Infiniti Q45 (FY33). Manual — part 82
Symptom Chart
PROCEDURE
SYMPTOM
Preliminary check
Diagnostic Procedures
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BASIC
INSPECTION
1
BASIC
INSPECTION
2
BASIC
INSPECTION
3
Diagnostic
Procedure
1
Diagnostic
Procedure
2
Diagnostic
Procedure
3
Diagnostic
Procedure
4
Diagnostic
Procedure
5
Diagnostic
Procedure
6
Diagnostic
Procedure
7
Diagnostic
Procedure
8
Diagnostic
Procedure
9
Diagnostic
Procedure
10
Diagnostic
Procedure
1
1
Diagnostic
Procedure
12
Long stopping distance
q
q
q
Poor acceleration
q
q
q
Abnormal indicator/warning lamp operation
q
q
q
TCS cannot be canceled by TCS OFF switch.
q
q
q
TAC module power and ground circuits
q
q
q
Warning activates, but self-diagnosis does not
work.
q
q
q
q
ABS works frequently.
q
q
q
Unexpected pedal action
q
q
q
ABS does not work.
Pedal vibration and noise
SELF-DIAGNOSTIC
RESUL
T
ABS/TCS
control
unit
Code No. 21, 22, 25, 26, 31, 32, 35, 36
q
q
q
q
Code No. 41, 42, 45, 46, 55, 56
q
q
q
q
Code No. 63
q
q
q
q
Code No. 61
q
q
q
q
Code No. 57
q
q
q
q
Code No. 71
q
q
q
q
No code indication (OFF)
q
q
q
No code indication (ON)
q
q
q
Code No. 80
q
q
q
q
Code No. 58
q
q
q
q
Code No. 83
q
q
q
q
Code No. 85
q
q
q
q
Code No. 75
q
q
q
q
Code No. 84
q
q
q
q
T
A
C
module
Code No. 11
q
q
q
Code No. 12
q
q
q
Code No. 13
q
q
q
Code No. 21
q
q
q
Code No. 22
q
q
q
Code No. 23, 24
q
q
q
Code No. 31
q
q
q
Code No. 32
q
q
q
Code No. 33
q
q
q
Code No. 34
q
q
q
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES
BR-45
PROCEDURE
SYMPTOM
Diagnostic Procedures
TROUBLE DIAGNOSES FOR SELF-DIAG-
NOSTIC ITEMS
TROUBLE DIAGNOSES FOR SYMPTOMS
Diagnostic
Procedure
13
Diagnostic
Procedure
14
Diagnostic
Procedure
15
Diagnostic
Procedure
16
Diagnostic
Procedure
17
Diagnostic
Procedure
18
Diagnostic
Procedure
19
Diagnostic
Procedure
20
Diagnostic
Procedure
21
Diagnostic
Procedure
22
Diagnostic
Procedure
23
Diagnostic
Procedure
24
Diagnostic
Procedure
25
Diagnostic
Procedure
26
Diagnostic
Procedure
27
Diagnostic
Procedure
28
Diagnostic
Procedure
29
Diagnostic
Procedure
30
Diagnostic
Procedure
31
Diagnostic
Procedure
32
Long stopping distance
q
Poor acceleration
Abnormal indicator/warning lamp operation
q q q q
TCS cannot be canceled by TCS OFF switch.
q
TAC module power and ground circuits
q
Warning activates, but self-diagnosis does not
work.
ABS works frequently.
q
Unexpected pedal action
q
ABS does not work.
q
Pedal vibration and noise
q
SELF-DIAGNOSTIC
RESUL
T
ABS/TCS
control
unit
Code No. 21, 22, 25, 26, 31, 32, 35, 36
Code No. 41, 42, 45, 46, 55, 56
Code No. 63
Code No. 61
Code No. 57
Code No. 71
No code indication (OFF)
q
No code indication (ON)
Code No. 80
Code No. 58
q
Code No. 83
Code No. 85
Code No. 75
Code No. 84
T
A
C
module
Code No. 11
q
Code No. 12
q
Code No. 13
q
Code No. 21
q
Code No. 22
q
Code No. 23, 24
q
Code No. 31
q
Code No. 32
q
Code No. 33
q
Code No. 34
q
TROUBLE DIAGNOSES
Symptom Chart (Cont’d)
BR-46
PROCEDURE
SYMPTOM
Electrical Component Inspection
TCS
OFF
SWITCH
THROTTLE
MOT
OR
RELA
Y
P
ARK/NEUTRAL
POSITION
RELA
Y
PNP
SWITCH
THROTTLE
MOT
OR
Long stopping distance
Poor acceleration
Abnormal indicator/warning lamp operation
q
TCS cannot be canceled by TCS OFF switch.
q
TAC module power and ground circuits
Warning activates, but self-diagnosis does not
work.
ABS works frequently.
Unexpected pedal action
ABS does not work.
Pedal vibration and noise
SELF-DIAGNOSTIC
RESUL
T
ABS/TCS
control
unit
Code No. 21, 22, 25, 26, 31, 32, 35, 36
Code No. 41, 42, 45, 46, 55, 56
Code No. 63
Code No. 61
q
Code No. 57
Code No. 71
No code indication (OFF)
No code indication (ON)
Code No. 80
Code No. 58
Code No. 83
Code No. 85
Code No. 75
Code No. 84
T
A
C
module
Code No. 11
Code No. 12
Code No. 13
Code No. 21
Code No. 22
Code No. 23, 24
q
Code No. 31
Code No. 32
Code No. 33
q
q
Code No. 34
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES
Symptom Chart (Cont’d)
BR-47
Preliminary Check (Check brake fluid level in
reservoir tank and brake line for leakage.)
BASIC INSPECTION 1: BRAKE FLUID LEVEL AND LEAKAGE
1. Check brake fluid level in reservoir tank. Replenish brake fluid if necessary.
2. Check for leakage at or around brake piping and ABS actuators. If leakage or seepage is noted, proceed
as follows:
I
If ABS actuator connectors are loose, tighten to specified torque. Recheck to ensure that leakage is no
longer present.
I
If flare nut threads at piping connectors or actuator threads are damaged, replace faulty parts with new
ones. Recheck to ensure that leakage is no longer present.
I
If brake fluid leaks through areas other than actuator connectors, wipe off using a clean cloth. Recheck
for leakage or seepage. If necessary, replace faulty parts with new ones.
I
If brake fluid leaks at or seeps through actuators, wipe off using a clean cloth. Recheck for leakage or
seepage. If necessary, replace with new actuators.
CAUTION:
ABS actuators cannot be disassembled.
3. Check brake booster for proper operation.
4. Check brake disc rotor and pad condition.
BASIC INSPECTION 2: LOOSE POWER LINE TERMINAL AND POWER VOLTAGE
Check battery terminals (positive and negative) and battery mounting (ground) for looseness. If necessary,
tighten to specified torque. Also check for low battery voltage.
BASIC INSPECTION 3: SLIP, TCS OFF INDICATOR AND ABS WARNING LAMP
1. Turn ignition switch “ON” to ensure that TCS OFF indicator lights. If TCS OFF indicator does not light,
check TCS OFF circuit.
(Refer to diagnostic procedure 24 “TCS OFF indicator does not come on when ignition switch is turned
on” under “TROUBLE DIAGNOSES FOR SYMPTOMS”.)
2. Turn ignition switch “ON” to ensure that SLIP indicator lights. If SLIP indicator does not light, check SLIP
indicator circuit.
(Refer to diagnostic procedure 23 “SLIP indicator does not come on when ignition switch is turned on”
under “TROUBLE DIAGNOSES FOR SYMPTOM”.)
3. Turn ignition switch “ON” to ensure that ABS warning lamp lights. If ABS warning lamp does not light, check
ABS warning lamp circuit.
(Refer to diagnostic procedure 25 “ABS warning lamp does not come on when ignition switch is turned
on” under “TROUBLE DIAGNOSES FOR SYMPTOM”.)
4. Check to ensure that SLIP indicator and ABS warning lamp go out approximately 1 second after engine
starts. If SLIP indicator and ABS warning lamp do not go out, perform self-diagnostic procedures.
(Refer to BR-59, BR-63.)
5. After driving vehicle at 30 km/h (19 MPH) for more than 1 minute, check to ensure that SLIP indicator and
ABS warning lamp remain off. If SLIP indicator and ABS warning lamp light, perform self-diagnostic pro-
cedures.
(Refer to BR-59, BR-63.)
6. While running engine, turn TCS OFF switch “ON” and “OFF” to ensure that TCS OFF indicator lights and
goes out correspondingly. If TCS OFF indicator does not correspond with switch operation, check TCS
OFF switch circuit.
(Refer to Diagnostic Procedure 27 “INOPERATIVE TCS OFF SWITCH” under “TROUBLE DIAGNOSES
FOR SYMPTOM”.)
7. Start engine (TCS OFF switch “OFF”) to ensure that TCS OFF indicator goes out. If TCS OFF indicator
remains on for more than 10 seconds after engine starts, perform self-diagnostic procedures.
(Refer to BR-59, BR-63.)
8. Drive vehicle at 30 km/h (19 MPH) for more than 1 minute to ensure that TCS OFF indicator remains off.
If TCS OFF indicator lights, perform self-diagnostic procedures.
(Refer to BR-59, BR-63.)
9. After performing self-diagnostic procedures, be sure to erase trouble stored in memory.
TROUBLE DIAGNOSES
BR-48
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