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
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