 5A-11

Electronic Shift Control Input / Output Table

S5JB0A5101004

NOTE
*1: For vehicle not equipped with engine diagnosis connector model (Except RH steering vehicle not
equipped with rear fog light model)

INPUT / OUTPUT

CONTROL

Accelerator effective position

Throttle position

Coolant temperature

Engine torque

Engine speed

A/C ON/OFF

Brake light switch

Vehicle speed

Cruise control signal

P/N mode switch

"3" position switch

Input shaft speed sensor

ATF temperature sensor

Output shaft speed sensor

4L/N switch

Torque reduction request

Shift switch

Lock-up control

Gear Shift control

4th gear inhibit control

Slope shift control

Cruise shift control

Slip control

Line pressre control

Torque control

Overrun control

Reverse control

Squat control

Speed meter indicate

Output

Input

Shift solenoid valve-A

Shift solenoid valve-B

Pressure control solenoid valve

TCC pressure control solenoid valve

Slip control signal *1

I5JB0A510157-03

5A-12 Automatic Transmission/Transaxle:

Brake Interlock System Description

S5JB0A5101005

Shift Lock Solenoid Control
This system consists of shift lock solenoid control
system and interlock cable control system.
The shift lock solenoid control system is so designed
that the select lever can not be shifted from “P” range
position unless the ignition switch is turned ON and the
brake pedal is depressed. And the interlock cable control
system is so designed that the select lever cannot be
shifted from “P” range position unless the ignition switch
is turned to ACC or ON position. Also, the ignition key
cannot be pulled out of the key slot unless the select
lever is in “P” range.

A/T Diagnosis General Description

S5JB0A5101006

This vehicle is equipped with an electronic transmission
control system, which control the automatic shift up and
shift down timing, TCC operation, etc. suitably to vehicle
driving conditions.
TCM has an On-Board Diagnosis system which detects
a malfunction in this system and abnormality of those
parts that influence the engine exhaust emission.
When diagnosing a trouble in the transmission including
this system, be sure to have full understanding of the
outline of “On-Board Diagnostic System Description” and
each item in “Precautions in Diagnosing Trouble” and
execute diagnosis according to “A/T System Check” to
obtain correct result smoothly.

NOTE
There are two type of On-Board Diagnostic
System, vehicle without engine diagnosis
connector (1) and vehicle with engine
diagnosis connector, depending on vehicle
specifications. Identify the type of system for
vehicle being serviced by whether the vehicle
equipped with engine diagnosis connector
on main harness or not.

On-Board Diagnostic System Description

S5JB0A5101007

For Vehicle without Engine Diagnosis Connector
For automatic transmission control system, TCM has the
following functions. Refer to “Inspection of TCM and Its
Circuits”.
• When the ignition switch is turned ON with the engine

at a stop, malfunction indicator lamp (MIL) (1) turns
ON to check the bulb of the MIL.

• When TCM detects a malfunction in A/T control

system TCM desires turning on malfunction indicator
lamp (MIL) and stores malfunction DTC in TCM
memory.
(If it detects that continuously 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 (2) by

using not only SUZUKI scan tool (3) but also OBD
generic scan tool. (Diagnostic information can be
checked and erased by using a scan tool.)

1

I5JB0A510010-01

1

2

3

I5JB0A510011-01

Automatic Transmission/Transaxle: 5A-13

2 Driving cycle detection logic
The malfunction detected in the first driving cycle is
stored in TCM memory (in the form of pending DTC and
freeze frame data) but the malfunction indicator lamp
does not light at this time. It lights up at the second
detection of same malfunction also in the next driving
cycle.

Pending DTC
Pending DTC means a DTC detected and stored
temporarily at 1 driving cycle of the DTC which is
detected in the 2 driving cycle detection logic.

Freeze frame data
TCM stores the engine and driving conditions at the
moment of the detection of a malfunction in its memory.
This data is called “Freeze frame data”.
Therefore, it is possible to know engine and driving
conditions (e.g., whether the engine was warm or not,
where the vehicle was running or stopped) when a
malfunction was detected by checking the freeze frame
data.

For Vehicle with Engine Diagnosis Connector
For automatic transmission control system, TCM has the
following functions. Refer to “Inspection of TCM and Its
Circuits”.
• When ignition switch is turned ON with no malfunction

in A/T control system is detected, transmission
warning light (1) lights for about 2 seconds after
ignition switch is turned ON and then goes OFF for
bulb check.

• When TCM detects a malfunction in A/T control

system, it indicates transmission warning light (1) and
stores malfunction DTC in its memory.

• It is possible to communicate with TCM through data

link connector (DLC) (3) by using SUZUKI scan tool
(2). Diagnostic information can be checked and
erased by using SUZUKI scan tool.

• It is also possible to output DTC stored in TCM by

displaying DTC on digital display odometer (6) with
diagnosis switch terminal (5) of monitor connector (4)
grounded. If no DTC is stored in TCM memory, DTC
0000 is outputted repeatedly. If one or more DTCs are
stored in TCM memory, they are outputted starting
from smallest code number in increasing order. After
all DTCs are outputted, they are outputted again in the
same manner.

2 Driving cycle detection logic
The malfunction detected in the first driving cycle is
stored in TCM memory (in the form of pending DTC and
freeze frame data) but the malfunction indicator lamp
does not light at this time. It lights up at the second
detection of same malfunction also in the next driving
cycle.

Pending DTC
Pending DTC means a DTC detected and stored
temporarily at 1 driving cycle of the DTC which is
detected in the 2 driving cycle detection logic.

1

6

3

5

4

I5JB0A510012-01