Suzuki Grand Vitara JB416 / JB420. Manual — part 234

5A-70 Automatic Transmission/Transaxle:

DTC Troubleshooting

Step

Action

Yes

No

1

Vehicle speed signal check
1) Check DTC in ECM and ABS hydraulic unit / control

module referring to “DTC Check in Section 1A” or “DTC
Check in Section 4E”.

Is there DTC P P0500: Vehicle speed sensor (VSS)
malfunction in ECM and/or DTC C1021, C1022, C1025,
C1026, C1031, C1032, C1035 and/or C1036 in ABS
hydraulic unit / control module?

Go to applicable DTC
diag. flow.

Go to Step 2.

2

Was “A/T System Check” performed?

Go to Step 3.

Go to “A/T System
Check”.

3

Do you have SUZUKI scan tool?

Go to Step 4.

Go to Step 5.

4

4L switch and its circuit check
1) Connect SUZUKI scan tool to DLC with ignition switch

OFF.

2) Turn ignition switch ON.
3) Select “DATA LIST” mode on scan tool.
4) Check 4L/N switch signal (ON or OFF) on display when

turning transfer position switch to each position.

4L/N switch specifications
“4H” position: OFF
“4L” position: ON

Is OFF / ON displayed as described above?

Intermittent trouble or
faulty TCM. Check for
intermittent trouble
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good TCM and
recheck.

Go to Step 6.

5

4L/N switch and its circuit check
1) Turn ignition switch ON.
2) Check terminal voltage “E93-4” of TCM connector

connected when turning transfer position switch to each
position.

4L/N switch specifications
“4H” position: 10 – 14 V
“4L” position: 0 – 1 V

Is voltage as specified?

Intermittent trouble or
faulty TCM. Check for
intermittent trouble
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good TCM and
recheck.

Go to Step 6.

6

4L/N switch check
1) Check 4L/N switch for operation referring to “Transfer

Assembly Inspection: Motor-Shift Type (Transfer with
Shift Actuator) in Section 3C”.

Is check result satisfactory?

4L/N switch circuit open.
If wire and connections
are OK, substitute a
known-good TCM and
recheck.

Replace 4L/N switch.

Automatic Transmission/Transaxle: 5A-71

DTC P1878: Torque Converter Clutch Shudder

S5JB0A5104060

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and warm it up to normal operating temperature.
4) Drive vehicle with 3rd or 4th gear in “D” range and slip controlled lock-up ON for 20 seconds or longer referring to

“Automatic Gear Shift Table”.

5) Stop vehicle.
6) Check DTC, pending DTC and freeze-frame data.

DTC Troubleshooting

DTC P2763: Torque Converter Clutch (TCC) Circuit High

S5JB0A5104051

Wiring Diagram

DTC Detecting Condition

Trouble Area

The acceleration slip control function stops when the
variation in the output revolution speed of the specified
amplitude and specified cycle is detected within a specified
period of time. When the specified variation is not detected
after the acceleration slip control stops.
(20 driving cycle detection logic)

• Mismatching ATF
• Torque converter clutch malfunction
• TCM

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

1) Change A/T fluid referring to “A/T Fluid Change”.
2) Check DTC after performing “DTC Confirmation

Procedure: ”.

Is DTC P1878 still indicated?

Faulty torque converter
clutch. Replace torque
converter.

System is in good
condition.

1

2

12V

E92-3

E92-5

GRN/YEL

PPL/WHT

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

3

I5JB0A510027-01

1. TCC pressure control solenoid valve

3. Terminal arrangement of TCM connector (viewed from harness side)

2. TCM

5A-72 Automatic Transmission/Transaxle:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING

!

• When performing a road test, select a place where there is no traffic or possibility of a traffic

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out with 2 persons, a driver and tester, on a level road.

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine.
4) Keep engine running at idle speed in “P” range for 10 seconds or more.
5) Check DTC, pending DTC and freeze-frame data.

DTC Troubleshooting

DTC Detecting Condition

Trouble Area

Voltage of TCC pressure control solenoid valve TCM terminal is
high although TCM is commanding TCC pressure control solenoid
to turn OFF.
(1 driving cycle detection logic)

• TCC pressure control solenoid valve circuit

shorted to power circuit.

• Malfunction of TCC pressure control solenoid

valve.

• TCM

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

Check TCC pressure control solenoid valve circuit for
power supply short
1) Disconnect TCM connectors.
2) Check for proper connection to TCM at terminal “E92-3”

and “E92-5”.

3) If connection is OK, turn ignition switch ON and measure

voltage between terminal “E92-3” of disconnected
harness side TCM connector and ground.

Is it 0 – 2 V?

Go to Step 3.

TCC pressure control
solenoid valve circuit is
shorted to power supply
circuit. If circuit is OK,
go to Step 3.

3

Inspection TCC pressure control solenoid valve
1) Inspection TCC pressure control solenoid valve referring

to “Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B,
TCC Pressure Control Solenoid and Pressure Control
Solenoid Inspection”.

Is check results satisfactory?

Intermittent trouble or
faulty TCM. Check for
intermittent trouble
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good TCM and
recheck.

Replace TCC pressure
control solenoid valve
referring to
“Transmission Fluid
Temperature Sensor
Removal and
Installation”.

Automatic Transmission/Transaxle: 5A-73

DTC P2764: Torque Converter Clutch (TCC) Circuit Low

S5JB0A5104052

Wiring Diagram
Refer to “DTC P2763: Torque Converter Clutch (TCC) Circuit High”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING

!

• When performing a road test, select a place where there is no traffic or possibility of a traffic

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out with 2 persons, a driver and tester, on a level road.

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine.
4) Keep engine running at idle speed in “P” range for 20 seconds or more.
5) Check DTC, pending DTC and freeze-frame data.

DTC Troubleshooting

DTC Detecting Condition

Trouble Area

Voltage of TCC pressure control solenoid valve TCM terminal is
low although TCM is commanding TCC pressure control solenoid
to turn ON.
(1 driving cycle detection logic)

• TCC pressure control solenoid valve circuit

open or shorted to ground.

• Malfunction of TCC pressure control solenoid

valve

• TCM

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System
Check”.

2

Check TCC pressure control solenoid valve circuit for
ground short
1) Disconnect TCM connectors.
2) Check for proper connection to TCM at terminals “E92-

3” and “E92-5”.

3) If connection is OK, check continuity between terminal

“E92-5” of disconnected harness side TCM connector
and ground.

Is continuity indicated?

TCC pressure control
solenoid valve circuit is
shorted to ground. If
circuit is OK, go to Step
4.

Go to Step 4.

3

Check TCC pressure control solenoid valve circuit for
open
1) Check resistance between terminal “E92-3” and “E92-5”

of disconnected harness side TCM connector.

Is it infinity?

TCC pressure control
solenoid valve circuit is
open. If circuit is OK, go
to Step 4.

Go to Step 4.

4

Inspection TCC pressure control solenoid valve
1) Inspection TCC pressure control solenoid valve referring

to “Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B,
TCC Pressure Control Solenoid and Pressure Control
Solenoid Inspection”.

Is check results satisfactory?

Intermittent trouble or
faulty TCM. Check for
intermittent trouble
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good TCM and
recheck.

Replace TCC pressure
control solenoid valve
referring to “Solenoid
Valves (Shift Solenoid-
A, Shift Solenoid-B,
TCC Pressure Control
Solenoid and Pressure
Control Solenoid
Removal and
Installation”.