Infiniti F50. Manual — part 82
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
AT-213
D
E
F
G
H
I
J
K
L
M
A
B
AT
Diagnostic Procedure
ECS00887
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 the manual mode (“M1-1st” or “M2-2nd”
gear), and confirm the ON/OFF actuation of the “ATF PRES SW
2”.
With GST
Follow the procedure “With CONSULT-II”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TCM AND A/T UNIT ASSEMBLY HARNESS CONNECTOR
1.
Turn ignition switch to “OFF” position.
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.
PCIA0067E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F103
13 (W/L)
Yes
A/T unit assembly harness
connector
F27
2 (W/L)
TCM
F103
16 (W/G)
Yes
A/T unit assembly harness
connector
F26
5 (W/G)
TCM
F104
40 (Y/G)
Yes
A/T unit assembly harness
connector
F26
2 (Y/G)
SCIA3095E
AT-214
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
3.
CHECK TERMINAL CORD ASSEMBLY
1.
Remove oil pan. Refer to
AT-289, "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
AT-289, "Control Valve Assembly"
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-211, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
5.
PERFORM TCM INSPECTION
1.
Perform TCM input/output signal inspection.
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 connec-
tor
F302
10 (R)
A/T unit assembly
harness connector
F26
5 (L)
Yes
Control valve assem-
bly harness connec-
tor
F302
13 (L)
A/T unit assembly
harness connector
F27
2 (B/R)
Yes
Control valve assem-
bly harness connec-
tor
F301
4 (B/R)
SCIA3096E
DTC P1815 MANUAL MODE SWITCH
AT-215
D
E
F
G
H
I
J
K
L
M
A
B
AT
DTC P1815 MANUAL MODE SWITCH
PFP:34901
Description
ECS00888
When an impossible pattern of switch signals is detected, this is judged to be an irregularity.
CONSULT-II Reference Value in Data Monitor Mode
ECS00889
On Board Diagnosis Logic
ECS0088A
●
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
ECS0088B
●
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
ECS0088C
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 to “ON” position. (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.
AT-217, "Diagnostic Procedure"
Monitor Item
Condition
Reference Value
MANU MODE SW
[ON - OFF]
Manual shift gate position (neutral)
ON
Other than the above
OFF
NON M-MODE SW
[ON - OFF]
Manual shift gate position
OFF
Other than the above
ON
UP SW LEVER
[ON - OFF]
Select lever: + side
ON
Other than the above
OFF
DOWN SW LEVER
[ON - OFF]
Select lever: - side
ON
Other than the above
OFF
SAT014K
AT-216
DTC P1815 MANUAL MODE SWITCH
Wiring Diagram — AT — MMSW
ECS0088D
TCWM0102E
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