Infiniti M45 (Y34). Manual — part 90
DTC P1845 ATF PRESSURE SWITCH 5
AT-245
D
E
F
G
H
I
J
K
L
M
A
B
AT
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
>> Replace the control valve assembly. Refer to
AT-312, "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-242, "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
2 (R)
Yes
Control valve assem-
bly harness connector
F302
10 (R)
A/T unit assembly
harness connector
F26
6 (GY)
Yes
Control valve assem-
bly harness connector
F302
14 (GY)
SCIA3102E
AT-246
DTC P1846 ATF PRESSURE SWITCH 6
DTC P1846 ATF PRESSURE SWITCH 6
PFP:25240
Description
ACS004BA
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference Value
ACS004PU
On Board Diagnosis Logic
ACS004BB
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “ATF PRES SW 6/CIRC” with CONSULT-II is detected, when TCM detects that
actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6 is
irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
ACS004BC
●
ATF pressure switch 6
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
ACS004BD
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.
Start engine.
2.
Accelerate vehicle to maintain the following condition.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd
Þ
3rd Gear (HLR/C ON/OFF)
3.
Perform step “2” again.
4.
Turn ignition switch OFF, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to
.
If DTC (P1767) is detected, go to
AT-211, "Diagnostic Procedure"
Item name
Condition
Display value
ATF PRES SW 6
High and low reverse clutch solenoid valve
operates.
OFF
Other conditions
ON
SAT014K
DTC P1846 ATF PRESSURE SWITCH 6
AT-247
D
E
F
G
H
I
J
K
L
M
A
B
AT
Wiring Diagram — AT — FPSW6
ACS004BE
TCWA0139E
AT-248
DTC P1846 ATF PRESSURE SWITCH 6
TCM terminal and data are reference value. Measured between each terminal and ground.
Diagnostic Procedure
ACS004BF
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 “D” position (2nd
Þ
3rd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 6”.
Without CONSULT-II
1.
Start engine.
2.
Accelerate vehicle in “D” position (2nd
Þ
3rd gear).
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK POWER SOURCE CIRCUIT
1.
Turn ignition switch OFF.
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.
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
26
G/Y
PSC2 (ATF pres-
sure switch 6)
When
vehicle
cruises
When high and low reverse clutch solenoid valve ON.
0V
When high and low reverse clutch solenoid valve OFF.
Battery voltage
Item name
Condition
Display value
ATF PRES SW 6
High and low reverse
clutch solenoid valve
operates.
OFF
Other conditions
ON
PCIA0067E
Solenoid valve
Connector
No.
Terminal No.
(Wire color)
Voltage
High and low reverse
clutch solenoid valve
OFF
F104
26 (G/Y) - Ground
Battery voltage
ON
Approx. 0 V
PCIA0068E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F104
26 (G/Y)
Yes
A/T unit assembly harness
connector
F26
4 (G/Y)
SCIA3103E
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