Infiniti Q45. Manual — part 66
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
AT-177
D
E
F
G
H
I
J
K
L
M
A
B
AT
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
PFP:18002
CONSULT-II Reference Value
NCS00106
Diagnostic Procedure
NCS00107
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK THROTTLE POSITION SIGNAL CIRCUIT
With CONSULT-II
1.
Turn ignition switch ON. (Do not start engine.)
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Depress accelerator pedal and read out the value of “CLSD THL
POS” and “W/O THL POS”.
OK or NG
OK
>> INSPECTION END
NG
>> Check the following. If NG, repair or replace damaged parts.
●
Perform the self-diagnosis for “ENGINE” with CONSULT-II. Refer to
.
●
Open circuit or short to ground or short to power in harness or connectors.
●
Pin terminals for damage or loose connection with harness connector.
Item name
Condition
Display value
CLSD THL POS
Released accelerator pedal.
ON
Fully depressed accelerator pedal.
OFF
W/O THL POS
Fully depressed accelerator pedal.
ON
Released accelerator pedal.
OFF
Accelerator Pedal Operation
Monitor Item
CLSD THL POS
W/O THL POS
Released
ON
OFF
Fully depressed
OFF
ON
PCIA0070E
AT-178
BRAKE SIGNAL CIRCUIT
BRAKE SIGNAL CIRCUIT
PFP:25320
CONSULT-II Reference Value
NCS00108
Diagnostic Procedure
NCS00109
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch ON. (Do not start engine.)
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Read out ON/OFF switching action of the “BRAKE SW”.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch harness connector termi-
nals. Refer to
AT-180, "Wiring Diagram — AT — NONDTC"
Check stop lamp switch after adjusting brake pedal — refer to
.
OK or NG
OK
>> Check the following. If NG, repair or replace damaged
parts.
●
Harness for short or open between battery and stop lamp switch.
●
Harness for short or open between stop lamp switch and combination meters.
●
10 A fuse (No.17, located in fuse block No.1)
NG
>> Repair or replace the stop lamp switch.
Item name
Condition
Display value
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
Item name
Condition
Display value
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
PCIA0070E
Condition
Continuity
When brake pedal is depressed
Yes
When brake pedal is released
No
SCIA2126E
A/T INDICATOR CIRCUIT
AT-179
D
E
F
G
H
I
J
K
L
M
A
B
AT
A/T INDICATOR CIRCUIT
PFP:24810
Description
NCS0010A
The TCM sends the switch signals to combination meters. By CAN communication line. Then manual mode
switch position is indicated on the A/T indicator.
CONSULT-II Reference Value
NCS0010B
Diagnostic Procedure
NCS0010C
1.
CHECK INPUT SIGNALS
With CONSULT-II
1.
Start engine.
2.
Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II and read out the value of “GEAR”.
3.
Drive vehicle in the manual mode, and confirm that the actual
gear position and the meter's indication of the position mutually
coincide when the selector lever is shifted to the “+ (up)” or “-
(down)” side (1st
⇔
5th gear).
OK or NG
OK
>> INSPECTION END
NG
>> Check the following.
A/T INDICATOR SYMPTOM CHART
Item name
Condition
Display value
GEAR
During driving
1, 2, 3, 4, 5
PCIA0065E
Items
Possible location of malfunction
The actual gear position does not change, or shifting into the
manual mode is not possible (no gear shifting in the manual mode
possible).
The A/T indicator is not indicated.
Manual mode switch
Refer to
AT-161, "DTC P1815 MANUAL MODE SWITCH"
A/T main system (Fail-safe function actuated)
●
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
The actual gear position changes, but the A/T indicator is not indi-
cated.
Perform the self-diagnosis function.
●
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
The actual gear position and the indication on the A/T indicator do
not coincide.
Perform the self-diagnosis function.
●
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
Only a specific position or positions is/are not indicated on the A/T
indicator.
Check the combination meters.
Refer to
AT-180
TROUBLE DIAGNOSIS FOR SYMPTOMS
TROUBLE DIAGNOSIS FOR SYMPTOMS
PFP:00007
Wiring Diagram — AT — NONDTC
NCS0010D
TCWM0481E
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