Infiniti F50. Manual — part 78
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
AT-197
D
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G
H
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A
B
AT
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
PFP:31940
Description
ECS0087K
High & low reverse 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
ECS0087L
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “HLR/C SOL/CIRC” with CONSULT-II or P1767 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
ECS0087M
●
Harness or connectors
(The solenoid circuit is open or shorted.)
●
High & low reverse clutch solenoid valve
DTC Confirmation Procedure
ECS0087N
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.
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: 2nd
Þ
3rd Gear (HLR/C ON/OFF)
5.
AT-199, "Diagnostic Procedure"
WITH GST
Follow the procedure “With CONSULT-II”.
SAT014K
AT-198
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
Wiring Diagram — AT — HLR/C
ECS0087O
TCM terminal and data are reference value. Measured between each terminal and ground.
TCWM0023E
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
11
R/L
High & low
reverse clutch
solenoid valve
When
vehicle
cruises
When the solenoid valve operating [6 km/h (4 MPH) or
faster in 1st gear or 2nd gear]
More than 2V
When the solenoid valve is not operating [6 km/h (4 MPH)
or slower in 1st gear or 3rd, 4th, or 5th gear]
0V
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
AT-199
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Diagnostic Procedure
ECS0087P
1.
CHECK HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE CIRCUIT
1.
Turn ignition switch to “OFF” position.
2.
Disconnect A/T unit assembly harness connector at the trans-
mission right side.
3.
Check the resistance between terminal and ground.
OK or NG
OK >> GO
TO
4.
NG
>> GO TO 2.
2.
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.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK VALVE RESISTANCE
Check valve resistance
●
Refer to
AT-201, "Component Inspection"
OK or NG
OK >> GO
TO
4.
NG
>> Replace the control valve assembly. Refer to
AT-289, "Control Valve Assembly"
.
Solenoid valve
Connector
No.
Terminal No.
(Wire color)
Resistance (Approx.)
High and low reverse
clutch solenoid valve
F27
3 (R/L) - Ground
3 - 9
Ω
SCIA1843E
Item
Connector No.
Terminal No. (Wire color)
Continuity
A/T unit assembly
harness connector
F27
3 (B/W)
Yes
Control valve assem-
bly harness connec-
tor
F301
5 (B/W)
SCIA3087E
AT-200
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
4.
CHECK POWER SOURCE CIRCUIT
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 5.
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-197, "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
TCM
F103
11 (R/L)
Yes
A/T unit assembly harness
connector
F27
3 (R/L)
SCIA1844E
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