Throttle Position Sensor - Honda Civic 1998 Service Manual

Troubleshooting
Troubleshooting Procedures {cont'd)
Symptom Chart
Listed below are symptoms and probable causes for problems that DO NOT cause the lvlalfunction indicator Lamp (MlL) to
c o m e o n . l i t h e M I L w a s r e p o r t e d o n , g o t o p a g e ' 1 1 - 4 2 .
Troubleshoot each probable cause in the order listed lfrom left to right) until the symptom is eliminated.
The probable cause and troubleshooting page reference can be found below.
Other Probable Causes for an engine that will not start:
- Compression
- Starting system
-
Intake air leakage - Overheating
-
Engine locked up
-
Battery
- Timing belt
Probable Cause List (For the DTC Chart, see page 11-531
\
SYMPTOM
PROEABLE CAUSE
Engine will not start
4 , 2 , 3 , 5 , 2 0 , 1 4 , 1
Hard staning
2 , 4 . 1 1 , 1 6 , 1 3 , ' t 9
Cold fast idle too low
7, 8, 6, 16
Cold fast idle too high
7 , 8 , 1 0 , 9
ldle speed tluctuates
7 , 8 , 1 0 , 9
M i s f i r e o r r o u g h r u n n i n g
Troubleshoot tor misfire on pages 11-105, 108
Low power
2 , 9 , 1 0 , ' t 2 , 1 1 , 1 6 , 1 8 , 2 0
E n g i n e s t a l l s
2 , 4 , 1 1 , 7 , 2 0 , A , 5 , 1 5
Probable Cause
Page
System
1
I t - o J
Engine Control Module (ECM)/Powertrain
Controt Module (PCM)
1 ' t - 1 5 0 , 1 s 1
Fuel pressure
1 I -157
PGM-Fl main relay
4 Section 23
lgnition system
1 1 - 1 1 0 , 1 1 7
Crankshaft Position/Top Dead Center/Cylinder Position sensor circuit, CKF sensor
circuit
6 11-73 Intake Air Temperature {lAT) sensor circuit
7
1 1 - ' t 2 6 , 1 2 8
ldle Air Control Valve (IACV)
8
11-141, 142,
1 4 3 , 1 4 4
ldle speed adjustment
9 1 t - 1 6 4 Throttle body
1 0
11-162 Thronle cable
' t 1
11-67 Manifold Absolute Pressure (MAP) sensor
12
1' t-79 Throttle Position (TP) sensor
I J
1 11 1 3
Barometric pressure (BARO) sensor
1 4
Section 14, 1'l-139 A/T gear posilion signal (see page '1'l-137) or clutch switch signal
1 1 - 1 3 4
Brake switch signal
11-162 A i r C l e a n e r
1 1 Intake air pipe
1 8
1 l - 1 6 8
Three Way Catalytic Converter (TWC)
1 9 1 1 - 1 8 1 Evaporative emission (EVAP) control
20
Contaminated fuel
1 1 - 4 6