Nissan Silvia. Instruction — part 28
Diagnostic Procedure
NMAT0226
1
CHECK GROUND CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect solenoid valve harness connector (terminal cord assembly) E25 connector in engine compartment.
3. Check resistance between solenoid valve harness connector (terminal cord assembly) E25 terminal No. 2 (R/W) and
ground.
SAT448K
Is resistance approx. 20 - 40
Ω
?
Yes
©
GO TO 2.
No
©
1. Remove control valve assembly.
Refer to AT-205.
2. Check the following items:
I
Shift solenoid valve A
Refer to “Component Inspection”, AT-110.
I
Harness of terminal cord assembly for short or open
2
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between solenoid valve harness connector E25 terminal No. 2 (R/W) and TCM harness connector
M25 terminal No. 11 (R/W).
SAT801JA
If OK, check harness for short to ground and short to power.
Is resistance approx. 0
Ω
?
Yes
©
GO TO 3.
No
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Diagnostic Procedure
AT-109
3
CHECK DTC
Perform Self-diagnosis Code confirmation procedure, AT-107.
OK or NG
OK
©
INSPECTION END
NG
©
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
SAT654IA
Component Inspection
NMAT0227
SHIFT SOLENOID VALVE A
NMAT0227S01
I
For removal, refer to AT-205.
Resistance Check
NMAT0227S0101
I
Check resistance.
Terminal
Connector
Terminal No. (Wire color)
Resistance
(Approx.)
Ω
E402
3 (L)
Ground
20 - 40
SAT653IA
Operation Check
NMAT0227S0102
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the solenoid valve harness connec-
tor (terminal cord assembly) E402 terminal No. 3 (L) and
ground.
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Diagnostic Procedure (Cont’d)
AT-110
SAT341H
Description
NMAT0228
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM
in response to signals sent from the PNP switch, vehicle speed and
throttle position sensors. Gears will then be shifted to the optimum
position.
Gear position
1
2
3
4
Shift solenoid valve A
ON (Closed)
OFF (Open)
OFF (Open)
ON (Closed)
Shift solenoid valve B
ON (Closed)
ON (Closed)
OFF (Open)
OFF (Open)
TCM TERMINALS AND REFERENCE VALUE
NMAT0228S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
12
OR/L
Shift solenoid
valve B
When shift solenoid valve B operates.
(When driving in “D
1
” or “D
2
”.)
Battery voltage
When shift solenoid valve B does not oper-
ate.
(When driving in “D
3
” or “D
4
”.)
0V
ON BOARD DIAGNOSIS LOGIC
NMAT0228S02
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: SHIFT SOLENOID/V B
TCM detects an improper voltage drop
when it tires to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Shift solenoid valve B
: 5th judgement flicker
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Description
AT-111
SAT014K
SAT812H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
=NMAT0228S04
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
WITH CONSULT-II
NMAT0228S05
1)
Start engine.
2)
Select “SELF-DIAG RESULTS” mode for “A/T” with CON-
SULT-II.
3)
Drive vehicle in D
1
,
D
2
,
D
3
position.
WITHOUT CONSULT-II
NMAT0228S06
1)
Start engine.
2)
Drive vehicle in D
1
,
D
2
,
D
3
position.
3)
Perform self-diagnosis.
Refer
to
SELF-DIAGNOSTIC
PROCEDURE
(Without
CONSULT-II), AT-37.
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Description (Cont’d)
AT-112
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