Infiniti G20 (P11). Manual — part 53
ON BOARD DIAGNOSIS LOGIC
NCAT0076S03
Diagnostic trouble code
Malfunction is detected when ...
Check items (Possible cause)
: BATT/FLUID TEMP SEN
TCM receives an excessively low or high
voltage from the sensor.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
A/T fluid temperature sensor
: 8th judgement flicker
SAT014K
SAT971J
SAT335HC
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0076S04
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Start engine.
2)
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 20 km/h (12
MPH).
Without CONSULT-II
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 20 km/h (12
MPH).
3)
Perform self-diagnosis.
Refer to TCM SELF-DIAGNOSTIC PROCEDURE (No Tools),
AT-49.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Description (Cont’d)
AT-209
Wiring Diagram — AT — BA/FTS
NCAT0214
TAT238
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Wiring Diagram — AT — BA/FTS
AT-210
Diagnostic Procedure
NCAT0077
1
CHECK TCM POWER SOURCE
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
Voltage:
Battery voltage
3. Turn ignition switch to “OFF” position.
4. Check voltage between TCM terminal 28 and ground.
Voltage:
Battery voltage
SAT461J
OK or NG
OK
©
GO TO 2.
NG
©
Check the following items:
I
Harness for short or open between ignition switch and TCM (Main harness)
I
Ignition switch and fuse
Refer to EL-9, “POWER SUPPLY ROUTING”.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Diagnostic Procedure
AT-211
2
CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminals 6 and 7 when A/T is cold.
Resistance:
Cold [20°C (68°F)]
Approximately 2.5 k
Ω
SAT912J
4. Reinstall any part removed.
OK or NG
OK (With CONSULT-II)
©
GO TO 3.
OK (Without CONSULT-
II)
©
GO TO 4.
NG
©
1. Remove oil pan.
2. Check the following items:
I
A/T fluid temperature sensor
Refer to “Component Inspection”, AT-214.
I
Harness of terminal cord assembly for short or open
3
CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITH CONSULT-II)
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 “FLUID TEMP SE”.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately 1.5V
→
0.5V
SAT614J
OK or NG
OK
©
GO TO 5.
NG
©
Check the following item:
I
Harness for short or open between TCM, ECM and terminal cord assembly (Main har-
ness)
I
Ground circuit for ECM
Refer to EC-147, “TROUBLE DIAGNOSIS FOR POWER SUPPLY”.
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Diagnostic Procedure (Cont’d)
AT-212
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