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Suzuki Grand Vitara JB627. Manual - part 52

1A-157 Engine General Information and Diagnosis:

DTC P2135: Throttle Position Sensor (Main / Sub) Voltage Correction

S6JB0B1104065

Wiring Diagram

APP sensor check
1) Check APP sensor for performance referring to

“Accelerator Pedal Position (APP) Sensor Assembly On-
Vehicle Inspection in Section 1C”.

Is it in good condition?

Substitute a known
good ECM and recheck.

Replace APP sensor
assembly.

Step

Action

Yes

BLU/BLK

BLK/RED

BLU

12V 5V

E23-8

E23-16
E23-2
E23-3

WHT/GRN

C37-59

C37-58

C37-39

C37-73

C37-80

BLK/YEL

BLK/ORN

BLK/YEL
BLK/YEL

3 2

1110

E23

C37

BLK/ORN

C37-81

BLK/YEL

BLK/WHT

BLU/ORN

GRN

BLU/YEL

BLU/RED

BLU/BLK

E23-6

E23-7

E23-5
E23-4

C37-45

C37-46

C37-65

C37-64

BLU/RED

WHT

GRN

RED

BLK

11 10 9

I6JB01110056-05

1: Electric throttle body assembly

6: ECM

11: “IGN” fuse

2: Throttle actuator

7: Main relay

12: “IG COIL” fuse

3: Throttle position sensor (main)

8: Fuse box No.2

13: Ignition switch

4: Throttle position sensor (sub)

9: “THR MOT” fuse

5: Throttle actuator control relay

10: “FI” fuse

Engine General Information and Diagnosis: 1A-158

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check DTC by using scan tool.

DTC Troubleshooting

DTC detecting condition

Trouble area

Index of correlation between main throttle position sensor and sub
throttle position sensor (main throttle position sensor voltage plus sub
throttle position sensor voltage minus 4.9 V) is more than 0.2 V.
(1 driving cycle detection logic)

• TP sensor (main and sub) circuit
• Electric throttle body assembly
• ECM

Step

Action

Yes

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check”.

TP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ON ignition switch, check “TP Sensor 1 Volt” and

“TP Sensor 2 Volt” displayed on scan tool when
accelerator pedal is idle position and fully depressed.

Is displayed TP sensor value as described voltage in “Scan
Tool Data”?

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

Go to Step 3.

TP sensor check
1) Check TP sensor for performance referring to “Electric

Throttle Body Assembly On-Vehicle Inspection in
Section 1C”.

Is it in good condition?

Go to Step 4.

Replace electric throttle
body assembly.

Wire harness check
1) Check TP sensor (main and sub) circuit for condition.

For TP sensor (main) circuit, referring to Step 3 of “DTC
P0122 / P0123: Throttle Position Sensor (Main) Circuit
Low / High Input”.
For TP sensor (sub) circuit, referring to Step 3 of “DTC
P0222 / P0223: Throttle Position Sensor (Sub) Circuit
Low/High”.

Is it in good condition?

Substitute a known
good ECM and recheck.

Repair or replace.

1A-159 Engine General Information and Diagnosis:

DTC P2138: Pedal Position Sensor (Main / Sub) Voltage Correction

S6JB0B1104066

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

3 2

1110

E23

C37

E23-26

E23-27

5 V

WHT/BLU

ORN

5 V

E23-25

WHT

E23-33

E23-34

E23-35

ORN/BLU

BLU/GRN

BLU/YEL

I6JB01110061-02

P: APP sensor (main) power supply circuit

S1: APP sensor (sub) signal circuit

3: APP sensor (sub)

S: APP sensor (main) signal circuit

G1: APP sensor (sub) ground circuit

4: ECM

G: APP sensor (main) ground circuit

1: APP sensor assembly

5: Ground of APP sensor for shield wire

P1: APP sensor (sub) power supply circuit

2: APP sensor (main)

DTC detecting condition

Trouble area

Index of correlation between the main accelerator pedal position sensor and
sub accelerator pedal position sensor (1/2 main accelerator pedal position
sensor voltage minus sub accelerator pedal position sensor voltage) is more
than 0.28 V.
(1 driving cycle detection logic)

• APP sensor and its circuit
• ECM

Engine General Information and Diagnosis: 1A-160

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

Step

Action

Yes

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check”.

TP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ON ignition switch, check “APP Sensor 1 Volt” and

“APP Sensor 2 Volt” displayed on scan tool when
accelerator pedal is idle position and fully depressed.

Is displayed each APP sensor value as described voltage in
“Scan Tool Data”?

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

Go to Step 3.

APP sensor check
1) Check APP sensor for performance referring to

“Accelerator Pedal Position (APP) Sensor Assembly On-
Vehicle Inspection in Section 1C”.

Is it in good condition?

Go to Step 4.

Replace APP sensor
assembly.

Wire harness check
1) Check APP sensor (main and sub) circuit for condition.

For APP sensor (main) circuit, referring to Step 4 of
“DTC P2122 / P2123: Pedal Position Sensor (Main)
Circuit Low / High”.
For TP sensor (sub) circuit, referring to Step 4 of “DTC
P2127 / P2128: Pedal Position Sensor (Sub) Circuit Low
/ High”.

Is it in good condition?

Substitute a known
good ECM and recheck.

Repair or replace.

Content .. 50 51 52 53 ..