Troubleshooting
Troubleshooting Procedures (cont'd)
Symptom Chart
Listed below are symptoms and probable causes for problems that DO NOT cause the malfunction Indicator Lamp (MlL) to
come on. lf the MIL was reported on, go to page 11-32.
Troubleshooting each probable cause in the order listed (from left to right) until the symptom is eliminated.
The probable cause and troubleshooting page relerence can be found below.
Other Probable Causes for an engine that will not start:
Engine will not sta rt- Compression- Engine locked up- Timing belt
\_
- Starting system- Overheating- Battery
'4,
It
Probable Cause List (For the DTC chart. see page 11-421
Probable CausePageSystem
111-50Engine Control Module (ECM)
211118Fuel pressure
311-124PGM-Fl main relay
4Section 23lgnition system
51 1-83Crankshaft Position/ToD Dead Center/Cylinder Position sensor circuit
11-58Intake Air Temperature (lAT) sensor circuit
71 ' t- 100ldle Air Control (lAC) Valve
811110Fast idle thermo valve
I11lllldle speed adjustment
'1011-132Throttle body
111 1-130Throttle cable
1211-54lvlanifold Absolute Pressure {MAP) sensor
IJ1163Throttle Position {TP) sensor
1411-86Barometric pressure (BARO) sensor
1 '1 106A/T gear position signal {see section 23)
16'1 1 104Brake switch signal
1711 129Air Cleaner
181 1- 134Intake Air Bypass {lAB} control system and intake air pipe
19'1 1 138Three Way Catalytic Convener (TWC)
2011-141Evaporative emission (EVAP) control
21Contaminated fuelll ll 21 | - | cont"-in"t"o tu"
11 l-
I
,l 11-36
-
SYMPTOMPROBABLE CAUSE
Engine will not stan4, 2, 3,5, 21, 15, 1
Hard starting2, 4, 12, 14,20,21
Cold fast idle too low
Cold fast idle too high7, 8, 9, 11, r0
ldle speed fluctuates7,8,9,11,10
Misfire or rough runningTroubleshoot for misfire on pages 11-78,79
Low power2, 10,'t1, 13, 14, 17, 19, 12
Engine stalls2, 4,1 , 12,21,9, 5, 16
Starting System
Starter Test (cont'dl
Check Cranking rpmr
Engine speed during cranking should be above 1OO rpm.
lJ speed is too low, check for:
a Loose batlery or starter terminals
a Excessively worn starter brushes
a Open circuit in commutator segments
a Dirty or damaged helical spline or drive gear
a Defective drive gear overrunning clutch
Check Starter Disengagement:
Press the clutch pedal all the way in (M/T), turn rhe igni
tion switch to "lll" and release to "11".
The starter drive gear should disengage from the flywheel
or torque converter ring gear when you release the key.
It the drive gear hangs up on the flywheel or torque con-
verter ring gear, check for:
a Solenoid plunger and switch mallunction
a Dirty drive gear assembly or damaged overrunning
clutch
5. Check for an open in the BLK/WHT wire circuit be
tween the starter and ignition switch, and con-
necrors,
6. Check the ignition switch (see page 23-71).
7. On cars with automatic transmission, check the A/Tgear position switch (neutral position switch) and
connector. On cars with manualtransmission, check
the starter cut relay, clutch interlock switch, and
connectors.
NOTE: Check the No. 42 (40 A) fuse in the under,hoodfuse/relay box for the starter cut relay.
Check Jor Wear and Damage:
The starter should crank the engine smoothly and stead,ily. lf the starter engages, but cranks the engine errati
cally, remove it. Inspect the starter, drive gear, andllywheel or torque converter ring gear lor damage.
a Check the drive gear overrunning clutch for binding
or slipping when the armature is rotated with the drivegear held. Replace the gears i{ damaged.
Check CJanking Voltage and Current Draw:
Cranking voltage should be no less than 8.O volts.
Current draw should be no more than * amperes.* 1.2 kW: 27O A
1 .4 kW: 360 A
It cranking voltage is too low, or current draw too high,check for:
a Dead or low charged batterya Open circuit in starter armature commutator segmentsa Starter armalure dragging
a Shorted armature windinga Excessive drag in engine
Charging System
Troubleshooting
It the charging system light does not come on or does not go off, or the battery is dead or low, test the following items in
the order listed below:
1. Battery
2. Charging system light
3. Voltage
4. Alternator control system
5. Alternator/regulator
Charging System Light Test
ALTERNATOR'P CONNECTORIUSAI
IGIBLK/YEL)
Wire side offemale terminals
Wire side offemale terminals
ALTERNATOR 3PCONNECTOR lCanadal
Charging System Light Check:Make sure the charging systemlight comes on.
Ch€ck tor a blown No. 15 (7.5 A)
tuse and . blown charging sys-
tem light bulb. ll the fuse andbulb are OK, .eptir tho open inlhe WHT/BLU or BLK/YEL wire.
Does the charging systemlight come on?
Ch.rging System Light Check(cont'd):
Start the engine.
Pertorm the Ahernator/RegulstolTest (s€. prge 23-101,Does the charging systemlight go off?
Voltago Check:Measure the voltage at the No. 1
lNo. 2l terminal of the 4P [3P]connector with tho ignition switchoN {lr).
Repair tho open in ih€ 8LK/YELwir6 betweon the alte]nator andundor-dash lure/reley box.
I4
L-*
23-102
)
Troubleshooting
Self-diagnostic Procedures
The self-diagnostic function of the SRS system allows it to locate the causes of system problems and to store this informa-
tion in memorv. For easier troubleshooting, this data can be retrieved via 8 dats link circuit.
o When you turn the ignition switch ON (ll), the SRS indicator will come on. lf it goes off after six seconds, the system is
normat.
. lf there is 8n abnormality, the system locstes and defines the problem, stores this information in memory, and turns
th€ SRS indicator light on. The data will remain In the memory even when the ignition switch is turned off or if the bat-
terv is disconnected.
. When you connect the SCS service connector to the service check connector (2P), and turn the ignition switch ON {ll),
the sRs indicator light will indicate the diagnostic trouble code (DTCI by th€ number of blinks.
. After reading and recording the DTC, proceed with the troubleshooting for this code
Pr6crution!
. Use only a digital multimeter to check the system, lf it's not a Honda multimeter, make sure its output is 10 mA (0.01 A)
or less when switched to the smallest value in the ohmmeter range. A tester with a higher output could damsge the
airbag circuit or cause sccidental airbag deployment and possible injury.
. Whenever the ignition switch is ON (ll), or has been turned OFF for less than three
SRS unit; the airbags could accidentally deploy and cause damage or injuries'
. Before you remove the SRS main harness, disconnect the driver's airbag connector
conneclor.
and the front passenger's airbag
. Make sure the battery is sufficiently charged (s6e psge 23-67). lf the battsry is dead or low, msasuring values won't be
correct,
a Do not touch a tester probe to the terminals in the SRS unit or harness connectors, and do not connect the terminals
with a jumper wire. Use only the backprobe set and the SCS service connector.
For backprobing spring-loaded lock type connectors, refer to psge 23-283.
Reading the DTC
When the SRS indicator light is on, read the DTC using one ot th"sc rn"ihod<
A. Connect the Honda PGM Toster io the 16P D![! Linl Con.lac{or {DLC), tnd toalor nl -r t!'iF t tr -
indicat$ no DTC, or it indicates DTC $1 or DTC $2. doublechcd( b'Y iumdng $. !..vic. chd cdrE r€ --t
ing the SRS indicator light (see next p89€).
{cont'd)
minutes, be careful not to bump the
DATA LINK CONNECTOR (16P}
23-247
HONDA PGM TESTER