Nissan Silvia. Manual — part 137
20
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY (FOR M/T MODELS)
With CONSULT-II
NOTE:
Always warm up engine to normal operating tempearture. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine.
2. Warm up engine to normal operating temperature.
3. Select “CLSD THL POS” in “DATA MONITOR” mode with CONSULT-II.
4. Stop engine. (Turn ignition switch “OFF”.)
5. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
6. Turn ignition switch “ON” and wait at least 5 seconds.
7. Repeat steps 5 and 6 until “CLSD THL POS” signal changes to “ON”.
SEF061Y
OK or NG
©
GO TO 24.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-63
21
CHECK THROTTLE POSITION SENSOR IDLE POSITION-I (FOR M/T MODELS)
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Connect throttle position sensor harness connector.
3. Turn ignition switch “ON” and accelerator pedal fully released.
4. Check voltage between ECM terminal 20 and engine ground.
SEC354C
Voltage: 0.35 - 0.65V
OK or NG
OK
©
GO TO 24.
NG
©
GO TO 22.
22
ADJUST THROTTLE POSITION SENSOR IDLE POSITION (FOR M/T MODELS)
Without CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until voltage between ECM terminal 20 and ground
becomes 0.35 to 0.65V.
SEC352C
3. Tighten throttle position sensor.
©
GO TO 23.
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-64
23
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY (FOR M/T MODELS)
Without CONSULT-II
NOTE:
Always warm up engine to normal operating tempearture. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine.
2. Warm up engine to normal operating temperature.
3. Stop engine. (Turn ignition switch “OFF”.)
4. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
5. Turn ignition switch “OFF” and wait at least 5 seconds.
6. Repeat steps 4 and 5, 20 times.
©
GO TO 24.
24
CHECK TARGET IDLE SPEED
With CONSULT-II
1. Start and rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
2. Select “CMPS-RPM (REF)” in “DATA MONITOR” mode with CONSULT-II.
3. Read idle speed.
800
±
50 rpm (in “P” or “N” position)
Without CONSULT-II
1. Start and rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
2. Check idle speed.
800
±
50 rpm (in “P” or “N” position)
OK or NG
OK
©
GO TO 30.
NG
©
GO TO 25.
25
CHECK FOR INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an air leak from PCV hose and after IACV-AAC valve.
OK or NG
OK
©
GO TO 27.
NG
©
GO TO 26.
26
REPAIR MALFUNCTION
1. Stop engine.
2. Repair or replace malfunctioning part.
OK or NG
With CONSULT-II
©
GO TO 3.
Without CONSULT-II
©
GO TO 7.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-65
27
CHECK IACV-AAC VALVE CIRCUIT AND FUNCTION
Check the IACV-AAC valve circuit and function. Refer to EC-166.
OK or NG
OK
©
GO TO 29.
NG
©
GO TO 28.
28
REPAIR MALFUNCTION
Repair or replace malfunction part following the “Diagnostic Procedure” corresponding the detected malfunction.
With CONSULT-II
©
GO TO 3.
Without CONSULT-II
©
GO TO 7.
29
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to “NATS (Nissan Anti-Theft
System)”, EC-34.
With CONSULT-II
©
GO TO 3.
Without CONSULT-II
©
GO TO 7.
30
ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC might be displayed.
Erase the stored memory in ECM.
Refer to “HOW TO ERASE DTC”, EC-33.
©
INSPECTION END
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-66
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