Nissan Silvia. Manual — part 26
Diagnostic Procedure
NMAT0222
1
CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control. Refer to EC-35, “Description”.
OK or NG
OK
©
GO TO 2.
NG
©
Check throttle position sensor circuit for engine control. Refer to EC-141, “Component
Description”.
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Diagnostic Procedure
AT-101
2
CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “THRTL POS SEN”.
Voltage:
Fully-closed throttle:
Approximately 0.5V
Fully-open throttle:
Approximately 4V
SAT614J
Without CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM harness connector M26 terminal Nos. 41 (R/Y) and 42 (GY) while accelerator pedal is
depressed slowly.
Voltage:
Fully-closed throttle valve:
Approximately 0.5V
Fully-open throttle valve:
Approximately 4V
(Voltage rises gradually in response to throttle position.)
SAT513JC
OK or NG
OK (With CONSULT-II)
©
GO TO 3.
OK (Without CONSULT-
II)
©
GO TO 4.
NG
©
Check harness for short or open between ECM and TCM regarding throttle position sen-
sor circuit. (Main harness)
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Diagnostic Procedure (Cont’d)
AT-102
3
CHECK THROTTLE POSITION SWITCH CIRCUIT (With CONSULT-II)
With CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out “CLOSED THL/SW” and “W/O THRL/P-SW” depressing and releasing accelerator pedal.
Check the signal of throttle position switch is indicated properly.
MTBL0011
SAT646J
OK or NG
OK
©
GO TO 5.
NG
©
Check the following items:
I
Throttle position switch
Refer to “Component Inspection”, AT-105.
I
Harness for short or open between ignition switch and throttle position switch (Main
harness)
I
Harness for short or open between throttle position switch and TCM (Main harness)
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Diagnostic Procedure (Cont’d)
AT-103
4
CHECK THROTTLE POSITION SWITCH CIRCUIT (Without CONSULT-II)
Without CONSULT-II
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM harness connector M25 terminal Nos. 16 (LG), 17 (R) and ground while depressing, and
releasing accelerator pedal slowly. (after warming up engine)
MTBL0637
SAT526JC
OK or NG
OK
©
GO TO 5.
NG
©
Check the following items:
I
Throttle position switch
Refer to “Component Inspection”, AT-105.
I
Harness for short or open between ignition switch and throttle position switch (Main
harness)
I
Harness for short or open between throttle position switch and TCM (Main harness)
5
CHECK DTC
Perform Self-diagnosis Code confirmation procedure, AT-99.
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.
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Diagnostic Procedure (Cont’d)
AT-104
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