Infiniti M45 (Y34). Manual — part 87
DTC P1815 MANUAL MODE SWITCH
AT-233
D
E
F
G
H
I
J
K
L
M
A
B
AT
Component Inspection
ACS004AQ
MANUAL MODE SWITCH
Check continuity between terminals.
A/T Position Indicator
ACS004AR
DIAGNOSTIC PROCEDURE
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 select lever is shifted to the “+ (up)” or “-
(down)” side (1st
⇔
5th gear).
OK or NG
OK
>> INSPECTION END
NG
>> Check the following items.
A/T Position Indicator Symptom Chart
Item
Position
Connector
No.
Terminal No.
(Unit side)
Continuity
Manual mode
select switch
Auto
M97
4 - 5
Yes
Manual
1 - 4
Manual mode
position select
switch
Up
3 - 4
Down
2 - 4
SCIA4626E
PCIA0065E
Items
Presumed location of trouble
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 position indicator is not indicated.
Manual mode switch
●
AT-230, "DTC P1815 MANUAL MODE SWITCH"
A/T main system (Fail-safe function actuated)
●
AT-92, "SELF-DIAGNOSTIC RESULT MODE"
The actual gear position changes, but the A/T position indicator is
not indicated.
Execute the self-diagnosis function.
●
AT-92, "SELF-DIAGNOSTIC RESULT MODE"
The actual gear position and the indication on the A/T position
indicator do not coincide.
Execute the self-diagnosis function.
●
AT-92, "SELF-DIAGNOSTIC RESULT MODE"
Only a specific position or positions is/are not indicated on the A/T
position indicator.
Check the combination meter.
●
AT-234
DTC P1841 ATF PRESSURE SWITCH 1
DTC P1841 ATF PRESSURE SWITCH 1
PFP:25240
Description
ACS004AS
Fail-safe function to detect front brake clutch solenoid valve condition.
CONSULT-II Reference Value
ACS004PR
On Board Diagnosis Logic
ACS004AT
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “ATF PRES SW 1/CIRC” with CONSULT-II is detected, when TCM detects that
actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 1 is
irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
ACS004AU
●
ATF pressure switch 1
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
ACS004AV
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following condition.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd
Þ
4th Gear (FR/B ON/OFF)
3.
Perform step “2” again.
4.
Turn ignition switch OFF, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1841) is detected, go to
.
If DTC (P1757) is detected, go to
AT-191, "Diagnostic Procedure"
Item name
Condition
Display value
ATF PRES SW 1
Front brake solenoid valve operates.
ON
Other conditions
OFF
SAT014K
DTC P1841 ATF PRESSURE SWITCH 1
AT-235
D
E
F
G
H
I
J
K
L
M
A
B
AT
Wiring Diagram — AT — FPSW1
ACS004AW
TCWA0136E
AT-236
DTC P1841 ATF PRESSURE SWITCH 1
TCM terminal and data are reference value. Measured between each terminal and ground.
Diagnostic Procedure
ACS004AX
1.
CHECK INPUT SIGNALS
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Accelerate vehicle in “D” position (3rd
Þ
4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 1”.
Without CONSULT-II
1.
Start engine.
2.
Accelerate vehicle in “D” position (3rd
Þ
4th gear).
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK POWER SOURCE CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect TCM connector.
3.
Check continuity between A/T unit assembly harness connector
and TCM connector.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
35
B/Y
PSB2 (ATF pres-
sure switch 1)
When
vehicle
starts
When front brake solenoid valve OFF.
Battery voltage
When front brake solenoid valve ON.
0V
Item name
Condition
Display value
ATF PRES SW 1
Front brake solenoid
valve operates.
ON
Other conditions
OFF
PCIA0067E
Solenoid valve
Connector
No.
Terminal No.
(Wire color)
Voltage
Front brake solenoid
valve
OFF
F104
35 (B/Y) - Ground
Battery voltage
ON
Approx. 0 V
PCIA0066E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F104
35 (B/Y)
Yes
A/T unit assembly harness
connector
F26
3 (B/Y)
SCIA3097E
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