Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 82

 

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Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 82

 

 

5A-27 Automatic Transmission/Transaxle: 

DTC P1875: 4L Switch Circuit Malfunction (Open)

S5JB0E5104045

Wiring Diagram
Refer to “DTC P1874: 4L Switch Circuit Malfunction (Short)”.

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 transfer position switch to “4L” position.
4) Keep engine running at idle speed for 10 seconds or more with select lever “D” range.
5) Start vehicle and increase vehicle speed to about 50 km/h (31 mile/h) in “4L” position for 2 minutes.
6) Stop vehicle.
7) Check DTC, pending DTC and freeze-frame data.

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 (scan tool)
“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 
in related manual”. 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 
in related manual”. If 
OK, substitute a known-
good TCM and recheck.

Go to Step 6.

6

4L/N switch check
1) Check 4WD low switch for operation referring to 

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

Is check result satisfactory?

4L/N circuit is shorted to 
ground. If wire and 
connections are OK, 
substitute a known-
good TCM and recheck.

Replace 4L/N switch.

Step

Action

Yes

No

DTC Detecting Condition

Trouble Area

Actual transfer position is 4L although TCM detected low switch is 
turned OFF with vehicle speed between 29 km/h (18 mile/h) and 
88 km/h (55 mile/h). (if equipped with 4L/N switch)
(1 driving cycle detection logic)

• 4L/N switch or its circuit.
• TCM

Automatic Transmission/Transaxle:  5A-28

DTC Troubleshooting

Inspection of TCM and Its Circuits

S5JB0E5104049

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 in 

related manual”.

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).

Step

Action

Yes

No

1

Vehicle speed signal check
1) Check DTC in ECM and ABS/ESP

® control module 

referring to “DTC Check in Section 1A in related manual” 
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/ESP

®

 

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 in related 
manual”.

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 
in related manual”. 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 
in related manual”. 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.

5A-29 Automatic Transmission/Transaxle: 

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

Terminal Wire color

Circuit

Standard 

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 (+)

*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.)

5

GRN/YEL

TCC pressure control 
solenoid valve (+)

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

Waveform 

No. 2: ”)

Engine running at idling.
(Output signal is duty pulse. Duty ratio varies 
depending on torque converter clutch operating 
condition.)

6

BLK/WHT Power source

10 – 14 V Ignition switch ON

7

WHT

CAN communication 
line (Low)

*2.5 – 3.6 V

↑↓

1.6 – 2.5 V

(“Reference 

Waveform 

No. 3: ”)

Engine running at idling with after warming up.
(CAN communication signal is pulse. Pulse signal 
frequency varies depending on engine condition.))

8

9

10

YEL/BLK

3 position switch (–)

0 – 1 V

Ignition switch ON

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

Automatic Transmission/Transaxle:  5A-30

Connector “E93”

11

YEL/BLK

Transmission fluid 
temperature sensor (+)

2.9 – 3.1 V Ignition switch ON, fluid temperature is 20 

°C (68 °F)

0.3 – 0.5 V Ignition switch ON, fluid temperature is 100 

°C (212 °F)

12

ORN

Transmission fluid 
temperature sensor (–)

0 – 1 V

Ignition switch ON

13

14

15

GRN/RED

Shift solenoid valve-B 
(No.2)

9 – 14 V

Ignition switch ON, select lever in “P” range

16

GRN

Shift solenoid valve-A 
(No.1)

9 – 14 V

Ignition switch ON, select lever in “P” range

17

RED

CAN communication 
line (High)

*2.5 – 3.6 V

↑↓

1.6 – 2.5 V

(“Reference 

Waveform 

No. 3: ”)

Engine running at idling with after warming up.
(CAN communication signal is pulse. Pulse signal 
frequency varies depending on engine condition.)

18

19

20

YEL/RED 3 position switch (+)

2.4 – 4.3 V

Ignition switch ON, select lever in “P”, “R”, “N” or “D” 
range

0.8 – 2.4 V Ignition switch ON, select lever in “3”, “2” or “L” range

21

22

23

BLK

Ground

0 – 1 V

Ignition switch ON

24

WHT

Power source for back-
up

10 – 14 V Constantly

Terminal Wire color

Circuit

Standard 

voltage

Condition

1

RED

Transmission range 
sensor (“R” range)

8 – 14 V

Ignition switch ON, selector lever at “R” range

0 – 1 V

Ignition switch ON, selector lever at other than “R” 
range

2

3

4

PNK/WHT

4L/N switch (if 
equipped)

8 – 14 V

Ignition switch ON, transfer position in 4H

0 – 1 V

Ignition switch OFF, transfer position in 4L and N

5

WHT

Output shaft speed 
sensor (+)

0 – 1 V

Ignition switch ON, engine stops

*(“Referenc

e Waveform 

No. 4: ”)

While engine running.
(Output signal is waveform. Waveform frequency varies 
depending on output shaft speed. (18 pulses are 
generated par 1 input shaft revolution.))

6

BLU

Input shaft speed 
sensor (+)

0 – 1 V

Ignition switch ON, engine stops.

*(“Referenc

e Waveform 

No. 5: ”)

While engine running.
(Output signal is waveform. Waveform frequency varies 
depending on output shaft speed. (24 pulses are 
generated par 1 input shaft revolution.))

7

GRN

Transmission range 
sensor (“D” range)

8 – 14 V

Ignition switch ON, selector lever at “D” range

0 – 1 V

Ignition switch ON, selector lever at other than “D” 
range

8

GRN/ORN

Transmission range 
sensor (“N” range)

8 – 14 V

Ignition switch ON, selector lever at “N” range

0 – 1 V

Ignition switch ON, selector lever at other than “N” 
range

9

10

11

12

PNK/BLK Diagnosis switch

8 – 14 V

Ignition switch ON

13

Terminal Wire color

Circuit

Standard 

voltage

Condition

 

 

 

 

 

 

 

Content   ..  80  81  82  83   ..