Infiniti Q45. Manual — part 65
MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-173
D
E
F
G
H
I
J
K
L
M
A
B
AT
MAIN POWER SUPPLY AND GROUND CIRCUIT
PFP:00100
Wiring Diagram — AT — MAIN
NCS00104
TCWM0305E
AT-174
MAIN POWER SUPPLY AND GROUND CIRCUIT
TCM terminals and data are reference value. Measured between each terminal and ground.
Diagnostic Procedure
NCS00105
1.
CHECK TCM POWER SOURCE STEP 1
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Check voltage between A/T assembly harness connector termi-
nals and ground.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK TCM POWER SOURCE STEP 2
1.
Disconnect A/T assembly harness connector.
2.
Turn ignition switch ON. (Do not start engine.)
3.
Check voltage between A/T assembly harness connector termi-
nals and ground.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
Terminal
Wire
color
Item
Condition
Data (Approx.)
1
W/B
Power supply
(Memory back-up)
Always
Battery voltage
2
W/B
Power supply
(Memory back-up)
Always
Battery voltage
5
B
Ground
Always
0 V
6
G/R
Power supply
–
Battery voltage
–
0 V
10
B
Ground
Always
0 V
Item
Connector
Terminal
Voltage
TCM
F26
1 - Ground
Battery voltage
2 - Ground
6 - Ground
0 V
SCIA2104E
Item
Connector
Terminal
Voltage
TCM
F26
1 - Ground
Battery voltage
2 - Ground
6 - Ground
SCIA2105E
MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-175
D
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A
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AT
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
Harness for short or open between battery and A/T assembly harness connector terminals 1, 2
●
Harness for short or open between ignition switch and A/T assembly harness connector terminal 6
●
10A fuse (No. 75, located in the fuse, fusible link and relay block) and 10A fuse (No. 35, located in the
fuse block No.2). Refer to
PG-53, "Electrical Units Location"
.
●
.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK TCM GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Check continuity between A/T assembly harness connector ter-
minals and ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
5.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
.
OK or NG
OK
>> INSPECTION END
NG-1
>> Self-diagnosis does not activate: GO TO 7.
NG-2
>> DTC is displayed: Check the malfunctioning system. Refer to
.
Continuity should exist.
SCIA2106E
AT-176
MAIN POWER SUPPLY AND GROUND CIRCUIT
7.
CHECK TERMINAL CORD ASSEMBLY
1.
Remove control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Temperature
2.
Disconnect A/T assembly harness connector and TCM connector.
3.
Check continuity between A/T assembly harness connector ter-
minals and TCM connector terminals.
4.
Check continuity between A/T assembly harness connector ter-
minals and TCM connector terminals.
5.
If OK, check harness for short to ground and short to power.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Tem-
NG
>> Replace open circuit or short to ground and short to power in harness or connectors.
Item
Connector
Terminal
Continuity
A/T assembly harness con-
nector
F26
1
Yes
TCM connector
F502
9
A/T assembly harness con-
nector
F26
2
Yes
TCM connector
F502
10
A/T assembly harness con-
nector
F26
6
Yes
TCM connector
F502
4
SCIA5464E
Item
Connector
Terminal
Continuity
A/T assembly harness con-
nector
F26
5
Yes
TCM connector
F504
21
A/T assembly harness con-
nector
F26
10
Yes
TCM connector
F504
22
SCIA5465E
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