Infiniti QX4 (R50). Manual — part 52
Diagnostic Procedure
NBAT0226
1
CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “TURBINE REV”. Check the value changes according to engine speed.
SAT740J
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 38 and ground. (Measure in AC range.)
SAT140K
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING ITEM
Check harness for short or open between TCM and turbine revolution sensor.
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace damaged parts.
3
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-203.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC TURBINE REVOLUTION SENSOR
Diagnostic Procedure
AT-205
4
CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminal for damage or loose connection with harness connector.
OK or NG
OK
©
INSPECTION END
NG
©
Repair or replace damaged parts.
SAT141K
Component Inspection
NBAT0227
TURBINE REVOLUTION SENSOR
NBAT0227S01
I
Check resistance between terminals 1, 2 and 3.
Terminal No.
Resistance (Approx.)
1
2
2.4 - 2.8 k
Ω
1
3
No continuity
2
3
No continuity
DTC TURBINE REVOLUTION SENSOR
Diagnostic Procedure (Cont’d)
AT-206
Description
NBAT0228
The ECM and TCM provide mutual communication in relation to
engine output control signal (ignition timing retard signal) during
rapid standing starts/acceleration. With this consistent real-time
control, the shifting feel is substantially improved.
TCM TERMINALS AND REFERENCE VALUE
NBAT0228S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
33
G/R
LAN
—
—
*: This terminal is connected to the ECM.
ON BOARD DIAGNOSIS LOGIC
NBAT0228S02
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: A/T COMM LINE
The ECM-A/T communication line is
open or shorted.
I
Harness or connector
: 12th judgement flicker
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC A/T COMMUNICATION LINE
Description
AT-207
SAT014K
SAT971J
SAT682I
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0228S03
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3)
Wait at least 6 seconds or start engine and wait for at least 6
seconds.
No Tools
1)
Turn ignition switch “ON”.
2)
Wait at least 6 seconds or start engine and wait for at least 6
seconds.
3)
Perform self-diagnosis.
Refer to TCM SELF-DIAGNOSTIC PROCEDURE (No Tools),
AT-46.
DTC A/T COMMUNICATION LINE
Description (Cont’d)
AT-208
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