Suzuki GSX-R1000. Service Manual - part 7

1A-34 Engine General Information and Diagnosis: 

Step

Action

Yes

No

1

5) If OK, then check the continuity between each terminal 

and ground.

Special tool

(A):  09900–25008 (Multi circuit tester set)

CKP sensor continuity

∞

 

Ω

 (Infinity) (B – Ground, Bl/Y– Ground)

Are the resistance and continuity OK?

Go to Step 2.

Replace the CKP 
sensor with a new one.

2

1) Crank the engine several seconds with the starter motor, 

and measure the CKP sensor peak voltage at the 
coupler.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

CKP sensor peak voltage
0.5 V and more
((+) terminal: B – (–) terminal: Bl/Y)

2) Repeat the 1) test procedures several times and 

measure the highest peak voltage.

Is the voltage OK?

• B or Bl/Y wire of the 

harness side open or 
shorted to ground.

• Loose or poor 

contacts on the CKP 
sensor coupler or 
ECM coupler 
(Terminal “9” or “21”).

• If the wires and 

connection are OK, 
intermittent trouble or 
faulty ECM.

• Recheck each 

terminal and wire 
harness for open 
circuit and poor 
connection.

• Replace the ECM 

with a known good 
one, and inspect it 
again. Refer to “ECM 
Removal and 
Installation” in 
Section 1C 
(Page 1C-1).

• Inspect that metal 

particles or foreign 
material stuck on the 
CKP sensor and rotor 
tip.

• If there are no metal 

particles and foreign 
material, then replace 
the CKP sensor with 
a new one. Refer to 
“CKP Sensor 
Removal and 
Installation” in 
Section 1C 
(Page 1C-2).

(A)

I947H1110014-01

V

Peakvolt
adaptor

(A)

I947H1110015-01

Engine General Information and Diagnosis:  1A-35

DTC “C13” (P0105-H/L): IAP Sensor Circuit Malfunction

B947H11104012

Detected Condition and Possible Cause

Wiring Diagram

ECM coupler (Harness side)

Troubleshooting

CAUTION

!

 

When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a 
needle pointed tester probe to prevent terminal damage.

 

NOTE

After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset 
Procedures” (Page 1A-14).

 

Detected Condition

Possible Cause

C13

IAP sensor voltage is not within the 
following range.
0.5 V 

≤

 Sensor voltage < 4.85 V

NOTE

Note that atmospheric pressure 
varies depending on weather 
conditions as well as altitude.
Take that into consideration 
when inspecting voltage.

 

• Clogged vacuum passage between throttle body and 

IAP sensor.

• Air being drawn from vacuum passage between throttle 

body and IAP sensor.

• IAP sensor circuit open or shorted to ground.

• IAP sensor malfunction.

• ECM malfunction.

P0105

H

Sensor voltage is higher than specified 
value.

• IAP sensor circuit is open or shorted to VCC or ground 

circuit open.

L

Sensor voltage is lower than specified 
value.

• IAP sensor circuit is shorted to ground or VCC circuit 

open.

ECM

R

IAPS

E2

VCC

IAP sensor

G/B

B/Br

35

7

19

I837H1110010-01

1

2

3

4

5

6

7

8

9 10 11 12

13 14 15 16 17 18 19 20 21 22 23 24

25 26 27 28 29 30 31 32 33 34 35 36

37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70 71 72

I837H1110007-02

1A-36 Engine General Information and Diagnosis: 

C13 (Use of mode select switch)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the IAP sensor coupler (1) for loose or poor 

contacts.
If OK, then measure the IAP sensor input voltage.

4) Disconnect the IAP sensor coupler.

5) Turn the ignition switch ON.

6) Measure the input voltage between the R wire and 

ground.
If OK, then measure the voltage between the R wire and 
B/Br wire.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

IAP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R 
– (–) terminal: B/Br)

Is the voltage OK?

Go to Step 3.

• Loose or poor 

contacts on the ECM 
coupler.

• Open or short circuit 

in the R or B/Br wire.

1

I947H1110016-01

(A)

V

I823H1110016-05

Engine General Information and Diagnosis:  1A-37

P0105-H for IAP sensor (Use of SDS)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the IAP sensor coupler (1) for loose or poor 

contacts.
If OK, then check the IAP sensor lead wire continuity.

4) Disconnect the IAP sensor coupler.

5) Check the continuity between the R wire and G/B wire.

If the sound is not heard from the tester, the circuit 
condition is OK.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Continuity (

)

6) Disconnect the ECM couplers. Refer to “ECM Removal 

and Installation” in Section 1C (Page 1C-1).

7) Insert the needle pointed probes to the lead wire coupler.

Go to Step 3.

G/B wire shorted to 
VCC, or B/Br wire open.

1

I947H1110017-01

(A)

I823H1110017-05

1A-38 Engine General Information and Diagnosis: 

Step

Action

Yes

No

1

8) Check the continuity between the G/B wire and terminal 

“19”.
If OK, then check the continuity between the B/Br wire 
and terminal “35”.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Continuity test (

)

ECM couplers (Harness side)

Is the continuity OK?

Go to Step 3.

G/B wire shorted to 
VCC, or B/Br wire open.

?

(Black)

(Gray)

“19”

“35”

(A)

(B)

I837H1110017-01

Engine General Information and Diagnosis:  1A-39

P0105-L for IAP sensor (Use of SDS)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the IAP sensor coupler (1) for loose or poor 

contacts.
If OK, then check the IAP sensor lead wire continuity.

4) Disconnect the IAP sensor coupler.

5) Check the continuity between the G/B wire and ground. 

Also, check the continuity between the G/B wire and B/
Br wire. If the sound is not heard from the tester, the 
circuit condition is OK.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Continuity (

)

6) Disconnect the ECM couplers. Refer to “ECM Removal 

and Installation” in Section 1C (Page 1C-1).

7) Insert the needle pointed probes to the lead wire coupler.

Go to Step 2.

R and G/B wire open, G/
B wire shorted to 
ground.

1

I947H1110018-01

(A)

I823H1110019-02

1A-40 Engine General Information and Diagnosis: 

Step

Action

Yes

No

1

8) Check the continuity between the R wire and terminal 

“7”. Also, check the continuity between the G/B wire and 
terminal “19”.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Continuity (

)

ECM couplers (Harness side)

Is the continuity OK?

Go to Step 2.

R and G/B wire open, G/
B wire shorted to 
ground.

2

1) Connect the ECM couplers.

2) Turn the ignition switch ON.

3) Measure the input voltage between the R wire and 

ground.
If OK, then measure the voltage between the R wire and 
B/Br wire.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

IAP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R 
– (–) terminal: B/Br)

Is the voltage OK?

Go to Step 3.

• Loose or poor 

contacts on the ECM 
coupler.

• Open or short circuit 

in the R or B/Br wire.

(Black)

(Gray)

?

“7”

“19”

(A)

(B)

I837H1110019-02

(A)

V

I823H1110016-05

Engine General Information and Diagnosis:  1A-41

3

1) Turn the ignition switch OFF.

2) Connect the ECM couplers and IAP sensor coupler.

3) Insert the needle pointed probes to the lead wire coupler.

4) Run the engine at idle speed and measure the IAP 

sensor output voltage between the G/B wire and B/Br 
wire.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Voltage (

)

IAP sensor output voltage
Approx. 2.7 V at idle speed
((+) terminal: G/B – (–) terminal: B/Br)

Is the voltage OK?

Go to Step 4.

• Check the vacuum 

hose for crack or 
damage.

• Open or short circuit 

in the G/B wire.

• If vacuum hose and 

wire are OK, replace 
the IAP sensor with a 
new one. Refer to 
“IAP Sensor Removal 
and Installation” in 
Section 1C 
(Page 1C-2).

Step

Action

Yes

No

V

(A)

(B)

I947H1110020-01

1A-42 Engine General Information and Diagnosis: 

4

1) Turn the ignition switch OFF.

2) Remove the IAP sensor. Refer to “IAP Sensor Removal 

and Installation” in Section 1C (Page 1C-2).

3) Connect the vacuum pump gauge to the vacuum port of 

the IAP sensor.

4) Arrange 3 new 1.5 V batteries (1) in series (check that 

total voltage is 4.5 – 5.0 V) and connect (–) terminal to 
the ground terminal “B” and (+) terminal to the VCC 
terminal “A”.

5) Check the voltage between Vout terminal “C” and 

ground. Also, check if voltage reduces when vacuum is 
applied by using vacuum pump gauge.

Special tool

(A):  09917–47011 (Vacuum pump gauge set)
(B):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

Is the voltage OK?

• G/B, R or B/Br wire 

open or shorted to 
ground, or poor “19”, 
“7” or “35” 
connection.

• If wire and 

connection are OK, 
intermittent trouble or 
faulty ECM.

• Recheck each 

terminal and wire 
harness for open 
circuit and poor 
connection.

• Replace the ECM 

with a known good 
one, and inspect it 
again. Refer to “ECM 
Removal and 
Installation” in 
Section 1C 
(Page 1C-1).

If check result is not 
satisfactory, replace the 
IAP sensor with a new 
one. Refer to “IAP 
Sensor Removal and 
Installation” in Section 
1C (Page 1C-2).

Step

Action

Yes

No

1

(A)

“C”

“A”

“B”

(B)

I718H1110030-02

760 – 707

707 – 634

634 – 567

567 – 526

100 – 94

94 – 85

85 – 76

76 – 70

3.1 – 3.6

2.8 – 3.4

2.6 – 3.1

2.4 – 2.9

ALTITUDE (Reference)

ATOMOSPHERIC

PRESSURE

OUTPUT

VOLTAGE

mmHg

kPa

V

0 – 2 000

2 001 – 5 000

5 001 – 8 000

8 001 – 10 000

ft

0 – 610

611 – 1 524

1 525 – 2 438

2 439 – 3 048

m

I823H1110023-02

Engine General Information and Diagnosis:  1A-43

DTC “C14” (P0120-H/L): TP Sensor Circuit Malfunction

B947H11104013

Detected Condition and Possible Cause

Wiring Diagram

ECM coupler (Harness side)

Troubleshooting

CAUTION

!

 

When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a 
needle pointed tester probe to prevent terminal damage.

 

NOTE

After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset 
Procedures” (Page 1A-14).

 

Detected Condition

Possible Cause

C14

Output voltage is not within the following 
range.
Difference between actual throttle opening 
and opening calculated by ECM is larger 
than specified value.
0.2 V 

≤

 Sensor voltage < 4.8 V

• TP sensor maladjusted.

• TP sensor circuit open or short.

• TP sensor malfunction.

• ECM malfunction.

P0120

H

Sensor voltage is higher than specified 
value.

• TP sensor circuit is shorted to VCC or ground circuit is 

open.

L

Sensor voltage is lower than specified 
value.

• TP sensor circuit is open or shorted to ground or VCC 

circuit is open.

ECM

R

R

B/Br

B/Br

VCC

TPS

E2

P/B

P/B

TP sensor

7

6

35

I947H1110117-01

1

2

3

4

5

6

7

8

9 10 11 12

13 14 15 16 17 18 19 20 21 22 23 24

25 26 27 28 29 30 31 32 33 34 35 36

37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70 71 72

I837H1110007-02

1A-44 Engine General Information and Diagnosis: 

C14 (Use of mode select switch)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the TP sensor couplers (1) and (2) for loose or 

poor contacts.
If OK, then measure the TP sensor input voltage.

4) Disconnect the TP sensor coupler (1).

5) Turn the ignition switch ON.

6) Measure the input voltage between the R wire and 

ground. Also, measure the voltage between the R wire 
and B/Br wire.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

TP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R 
– (–) terminal: B/Br)

Is the voltage OK?

Go to Step 3.

• Loose or poor 

contacts on the ECM 
coupler.

• Open or short circuit 

in the R wire or B/Br 
wire.

1

2

I947H1110021-02

V

(A)

I947H1110045-01

Engine General Information and Diagnosis:  1A-45

P0120-H (Use of SDS)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the TP sensor couplers (1) and (2) for loose or 

poor contacts.
If OK, then check the TP sensor lead wire continuity.

4) Disconnect the TP sensor couplers (1) and (2).

5) Check the continuity between the P/B wire and R wire.

If the sound is not heard from the tester, the circuit 
condition is OK.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Continuity (

)

6) Disconnect the ECM couplers. Refer to “ECM Removal 

and Installation” in Section 1C (Page 1C-1).

Go to Step 3.

P/B wire shorted to 
VCC, or B/Br wire open.

1

2

I947H1110022-02

(A)

I947H1110118-01

1A-46 Engine General Information and Diagnosis: 

Step

Action

Yes

No

1

7) Check the continuity between the P/B wire and terminal 

“6”. Also, check the continuity between the B/Br wire and 
terminal “35”.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Continuity test (

)

ECM couplers (Harness side)

Is the continuity OK?

Go to Step 3.

P/B wire shorted to 
VCC, or B/Br wire open.

(Black)

(Gray)

?

“35”

(A)

(B)

“6”

I947H1110119-01

Engine General Information and Diagnosis:  1A-47

P0120-L (Use of SDS)

Step

Action

Yes

No

1

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. Refer to “Fuel Tank 

Removal and Installation” in Section 1G (Page 1G-9).

3) Check the TP sensor couplers (1) and (2) for loose or 

poor contacts.
If OK, then check the TP sensor lead wire continuity.

4) Disconnect the TP sensor couplers (1) and (2).

5) Check the continuity between the P/B wire and ground. 

Also, check the continuity between the P/B wire and B/Br 
wire.
If the sound is not heard from the tester, the circuit 
condition is OK.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Continuity test (

)

6) Disconnect the ECM couplers. Refer to “ECM Removal 

and Installation” in Section 1C (Page 1C-1).

Go to Step 2.

R or P/B wire open, or 
Y/W wire shorted to 
ground.

1

2

I947H1110023-02

(A)

I947H1110120-01

1A-48 Engine General Information and Diagnosis: 

Step

Action

Yes

No

1

7) Check the continuity between the P/B wire and terminal 

“6”. Also, check the continuity between the R wire and 
terminal “7”.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Continuity test (

)

ECM couplers (Harness side)

Is the continuity OK?

Go to Step 2.

R or P/B wire open, or 
Y/W wire shorted to 
ground.

2

1) Connect the ECM couplers.

2) Turn the ignition switch ON.

3) Measure the input voltage between the R wire and 

ground. Also, measure the input voltage between the R 
wire and B/Br wire.

Special tool

(A):  09900–25008 (Multi circuit tester set)

Tester knob indication
Voltage (

)

TP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R 
– (–) terminal: B/Br)

Is the voltage OK?

Go to Step 3.

Open or short circuit in 
the R or B/Br wire.

(Black)

(Gray)

?

(B)

(A)

“7”

“6”

I947H1110121-02

V

(A)

I947H1110122-01

Engine General Information and Diagnosis:  1A-49

3

1) Turn the ignition switch OFF.

2) Connect the ECM couplers and TP sensor couplers.

3) Insert the needle point probes to the lead wire coupler.

4) Turn the ignition switch ON.

5) Measure the TP sensor output voltage between the P/B 

wire (+) and B/Br wire (–) with turning the throttle grip 
open and close.

Special tool

(A):  09900–25008 (Multi circuit tester set)
(B):  09900–25009 (Needle-point probe set)

Tester knob indication
Voltage (

)

TP sensor output voltage
Throttle valve is closed: Approx. 1.1 V
Throttle valve is opened: Approx. 4.4 V
((+) terminal: P/B – (–) terminal: B/Br)

Is the voltage OK?

• P/B, R or B/Br wire 

open or shorted to 
ground, or poor “6”, 
“7” or “35” 
connection.

• If wire and 

connection are OK, 
intermittent trouble or 
faulty ECM.

• Recheck each 

terminal and wire 
harness for open 
circuit and poor 
connection.

• Replace the ECM 

with a known good 
one, and inspect it 
again. Refer to “ECM 
Removal and 
Installation” in 
Section 1C 
(Page 1C-1).

If check result is not 
satisfactory, replace TP 
sensor with a new one. 
Refer to “Throttle Body 
Disassembly and 
Assembly” in Section 
1D (Page 1D-11).

Step

Action

Yes

No

V

(A)

(B)

I947H1110123-01