Infiniti F50. Instruction - page 75
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION
AT-185
D
E
F
G
H
I
J
K
L
M
A
B
AT
Wiring Diagram — AT — FR/BF
ECS00876
TCM terminal and data are reference value. Measured between each terminal and ground.
TCWM0094E
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
19
R
Front brake
solenoid valve
When
vehicle
cruises
When the solenoid valve is operating (other than 4th gear)
More than 2V
When the solenoid valve is not operating (4th gear)
0V
35
B/Y
PSB2 (pres-
sure switch 1)
When front brake solenoid valve “OFF”.
Battery voltage
When front brake solenoid valve“ ON”.
0V
AT-186
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION
Diagnostic Procedure
ECS00877
1.
INPUT SIGNALS (WITH CONSULT-II)
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 “D” position (3rd
Þ
4th gear), and con-
firm the ON/OFF actuation of the “ATF PRES SW 1”.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 3.
2.
INPUT SIGNALS (WITHOUT CONSULT-II)
Without CONSULT-II
1.
Start engine.
2.
Accelerate vehicle in the “D” position (3rd
Þ
4th gear).
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 3.
3.
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 4.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
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
F103
19 (R)
Yes
A/T unit assembly harness
connector
F27
5 (R)
TCM
F104
35 (B/Y)
Yes
A/T unit assembly harness
connector
F26
3 (B/Y)
SCIA3080E
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION
AT-187
D
E
F
G
H
I
J
K
L
M
A
B
AT
4.
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.
5.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-184, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
6.
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
3 (G)
Yes
Control valve assem-
bly harness connec-
tor
F302
12 (G)
A/T unit assembly
harness connector
F27
5 (W/R)
Yes
Control valve assem-
bly harness connec-
tor
F301
8 (W/R)
SCIA3081E
AT-188
DTC P1762 DIRECT CLUTCH SOLENOID VALVE
DTC P1762 DIRECT CLUTCH SOLENOID VALVE
PFP:31940
Description
ECS00878
Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehicle
speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
On Board Diagnosis Logic
ECS00879
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “D/C SOLENOID/CIRC” with CONSULT-II or P1762 without CONSULT-II is
detected under the following conditions.
–
When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–
When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
ECS0087A
●
Harness or connectors
(The solenoid circuit is open or shorted.)
●
Direct clutch solenoid valve
DTC Confirmation Procedure
ECS0087B
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.
Maintain the following conditions for at least 5 consecutive sec-
onds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 1st
Þ
2nd Gear (D/C ON/OFF)
5.
If DTC is detected, go to
AT-190, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “With CONSULT-II”.
SAT014K