Honda Prelude 1993 Service Manual page 292

' . 1
'tJ
Troubleshooting
Self-diagnostic Procedures (cont'dl
*: Except F22A1 engine(Sl
":
H22A'l engine {USA: Si VTEC/Canada: SR-V)
a lf codes other than those listed above are indicated, verify the code. It the code indicated is not listed above, replace
the EcM.
a The Malfunction Indicator Lamp (MlL) may come on, indicsting a system problem when, in fact, there is a poor or
intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.
a The MIL and D4 indicator light may light simultaneously when the code blinks 6, 7 and 17.
Check the PGM-FI system according to the PGM-FI system troubleshooting, then recheck the D4 indicator light. lf
it lights, see page l4-36.
a The MIL does not come on when there is a maltunction in the A/T Fl signal or slectricsl losd detector circuits. However,
it will indicate the codes when the service check connector is iumDed.
DIAGONOSTIC
TROUBLE
coDE (DTC)
SYSTEM INDICATED Page
o ENGINE CONTROL MODULE (ECMI
1 1 - 5 0
HEATED OXYGEN SENSOR (HO23)
I t - 5 0
MANIFOLD ABSOLUTE PRESSURE (MAP SENSOR)
1 1 - 6 4 ,
6 8 5
4
CRANKSHAFT POSITION (CKP SENSOR}
1 1 - 7 0
6
ENGINE COOLANT TEMPERATURE (ECT SENSORI
7
THROTTLE POSITION (TP SENSOR}
1 1 - 7 4
I TOP DEAD CENTER POSITION (TDC SENSOR}
1 1 - 7 0
9
N o , 1 CYLINDER POSITION {CYP SENSOR) 1 1 - 7 0
1 0 INTAKE AIR TEMPERATURE
(IAT SENSOR}
1 1 - 7 6
't2
EXHAUST GAS RECIRCULATION IEGR VALVE LIFT SENSOR) 1 1 - ' l 5 3
1 3
EAROMETRIC PRESSURE (8ARO SENSOR)
1 1 - 7 9
1 4
IDLE AIR CONTROL (IAC VALVE)
1 1 - 9 6
t c I G N I T I O N O U T P U T S I G N A L 1 1 - 8 0
t o
FUEL INJECTOR 1 1 - 1 1 6
VEHICLE SPEED SENSOR IVSS)
1' 1-82
2 0 ELECTRICAL
LOAD DETECTOR (ELD)
'I
1-84
21
VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL {VTEC}
SOLENOID VALVE *'
6-75
22
VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL {VTECI
PRESSURE SWITCH* *
6-77
2 3
K N O C K S E N S O R ( K S } I
1 1 - 8 8
4'l
HEATED OXYGEN SENSOR (HO2S) HEATER
1 1 - 5 8
43 FUEL SUPPLY SYSTEM
11-62
11-44