Infiniti M45 (Y34). Manual — part 91
DTC P1846 ATF PRESSURE SWITCH 6
AT-249
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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.
OK or NG
OK
>> GO TO 4.
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-246, "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
>> Replace the control valve assembly. Refer to
AT-312, "Control Valve Assembly"
.
NG
>> Repair or replace damaged parts.
Item
Connector No.
Terminal No. (Wire color)
Continuity
A/T unit assembly
harness connector
F26
4 (Y)
Yes
Control valve assem-
bly harness connector
F302
11 (Y)
SCIA3104E
AT-250
PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-
TION SWITCH CIRCUIT
PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-
TION SWITCH CIRCUIT
PFP:31918
CONSULT-II Reference Value
ACS0064O
Item name
Condition
Display value
PNP SW 1
When setting selector lever to “P” position.
OFF
When setting selector lever to “N” position.
ON
PNP SW 2
When setting selector lever to “P” position.
OFF
When setting selector lever to “D” position.
ON
PNP SW 3
When setting selector lever to “D” position.
OFF
When setting selector lever to “R” position.
ON
PNP SW 4
When setting selector lever to “P” position.
OFF
When setting selector lever to “R” position.
ON
SLCT LVR POSI
When setting selector lever to “N” or “P” posi-
tion.
N · P
When setting selector lever to “R” position.
R
When setting selector lever to “D” position.
D
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
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
CLSO THL POS
Released accelerator pedal.
ON
Fully depressed accelerator pedal.
OFF
W/O THL POS
Fully depressed accelerator pedal.
ON
Released accelerator pedal.
OFF
PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-
TION SWITCH CIRCUIT
AT-251
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Diagnostic Procedure
ACS001FO
1.
CHECK PNP SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch ON. (Do not start engine.)
2.
Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
3.
Read out “N·P”, “R” and “D” position switches moving selector
lever to each position.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING ITEM
Check the following items.
●
Disconnection or short-circuit in the harness between TCM and PNP switch 1, 2, 3, 4.
●
Disconnection or short-circuit in the harness between the PNP switch 3 monitor and TCM.
●
AT-110, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
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”.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
Item name
Condition
Display value (Approx.)
SLCT LVR POSI
When setting selector
lever to “N” or “P” posi-
tion.
N · P
When setting selector
lever to “R” position.
R
When setting selector
lever to “D” position.
D
PCIA0034E
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
AT-252
PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-
TION SWITCH CIRCUIT
4.
DETECT MALFUNCTIONING ITEM
Check the following items.
●
Manual mode switch. Refer to
AT-230, "DTC P1815 MANUAL MODE SWITCH"
●
Check the connector housing for missing, loosening, bending or falling down of any terminal.
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts.
5.
CHECK BRAKE 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
>> GO TO 6.
NG
>> Check the following items.
●
Stop lamp switch. Refer to
.
●
Combination meter. Refer to
.
6.
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”.
4.
Perform the self-diagnosis for “ENGINE” with CONSULT-II.
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace damaged parts.
7.
CHECK DTC
Perform SELF-DIAGNOSTIC PROCEDURE.
●
Refer to
●
CAN Communication Line. Refer to
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 8.
Item name
Condition
Display value
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
PCIA0070E
Accelerator Pedal Operation
Monitor Item
CLSD THL POS
W/O THL POS
Released
ON
OFF
Fully depressed
OFF
ON
PCIA0070E
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