Page 228 of 1413

Troubleshooting
Self-diagnostic Procedures (cont'dl
':818C1 engine
a lf codes other than those listed above are indicated, verifv the code. lf the code indicated is not listed above, replace
rhe ECM.
a The MIL may come on, indicating a system problem when, in fact, there is a poor or intermittent electricalconnection.
First, check the electrical connections, clean or repair connections it necessary.
o The MIL and @ indicator light may light simultaneously when the Diagnostic Trouble Code (DTC) 6, 7 or 17. Check
the PGM-Fl system according to the PGM-Fl system troubleshooting, then recheck the l!! indicator light. ll it lights,
see page 14-5O, 51.
a The MIL does not come on when there is a malfunction in the A/T Fl signal or Electrical Load Detector (ELDI circuits.
However, it will indicate the codes when the Service Check Connector is shorted.
DIAGNOSTIC
TROUBLE
CODE (DTCISYSTEM INDICATEDPsge
oENGINE CONTROL MODULE IECM)11-42
,lHEATED OXYGEN SENSOR IHO25)1 1-46
aMANIFOLD ABSOLUTE PRESSURE {MAP SENSOR)11-52
4CRANKSHAFT POSITION (CKP SENSOR)1 1-56
oENGINE COOLANT TEMPERATURE (ECT SENSOR)11-58
THROTTLE POSITION (TP SENSOR}11-60
ITOP DEAD CENTER POSITION (TDC SENSORI1 1-56
9No. 1 CYLINDER POSITION (CYP SENSOR)1 1-56
10INTAKE AIR TEMPERATURE (IAT SENSOR)11-62
13BAROMETRIC PRESSURE (BARO SENSOR}1|-64
14IDLE AIR CONTROL (IAC VALVE}11-42
tcIGNITION OUTPUT SIGNAL11-66
toFUEL INJECTOR1't-102
17VEHICLE SPEED SENSOR {VSSI11-68
20ELECTRICAT LOAD DETECTOR (ELD)'t 1-70
21VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL SOLENOID
VALVE {VTEC SOLENOID VALVE)'6-36
22VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL PRESSURE
SWITCH (VTEC PRESSURE SWITCHI-6-38
23KNOCK SENSOR {KS}-11-7 4
30A/T FI SIGNAL A11-76
3'rA/T FI SIGNAL B1 1-76
4'lHEATED OXYGEN SENSOR (HO25} HEATER11-47
43FUEL SUPPLY SYSTEM1 1-50
11-36
Page 258 of 1413

PGM-FI System
Vehicle Speed Sensor (VSS)
- _-_f_-., \-=1_ -
It6l- -l tl l- The Maltuncrion Indicator Lamp (MtL)' ths Vehiclo SD6sd (VSS) circuit.
indicateE Diagnostic Trouble Code IDTC) 17: A problem in
a25 {-t
The VSS generates a pulsing signal when the front wheels turn.
@4""rr.r whadr b.lor.
l.d.lnC up tront olcat,
NOTE: Transmission in llj position lA/Tl.
- Tha mll hs b..n ltgortld o.r.* Yvlrh th. Sc]S $o.r coi[cto.connast.d l... ploa I l -341,
cod! 17 i. Indlc.i.d.
Do the ECM Basot Procodur6 16€€pag€ I I -351.
Road rosr whh A/T in13 positaon
{M/T: in 2nd O6ar), accol6rat6 to4,OOO rpm, thon d6c6l6,ate to1,5OO .pm with th.ottlo fullyclosod tor at loast 5 s6conds.
Int rmltllrt t llur., .yrtam b O|(.t drlr drr.Chcct lor poor conicctlon! oalootc wl... !t C3O5 0ocrtad rtLtt rhod. torr.l, eA24. C112IVSA) .nd ECil.
ls th6 MIL on and doos it indic.t6code 'l7 ?
Block roar whe€19 and 5st th6parking brsko. Jsck up th€ f.ontof the c6. and support with saf€-iy standa.
Turn the ignition Bwitch OFF.
Connect tho t€st hamos3 b€tw€€ntho ECM ond connoctora {as€pag6 11-37).
Tu.n th€ ignitioh switch ON.
Block the .ight lront whoel andalowly rctato loft tront wh6ol andm6asur6 voltago b€twoon BlO{+) torminal and A26 l-}terminal.
Doss voltago puleo O V and10 v?Tu.n th€ ignition switch OFF.
Sub|tllul. ! knosn{ood ECMlnd r!ch.ck. lt .Vmgiom/lndlc.-tlon g@.. .w.y, r.pLca di. orlgl-n.l ECM.
ato l+l
0- 10 V ?
11-68
lTo p6ge 1 1-691
llEur
Page 1350 of 1413
+ No.24 ll5Al: 81881 onoineNo.24 l20Al: 818C1 ensine
UNDER-DASH FUSE/RELAY BOX
HORN
Y
UNOER _HOOD FUSE/RELAY BOX
No.4l (100A) No.39l50A)
INDICATORTIGHT{0,91W}
IP
I D Suur
6yffi Bi,G#,,'.
BTK
t-
G201G401
II
I
f7
VEHICLE SPEEDSENSOR iVSS)
M/r : CLUTCH SWITCH IA/T : A/T GEAR IPOS|T|oN SWTTCH IInIEI,E) I
PNK
BI-K
T
G201G401
Cruise Gontrol
Circuit Diagram
23-244
Page 1353 of 1413

tlo.WlfeTost condition
*No. 24 (15 Al: 81881 engine
No.24 l2O A): 818C1 engine
Tost: Desired rosultPossibl6 caus€ it losult is not obtained
IBLKUnder all conditionsCheck for continuity to ground:
There should be continuitv.
. Poor ground (G201, G4011. An open in the wire
2BLKryEL
lgnition switch ON (ll)Check for voltage to ground:
There should be battery voltage.
. Blown rNo. 24 fuse in the under-
dash fuse/relay box. An open in the wire
5LT GRNlgnition switch ON (ll)
and main switch ON
Check for voltage to ground:
There should be battery volt€ge.
. Faulty main switch. An open in the wire
4GRY
lgnition switch ON lll),main switch ON and
brake pedal pushed,
then released
Check for voltage to g,ound;
There should be O V with thepedal pushed and battery
voltage with the pedal released,
. Faulty brake switch. An open in the wire
GRN/wHT
Brake pedal push€d,
then r€leased
Check tof voltage to ground:
There should be battery voltage
with the pedal pushed, and O V
with the Dedal released.
Blown No. 42 l2O Al tuse in the
under-hood fuse/relay box
Faulty brake switch
An open in the wire
6RED/BLU
lgnition switch ON (ll)Connect to ground; Indicator
light in the gauge assembly
comes on.
Blown bulb
Blown No. 15 (10 A) fuse in the
under-dash fuse/relay box
Faulty dimming circuit in the gauge
assembly
An open in the wire
7LT GRN/
BLK
RESUME button
pushedCheck for voltage to ground:
There should be battery voltage.
Faulty SET/RESUME switch
Faulty cable reel
An open in the wire6LT GRN/
RED
SET button pushed
qPNK
MT/: Clurch pedal
released
A/T: Shift l€ver in [Zl,
lD:I, or lE.l
-
Check for continuity to ground:
There should be continuity.
NOTE: There should be no con-
tinuity when the clutch pedal is
depressed or when the shift
lever is in other positions.
Faulty or misadiusted clutch switch(M/T)
Faulty A/T gear position switch(A/T)
Poor ground (G201 ,G4O1)An open in the wire
10BLUStart the engine.Chsck for voltage to ground:
There should be battery voltage.
. Faulty ignition system or ECM. An open in the wire
11ORN
lgnition switch ON (ll)
and main switch ON;
rsise the front of the
car, rotat€ one wheel
slowly.
Check Jor voltage between the
ORN @ and BLK O terminals:
There should be O- about
10 V-O- about 1O V
repeatedly.
. Faulty vehicle speed sensor (VSSI. An oDen in the wire
'128RN/WHTConnect battery power
to the BRN/WHT
terminal and ground to
the BRN/BLK terminal.
Check the sound of the actuator
motor: You should hear the mo-
tor running smoothly.
. Faulty actuator. An opsn in the wire
13BRN/BLK
14BRN/RED
Connect battery power
to the BRN/RED
terminal.
Check the operation of the mag-
netic clutch: Clutch should click
and output link should be locked.
Faulty actuator
An open in the wire
Poor ground (G3O 1)
il:
23-247