Suzuki Grand Vitara JB627. Manual — part 223

5A-76 Automatic Transmission/Transaxle:

DTC Troubleshooting

NOTE
Upon completion of inspection and repair work, perform “Intermittent and Poor Connection Inspection
in Section 00” and confirm that the trouble has been corrected.

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

Control module connector check
1) Check connection of connectors of all control modules

communicating by means of CAN.

2) Recheck DTC in TCM.

Is there DTC U0073?

Go to Step 3.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

3

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules

communicating by means of CAN.

3) Check CAN communication circuit between control

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Go to Step 4.

Repair circuit.

4

DTC check
1) Turn ignition switch to OFF position.
2) Connect connectors of disconnected control modules

communicating by means of CAN.

3) Disconnect connector of any one of control module other

than TCM.

4) Recheck DTC for TCM.

Is DTC U0073 detected?

Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 3)
one by one and check
that DTC U0073 is
detected by TCM each
time connector is
disconnected. When
DTC U0073 is not
detected by TCM while
checking in this way, go
to description under
“NO” below. If DTC
U0073 is detected by
TCM even when
connectors of all control
modules that use CAN
communication with
TCM are disconnected,
substitute a known good
TCM and recheck.

Check power and
ground circuit of control
module disconnected in
Step 3). If circuit is OK,
substitute a known good
control module
disconnected in Step 3)
and recheck.

Automatic Transmission/Transaxle: 5A-77

DTC U0100: Lost Communication with ECM

S6JB0B5104047

Wiring Diagram
Refer to “DTC U0073: Control Module Communication Bus Off”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC and pending DTC.

DTC Troubleshooting

NOTE
Upon completion of inspection and repair work, perform “Intermittent and Poor Connection Inspection
in Section 00” and confirm that the trouble has been corrected.

DTC Detecting Condition

Trouble Area

Reception error of communication data for ECM is detected for
longer than specified time continuously.
(1 driving cycle detection logic)

• ECM
• ABS or ESP

® control module

• TCM
• CAN communication line circuit

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

Control module connector check
1) Check connection of connectors of all control modules

communicating by means of CAN.

2) Recheck DTC in TCM.

Is there DTC U0100?

Go to Step 3.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

3

DTC check in ABS or ESP

® control module

1) Check DTC in ABS or ESP

® control module.

Is there DTC U1100?

Go to Step 4.

Go to Step 5.

4

DTC check
1) Check DTC in ECM.

Is there DTC U0073?

Go to “DTC U0073:
Control Module
Communication Bus Off
in Section 1A”.

Check ECM power and
ground circuit. If circuit
is OK, CAN
communication circuit
between ECM and ABS
or ESP

® control module

is open circuit.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules

communicating by means of CAN.

3) Check CAN communication circuit between control

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Check TCM power and
ground circuit. If circuit
is OK, substitute a
known-good TCM and
recheck.

Repair circuit.

5A-78 Automatic Transmission/Transaxle:

DTC U0140: Lost Communication with Body Control Module

S6JB0B5104048

Wiring Diagram
Refer to “DTC U0073: Control Module Communication Bus Off”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC and pending DTC.

DTC Troubleshooting

NOTE
Upon completion of inspection and repair work, perform “Intermittent and Poor Connection Inspection
in Section 00” and confirm that the trouble has been corrected.

DTC Detecting Condition

Trouble Area

Reception error of communication data for BCM is detected for
longer than specified time continuously.
(1 driving cycle detection logic but MIL does not light up)

• BCM
• TCM
• CAN communication line circuit

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

Control module connector check
1) Check connection of connectors of all control modules

communicating by means of CAN.

2) Recheck DTC in TCM.

Is there DTC U0140?

Go to Step 3.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

3

DTC check in BCM (bus off)
1) Check DTC in BCM.

Is there DTC U1073?

Go to “DTC U1073 (No.
1073): Control Module
Communication Bus Off
in Section 10B”.

Go to Step 4.

4

DTC check
1) Check DTC in ECM.

Is there DTC U0140?

Check BCM power and
ground circuit. If circuit
is OK, substitute a
known-good BCM and
recheck.

Go to Step 5.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules

communicating by means of CAN.

3) Check CAN communication circuit between control

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Check TCM power and
ground circuit. If circuit
is OK, substitute a
known-good TCM and
recheck.

Repair circuit.

Automatic Transmission/Transaxle: 5A-79

Inspection of TCM and Its Circuits

S6JB0B5104049

TCM and its circuits can be checked at TCM wiring connectors by measuring voltage, pulse signal and resistance.

CAUTION

!

TCM cannot be checked by itself, it is strictly prohibited to connect voltmeter or ohmmeter to TCM with
connector disconnected from it.

1) Remove TCM (1) from vehicle referring to “Transmission Control Module (TCM) Removal and Installation”.
2) Connect TCM connectors (2) to TCM.
3) Check voltage and/or pulse signal at each terminal of connectors connected using voltmeter (3) and oscilloscope

(4).

NOTE

• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition

switch is ON.

• Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with

oscilloscope if necessary.

Terminal arrangement of TCM coupler (Viewed from harness side)

Connector “E92”

3. Body ground

3

4

1

2

I4RS0A510021-02

6

5

16 15 14 13 12 11

4 3

24 23

21

22

10 9

8

7

2

1

19

20

18 17

E92

17 16

26 25

15 14

6

5

3

4

2

13 12

23 22

24

11 10 9

21 20 19

8 7

18

1

E93

I5JB0A510151-01

Terminal

number

Wire color

Circuit

Normal

Voltage

Condition

1

BLK/ORN Ground

0 – 1 V

Ignition switch ON

2

BRN/RED

Pressure control
solenoid valve (–)

0.6 – 1.0 V Ignition switch ON

3

PPL/WHT

TCC pressure control
solenoid valve (–)

0.6 – 1.0 V Ignition switch ON

4

YEL/RED

Pressure control
solenoid valve-A (+)

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference

Waveform

No. 1: ”)

Engine running at idling.
(Output signal is duty pulse. Duty ratio varies
depending on throttle valve opening.)