Infiniti Q45 (FY33). Manual — part 98
SBR043EA
Diagnostic Procedure 21 (ENGINE START SIG:
Start signal circuit)
Code No. 31 of TAC module
SBR600CD
START SIGNAL POWER SUPPLY
CHECK
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check 7.5A fuse
34
. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
E
NG
q
A
(See below.)
1. Disconnect connectors from TAC mod-
ule. Check terminals for damage or
loose connection. Then reconnect con-
nectors.
2. Carry out self-diagnosis again.
Do SLIP indicator and TCS OFF indi-
cator activate again?
Yes
E
No
Inspection end
I
Reconnect ECM connector.
I
Turn ignition switch ON.
I
Check voltage between terminal
110
for TAC module connector and ground.
Voltage: Approx. 12V
OK
E
NG
Repair harness and con-
nectors between terminal
110
for TAC module con-
nector and 7.5A fuse
34
.
Preliminary check (Basic inspection 3),
BR-48
q
A
Replace fuse.
Does the fuse blow out when ignition
switch is turned “START”?
No
E
Yes
Check the following.
I
Harness connector
F74
I
Harness for open or
short between TAC mod-
ule connector and fuse
If NG, repair harness or
connectors.
Inspection end
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-109
SBR680DA
Diagnostic Procedure 22 (NEUTRAL POSI SW:
Park/Neutral position (PNP) switch circuit)
Code No. 33 of TAC module
SBR516CA
SBR183DA
PNP SWITCH POWER SUPPLY CHECK
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check 10A fuse
18
. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
E
NG
q
A
(Go to next page.)
1. Disconnect connectors from TAC mod-
ule. Check terminals for damage or
loose connection. Then reconnect con-
nectors.
2. Carry out self-diagnosis again.
Do SLIP indicator and TCS OFF indi-
cator activate again?
Yes
E
No
Inspection end
Does TAC module display code No. 33
still when shifting selector lever to all posi-
tions with ignition switch ON?
Yes
E
No
Inspection end
I
Disconnect 20-pin connector from TAC
module.
I
Turn ignition switch ON.
I
Check continuity between terminal
q
6
and ground when shifting selector lever
to all positions.
Continuity should exist when shifting
to “P” and “N”.
Continuity should not exist when
shifting to other than “P” and “N”.
NG
E
OK
Inspection end
I
Turn ignition switch OFF.
I
Remove park/neutral position relay.
I
Check continuity between terminal
q
6
for TAC module connector and terminal
q
6
for park/neutral position relay con-
nector.
Continuity should exist.
OK
E
NG
Repair harness and con-
nectors.
Inspection end
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
H
H
H
H
H
BR-110
SBR518CA
SBR184DA
SBR185DA
q
A
Check continuity between terminal
q
6
for
TAC module connector and ground.
Continuity should not exist.
OK
E
NG
Repair harness and con-
nectors.
Check continuity between terminal
q
7
for
park/neutral position relay connector and
ground.
Continuity should exist.
OK
E
NG
Repair harness and con-
nectors.
CHECK PARK/NEUTRAL POSITION
RELAY.
Refer to PARK/NEUTRAL POSITION
RELAY in Electrical Component
Inspection, BR-126.
OK
E
NG
Replace park/neutral posi-
tion relay.
I
Turn ignition switch ON.
I
Check voltage between terminal
q
1
for
park/neutral position relay connector
and ground when shifting selector lever
to “P” & “N”.
Battery voltage should exist.
NG
E
OK
Repair harness and con-
nectors between terminal
q
2
for park/neutral position
relay connector and
ground.
CHECK PNP SWITCH.
Refer to PNP SWITCH in Electrical Com-
ponent Inspection, BR-127.
OK
E
NG
Replace PNP switch.
Check continuity between terminals
q
7
and
q
9
for PNP switch connector and ter-
minal
q
1
for park/neutral position relay
connector.
Continuity should exist.
OK
E
NG
Repair harness and con-
nectors.
Repair harness and connectors between
terminal
q
3
for PNP switch connector and
fuse block.
or
Check 10A fuse
18
. For fuse layout, refer
to foldout page of Circuit Diagram.
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
Diagnostic Procedure 22 (NEUTRAL POSI SW:
Park/Neutral position (PNP) switch circuit)
(Cont’d)
H
H
H
H
H
H
H
BR-111
SBR648E
Diagnostic Procedure 23 (SLIP indicator does
not come on when ignition switch is turned
on.)
SBR390E
SBR649E
CONTROL UNIT POWER SUPPLY
CIRCUIT
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check 7.5A fuse
4
for control unit.
For fuse layout, refer to POWER SUPPLY
ROUTING in EL section.
OK
E
NG
Replace fuse.
Replace bulb.
G
NG
1. Disconnect connector from ABS/TCS
control unit.
2. Check voltage between ABS/TCS con-
trol unit connector terminal
q
10
and
ground after turning ignition switch
“ON”.
Battery voltage should exist.
OK
E
NG
Check warning lamp bulb.
OK
Check the following.
I
Harness connector
B103
I
Harness for open or
short between ABS/TCS
control unit and fuse
If NG, repair harness or
connectors.
CIRCUIT CHECK
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect ABS/TCS control unit con-
nector.
2. Check continuity between ABS/TCS
control unit connector terminal
q
31
and
terminal
q
9
of data link connector.
Continuity should exist.
OK
E
NG
Check the following.
I
Harness connectors
B103
,
M5
I
Harness for open or short
between data link con-
nector terminal and ABS/
TCS control unit
If NG, repair harness or
connectors.
1. Disconnect connectors from ABS/TCS
control unit. Check terminals for dam-
age or loose connection. Then recon-
nect connectors.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Yes
E
No
Inspection end
Check items the self-diagnosis detected
as faulty.
TROUBLE DIAGNOSES FOR SYMPTOMS
H
H
H
H
H
BR-112
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