Infiniti I35 (A33). Manual — part 26
Wiring Diagram — AT — MAIN
NHAT0032
MAT470B
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram — AT — MAIN
AT-101
TCM TERMINALS AND REFERENCE VALUE
=NHAT0032S01
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
10
R/Y
Power source
or
When turning ignition switch to ON.
Battery volt-
age
When turning ignition switch to OFF.
0V
19
R/Y
Power source
Same as No. 10
25
B
Ground
—
0V
28
Y/R
Power source
(Memory back-up)
or
When turning ignition switch to OFF.
Battery volt-
age
When turning ignition switch to ON.
Battery volt-
age
48
B
Ground
—
0V
Diagnostic Procedure
NHAT0033
1
CHECK TCM POWER SOURCE STEP 1
1. Turn ignition switch to ON position.
(Do not start engine.)
2. Check voltage between TCM harness connectors F50, 51 terminals 10 (R/Y), 19 (R/Y), 28 (Y/R) and ground.
SAT611J
OK or NG
OK
©
GO TO 2.
NG
©
GO TO 3.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram — AT — MAIN (Cont’d)
AT-102
2
CHECK TCM POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.
2. Check voltage between TCM harness connector F50 terminal 28 (Y/R) and ground.
SAT612JF
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING ITEM
Check the following items:
I
Harness for short or open between battery, ignition switch and TCM harness connectors F50, F51 terminals 10 (R/Y),
19 (R/Y) and 28 (Y/R)
I
Fuse
I
Ignition switch
Refer to EL-11, “POWER SUPPLY ROUTING”.
OK or NG
OK
©
GO TO 4.
NG
©
Repair or replace damaged parts.
4
CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM harness connector F50 terminals 25 (B), 48 (B) and ground. Refer to wiring diagram —
AT — MAIN.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK
©
INSPECTION END
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Diagnostic Procedure (Cont’d)
AT-103
Description
NHAT0252
CAN (Controller Area Network) is a serial communication line for
real time application. It is an on-vehicle multiplex communication
line with high data communication speed and excellent error detec-
tion ability. Many electronic control units are equipped onto a
vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN
communication, control units are connected with 2 communication
lines (CAN H line, CAN L line) allowing a high rate of information
transmission with less wiring. Each control units transmits/receives
data but selectively reads required data only.
TCM TERMINALS AND REFERENCE VALUE
NHAT0252S01
Remarks: Specification data are reference values.
Terminal No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
5
L
CAN-H (high)
—
—
6
R
CAN-L (low)
—
—
On Board Diagnosis Logic
NHAT0253
Diagnostic trouble code CAN COMM CIRCUIT with CONSULT-II or
U1000 without CONSULT-II is detected when malfunction is
detected in CAN communication line.
Possible Cause
NHAT0254
Check harness or connector.
(CAN communication line is open or shorted.)
DTC U1000 CAN COMMUNICATION LINE
Description
AT-104
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