Infiniti Q45 (FY33). Manual - part 96

SBR663D

Diagnostic Procedure 15 (THROTTLE POSI
SEN2: Secondary throttle position sensor
signal input circuit)

Code No. 12 of TAC module

SBR664D

SBR158DA

1. Disconnect TAC module connectors.

Check terminals for damage or loose
connections. Then reconnect connec-
tors.

2. Carry out self-diagnosis again.

Do SLIP indicator and TCS OFF indi-
cator activate again?

Yes

E

No

Inspection end

POWER SUPPLY FOR SECONDARY
THROTTLE POSITION SENSOR

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Check voltage between terminal

q

3

for

secondary throttle position sensor connec-
tor and ground when ignition switch is
“ON”.
Voltage: Approx. 5V

OK

E

NG

Repair harness and con-
nectors between terminal

q

15

for TAC module

connector, and

q

3

second-

ary throttle position sensor.

GROUND CIRCUIT

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Check continuity between terminal

q

1

for

secondary throttle position sensor connec-
tor and ground when ignition switch is
“OFF”.
Continuity should exist.

OK

E

NG

Repair harness and con-
nectors between terminals

q

1

for TAC module

connector, and

q

1

for sec-

ondary throttle position
sensor.

I

Disconnect 20-pin connector from TAC
module.

I

Check continuity between terminal

q

3

for TAC module connector and terminal

q

2

for secondary throttle position sensor

connector.
Continuity should exist.

OK

E

NG

Repair harness and con-
nector.

CHECK SECONDARY THROTTLE POSI-
TION SENSOR.
Refer to “Removal and Installation”,
“TRACTION CONTROL SYSTEM
— TCS —”, BR-40.

OK

E

NG

Replace secondary throttle
position sensor.

Preliminary check (Basic inspection 3),
BR-48.

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

ST

RS

BT

HA

EL

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

H

H

H

H

H

BR-101

SBR388E

Diagnostic Procedure 16 (THRTL POS/S-2 SIG:
Secondary throttle valve operating signal
circuit and throttle valve opening signal circuit)

Code No. 58 of ABS/TCS control unit
Code No. 13 of TAC module

SBR548CA

SBR409E

SBR549CA

1. Disconnect TAC module connectors.

Check terminals for damage or loose
connections. Then reconnect connec-
tors.

2. Carry out self-diagnosis again.

Do SLIP indicator and TCS OFF indi-
cator activate again?

Yes

E

No

Inspection end

Does ABS/TCS control unit display code
No. 58 TCM COMM?

Yes

E

No

Inspect system referring to
code No. displayed by
ABS/TCS control unit.

SECONDARY THROTTLE VALVE OPER-
ATING SIGNAL CIRCUIT

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

I

Disconnect connector from ABS/TCS
control unit.

I

Check continuity between terminal

q

25

for ABS/TCS control unit connector and
terminal

q

12

for TAC module connector.

Continuity should exist.

OK

NG

H

I

Disconnect 20-pin connector from TAC
module.

I

Check continuity between terminal

q

12

for TAC module connector and ground.
Continuity should not exist.

OK

E

NG

Repair harness and con-
nectors.

THROTTLE VALVE OPENING SIGNAL
CIRCUIT

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

I

Check continuity between terminal

q

21

for ABS/TCS control unit connector and
terminal

q

13

for TAC module connector.

Continuity should exist.

OK

NG

H

I

Check continuity between terminal

q

13

for TAC module connector and ground.
Continuity should not exist.

OK

E

NG

Repair harness and con-
nectors.

q

A

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

H

H

H

H

H

H

BR-102

q

A

Check TAC module pin terminals for dam-
age or the connection of the control unit
harness connector.
Reconnect TAC module harness connec-
tor. Then retest.
Try self-diagnosis again. Does TAC mod-
ule display code No. 13 THRTL POS/S-
SIG again?

No

E

Yes

Replace TAC module.

Inspection end

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

ST

RS

BT

HA

EL

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

Diagnostic Procedure 16 (THRTL POS/S-2 SIG:
Secondary throttle valve operating signal
circuit and throttle valve opening signal circuit)
(Cont’d)

H

H

BR-103

SBR667D

Diagnostic Procedure 17 (THROTTLE
ACTUATOR/THROTTLE MOTOR: Throttle motor
circuit)

Code No. 21 and 22 of TAC module

SBR668D

SBR669D

1. Disconnect TAC module connectors.

Check terminals for damage or loose
connections. Then reconnect connec-
tors.

2. Carry out self-diagnosis again.

Do SLIP indicator and TCS OFF indi-
cator activate again?

Yes

E

No

Inspection end

I

Disconnect 16-pin connector from TAC
module and connector from throttle
motor.

I

Check continuity.

Continuity should exist.

OK

NG

H

THROTTLE MOTOR CIRCUIT FOR
SHORT

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

I

Check continuity between terminals

101

,

103

for TAC module connector

and ground.
Continuity should not exist.

OK

E

NG

Repair harness and con-
nectors.

I

Disconnect connector from throttle
motor.

I

Check continuity between terminals

101

and

103

for TAC module con-

nector.
Continuity should not exist.

OK

E

NG

Repair harness and con-
nectors.

CHECK THROTTLE MOTOR.
Refer to THROTTLE MOTOR in Electrical
Component Inspection, BR-127.

OK

E

NG

Replace throttle motor.

Preliminary Check (Basic inspection 3),
BR-48

TAC module

Motor

101

q

2

103

q

1

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

H

H

H

H

H

BR-104