Infiniti M45 (Y34). Manual — part 86
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
AT-229
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3.
CHECK TERMINAL CORD ASSEMBLY
1.
Remove oil pan. Refer to
AT-312, "Control Valve Assembly"
2.
Disconnect A/T unit assembly harness connector and control valve assembly harness connector.
3.
Check continuity between A/T unit assembly harness connector
and control valve assembly harness connector.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> Replace the control valve assembly. Refer to
.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-226, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
5.
CHECK TCM
1.
Check TCM input/output signal. Refer to
AT-86, "TCM Input/Output Signal Reference Values"
2.
If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace damaged parts.
Item
Connector No.
Terminal No. (Wire color)
Continuity
A/T unit assembly
harness connector
F26
2 (R)
Yes
Control valve assem-
bly harness connector
F302
10 (R)
A/T unit assembly
harness connector
F26
5 (L)
Yes
Control valve assem-
bly harness connector
F302
13 (L)
A/T unit assembly
harness connector
F27
2 (B/R)
Yes
Control valve assem-
bly harness connector
F301
4 (B/R)
SCIA3096E
AT-230
DTC P1815 MANUAL MODE SWITCH
DTC P1815 MANUAL MODE SWITCH
PFP:34901
Description
ACS004AJ
Manual mode switch is installed in A/T device. It sends manual mode switch, shift up and shift down switch
signals to TCM.
TCM sends the switch signals to unified meter and A/C amp by CAN communication line. Then manual mode
switch position is indicated on the A/T position indicator. For inspection, refer to
CONSULT-II Reference Value in Data Monitor Mode
ACS004AK
On Board Diagnosis Logic
ACS004AL
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This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “MANU MODE SW/CIR” with CONSULT-II is detected when TCM monitors Man-
ual mode, Non manual mode, Up or Down switch signal, and detects as irregular when impossible input
pattern occurs 1 second or more.
Possible Cause
ACS004AM
●
Harness or connectors
(These switches circuit is open or shorted.)
●
Mode select switch (Into control device)
●
Position select switch (Into control device)
DTC Confirmation Procedure
ACS004AN
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.
Turn ignition switch ON. (Do not start engine.)
2.
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3.
Start engine.
4.
Move selector lever to “M” position for at least 2 consecutive
seconds.
5.
If DTC is detected, go to
AT-232, "Diagnostic Procedure"
Item name
Condition
Display value
MANU MODE SW
Manual shift gate position (neutral)
ON
Other than the above
OFF
NON M-MODE SW
Manual shift gate position
OFF
Other than the above
ON
UP SW LEVER
Select lever: + side
ON
Other than the above
OFF
DOWN SW LEVER
Select lever: - side
ON
Other than the above
OFF
SAT014K
DTC P1815 MANUAL MODE SWITCH
AT-231
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Wiring Diagram — AT — MMSW
ACS004AO
TCWA0242E
AT-232
DTC P1815 MANUAL MODE SWITCH
Diagnostic Procedure
ACS004AP
1.
CHECK MANUAL MODE 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 “MANU MODE SW”,
“NON M-MODE SW”, “UP SW LEVER”, “DOWN SW LEVER”.
Without CONSULT-II
●
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
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING ITEM
Check the following items.
●
.
●
Manual mode switch. Refer to
AT-233, "Component Inspection"
●
Pin terminals for damage or loose connection with harness connector.
●
Open circuit or short to ground or short to power in harness or connector for A/T device (manual mode
switch).
OK or NG
OK
>> GO TO 3
NG
>> Repair or replace damaged parts.
3.
CHECK DTC
Perform DTC confirmation procedure. Refer to
AT-230, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> Replace the control device assembly.
Item name
Condition
Display value
MANU MODE SW
Manual shift gate posi-
tion (neutral)
ON
Other than the above
OFF
NON M-MODE SW
Manual shift gate position
OFF
Other than the above
ON
UP SW LEVER
Select lever: + side
ON
Other than the above
OFF
DOWN SW LEVER
Select lever: - side
ON
Other than the above
OFF
PCIA0064E
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