Infiniti Q45 (FY33). Manual — part 88
ACTIVE TEST MODE
TEST ITEM
CONDITION
JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
FRONT SOLENOID
REAR SOLENOID
Engine is running.
Brake fluid pressure control operation
IN SOL
OUT SOL
UP (Increase):
KEEP (Hold):
DOWN (Decrease):
OFF
ON
ON
OFF
OFF
ON
ABS MOTOR
ABS actuator motor
ON: Motor runs
OFF: Motor stops
Note: Active test will automatically stop ten seconds after the test starts. (EMERGENCY STOP moni-
tor shows ON.)
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES
CONSULT-II Inspection Procedure for ABS/TCS
Control Unit (Cont’d)
BR-69
SBR633D
Self-diagnosis for TAC Module
SELF-DIAGNOSIS PROCEDURE
Turn ignition switch “ON” or start engine.
(Self-diagnosis will then start.)
TAC module LED lights indicating trouble
code.
Determine trouble areas using trouble
code table. Repair affected area.
After repairs, erase trouble code stored in
TAC module memory. (See Note.)
Turn ignition switch “OFF” and then “ON”
or start engine to ensure that trouble code
is erased from TAC module memory.
Check to ensure that SLIP and TCS OFF
indicators remain off.
NOTE: Use memory erasure
procedures outlined
on next page.
HOW TO READ SELF-DIAGNOSTIC RESULTS (Malfunction codes)
I
Count the number of TAC module LED flashes (ten digits and unit digits). If multiple troubles occur, their
corresponding trouble code numbers will be stored in the memory. For indication pattern, start code num-
ber 12 will be indicated first. Following start code number 12, trouble code numbers will be indicated in
numerical order, one at a time, and will be repeated.
I
If there is no trouble, only trouble code 55 will be repeatedly indicated.
I
The malfunction code chart is given on the next page.
SBR337CA
TROUBLE DIAGNOSES
H
H
H
H
H
BR-70
HOW TO ERASE SELF-DIAGNOSTIC RESULTS (Malfunction codes)
I
With accelerator pedal fully depressed (full-open throttle), turn neutral position switch “OFF” and place shift
lever in any position other than “P” or “N”.
I
After turning ignition switch “ON” (engine off), turn neutral position switch “ON” and place shift lever in “P”
or “N”. Release accelerator pedal (full-closed throttle).
I
Items indicated in the following table can be erased as per conditions without using erasure procedures
outlined above. These items are erased under conditions outlined in the table.
Trouble code No.
Malfunctioning area
Conditions
13
TCS control unit-to-TAC module communication cir-
cuit (secondary throttle valve operating signal circuit)
Correct communication synchronization is met.
31
Start signal circuit
Either “OFF
,
ON” or “ON
,
OFF” switching of
start signal is sensed after ignition switch has been
turned “ON”.
33
Park/Neutral position switch circuit
Either “ON
,
OFF” or “OFF
,
ON” switching of
park/neutral position switch is sensed after ignition
switch has been turned “ON”.
After the erase operation is completed, it is necessary to rerun the self-diagnostic mode to verify that
malfunction codes no longer appear. Only the Code No. 55 should be indicated when erase operation
is completed and system is functioning normally.
MALFUNCTION CODE/SYMPTOM CHART
Code No.
(No. of LED flashes)
Malfunctioning part
Indicator
Fail-safe
Diagnostic
procedure
SLIP
TCS OFF
11
Throttle position sensor circuit
ON
ON
X
14
12
Secondary throttle position sensor circuit
ON
ON
X
15
13
Secondary throttle valve operating signal circuit
ON
ON
X
16
21
Throttle motor circuit (Operation and open cir-
cuit check)
ON
ON
X
17
22
Throttle motor circuit (Short circuit check)
ON
ON
X
17
23
Throttle motor relay circuit (Short)
ON
ON
X
18
24
Throttle motor relay circuit (Open)
ON
ON
X
18
31 (See Note.)
Engine start signal circuit
OFF
OFF
—
21
32
Secondary throttle valve return spring broken
ON
ON
X
20
33 (See Note.)
Park/Neutral position switch circuit
OFF
OFF
—
22
34
Power supply circuit (for sensor)
ON
ON
X
19
55
No malfunction in the above circuits
OFF
OFF
—
—
NOTE: Even if start signal and park/neutral position switch circuits become inoperative, TCS control will function properly.
Only LEDs flash indicating a malfunctioning area.
SBR711D
If the system becomes inoperative, the TCS function will be sus-
pended. The fail-safe system will then activate, illuminating the
SLIP indicator and TCS OFF indicator. The motor throttle valve will
act as one similar to a vehicle which is not equipped with a TCS.
CAUTION:
I
If the motor throttle control system becomes inoperative,
only the TCS function will be suspended. The ABS func-
tion will activate properly.
I
If the TCM fail-safe system activates, the self-diagnostic
procedure must be performed first on the ABS/TCS con-
trol system.
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES
Self-diagnosis for TAC Module (Cont’d)
BR-71
TCM fail-safe
Self-diagnosis item
Fail-safe condition
Code No.
Malfunction
Type
q
A
Type
q
B
11
Throttle position sensor circuit
X
—
12
Secondary throttle position sensor circuit
X
—
13
Secondary throttle valve operating signal circuit
X
—
21
Throttle motor circuit (Operation and open circuit check)
X
—
22
Throttle motor circuit (Short circuit check)
X
—
23
Throttle motor relay circuit (Short)
X
—
24
Throttle motor relay circuit (Open)
X
—
31
Engine start signal circuit (Short)
—
X
32
Secondary throttle valve return spring broken
—
X
33
Park/Neutral position switch circuit
—
X
34
Power supply circuit (for sensor)
X
—
55
No malfunction in the above circuits
—
—
X: Available
—: Not available
Type
q
A
: Areas whereby throttle operation is uncontrollable.
Type
q
B
: Areas whereby throttle operation is controllable.
CONSULT-II for TAC Module
CONSULT-II APPLICATION TO ABS
ITEM
SELF-DIAGNOSTIC
RESULTS
DATA MONITOR
ACTIVE TEST
Throttle position sensor
X
X
—
Secondary throttle position sensor
X
X
X
Closed throttle position switch
—
X
—
Park/Neutral position switch
X
X
—
Throttle motor
X
X
X
Throttle motor relay
X
X
X
X: Applicable
—: Not applicable
ECU (TAC module) part number mode
Ignore the ECU part number displayed in the ECU PART NUMBER MODE. Refer to parts catalog to order
the ECU.
TROUBLE DIAGNOSES
Self-diagnosis for TAC Module (Cont’d)
BR-72
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