'00 - 01 models:
Vacuum hose No.
LEFT PRIMARY HEATED OXYGEN SENSOR (LEFT PRIMARY
HO2S) (BANK 2, SENSOR 1)
RIGHT PRIMARY HEATED OXYGEN SENSOR (RIGHT
PRIMARY
HO2S) (BANK
1,
SENSOR
1)
SECONDARY HEATED OXYGEN SENSOR (SECONDARY
HO2S) (SENSOR 2)
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
INTAKE AIR TEMPERATURE (IAT) SENSOR
LEFT KNOCK SENSOR (BANK 2)
RIGHT KNOCK SENSOR (BANK 1)
IDLE AIR CONTROL (IAC) VALVE
IDLE AIR CONTROL (IAC) THERMAL VALVE
THROTTLE BODY
IDLE ADJUSTING SCREW
INJECTOR
FUEL PULSATION DAMPER
FUEL FILTER
FUEL PRESSURE REGULATOR
PRESSURE REGULATOR VACUUM CONTROL SOLENOID
VALVE
FUEL PUMP
FUEL TANK
FUEL TANK VAPOR CONTROL VALVE
FUEL TANK VAPOR RECIRCULATION VALVE
AIR CLEANER
RESONATOR
INTAKE MANIFOLD RUNNER CONTROL (IMRC) CHECK
VALVE
INTAKE MANIFOLD RUNNER CONTROL (IMRC) VACUUM
RESERVOIR
INTAKE MANIFOLD RUNNER CONTROL (IMRC) SOLENOID
VALVE 1
INTAKE MANIFOLD RUNNER CONTROL (IMRC)
DIAPHRAGM 1
INTAKE MANIFOLD RUNNER CONTROL (IMRC) SOLENOID
VALVE 2
INTAKE MANIFOLD RUNNER CONTROL (IMRC)
DIAPHRAGM 2
EXHAUST GAS RECIRCULATION (EGR) VALVE VACUUM
CONTROL VALVE
EXHAUST GAS RECIRCULATION (EGR) VALVE VACUUM
CONTROL SOLENOID VALVE
EXHAUST GAS RECIRCULATION (EGR) VALVE and POSI-
TION SENSOR
POSITIVE CRANKCASE VENTILATION (PCV) VALVE
EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE
EVAPORATIVE EMISSION (EVAP) CANISTER
EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT
VALVE
EVAPORATIVE EMISSION (EVAP) CANISTER FILTER
EVAPORATIVE EMISSION (EVAP) TWO WAY VALVE
EVAPORATIVE EMISSION (EVAP) BYPASS SOLENOID
VALVE
FUEL TANK PRESSURE (FTP) SENSOR
THREE WAY CATALYTIC CONVERTER (TWC)
ENGINE MOUNT CONTROL SOLENOID VALVEProCarManuals.com
PCM
PCM
COVER
9.8 N-m
(1.0 kgf-m,
7.2 Ibf-ft)
6. After completing your tests, reinstall both PCM's, and destroy the temporary key.
If the inspection for a particular code requires voltage or resistance checks at the PCM connectors, remove the right
door sill molding. Pull the carpet back to expose the PCM. Unbolt the PCM cover, and connect the backprobe sets and
a digital multimeter as described below. Check the system according to the procedure described for the appropriate code(s)
listed on the following pages.
DONOR
KEY
TEMPORARY
KEY
Troubleshooting
Troubleshooting Procedures (cont'd)
IV. Known-Good PCM Substitution
Use the following procedure if you need a known-good PCM to test a vehicle. It allows you to swap an PCM from a
"donor" vehicle without having to program it to the test vehicle's ignition key.
1. Cut a temporary ignition key for the test vehicle with a non-immobilizer key blank.
2. Remove the PCM from the test vehicle.
3. Write the test vehicle's VIN on the PCM you just removed to avoid confusing it with the donor vehicle's PCM.
4. Remove the known-good PCM from the donor vehicle, and install it in the test vehicle.
5. Tape the donor vehicle's ignition key head-to-head to the test vehicle's temporary key. The PCM will recognize the code
from the donor vehicle's key and allow you to start the engine with the temporary key.ProCarManuals.com
How to Set Readiness Codes
Catalytic Converter
NOTE:
• Do not turn the ignition switch OFF.
• When the battery negative cable is disconnected, all
readiness codes are cleared.
Required condition ('96 - 97 models):
• Ambient temperature between 32 - 95°F (0 - 35°C).
• Altitude below 2,400 m (7,874 ft.).
Required condition ('98 - 01 models):
Ambient temperature between 20 - 95°F (-7 - 35°C).
1. Connect the scan tool to the Data Link Connector
(DLC).
2. Start the engine. Hold it at 3,000 rpm with no load
(in Park or neutral) until the radiator fan comes on.
3. Drive for about 10 minutes without stopping on a
highway or freeway. Your speed can vary.
4. '96 - 97 models:
With the transmission in D4 position, drive at a
steady speed between 33 - 37 mph (53 - 59 km/h)
for 30 seconds.
'98 - 01 models:
With the A/T in D4 position, drive at a steady speed
between 50 - 62 mph (80 - 100 km/h) for 30 sec-
onds.
5. Do step 4 three times. Between each repetition,
close the throttle completely for 1 - 2 seconds. If the
engine is stopped during this part of the procedure,
go to step 3 and do the procedure again.
6. Check for the readiness code with the scan tool.
EGR Monitor
NOTE:
• Do not turn the ignition switch OFF.
• When the battery negative cable is disconnected, all
readiness codes are cleared.
Required condition ('96 - 97 models):
Altitude below 2,400 m (7,874 ft.).
1. Connect the scan tool to the Data Link Connector
(DLC).
2. Start the engine, and hold it at 3,000 rpm with no
load (in Park or neutral) until the radiator fan comes
on.
3. Drive at a steady speed with the transmission in D4
position, between 50 - 62 mph (80 - 100 km/h) for
more than 10 seconds.
4. With the A/T in D4 position, decelerate from 62 mph
(100 km/h) by completely releasing the throttle for
at least 5 seconds. If the engine is stopped during
this procedure, go to step 3 and do the procedure
again.
5. Check for the readiness code with the scan tool.
EVAP Leak Monitor
NOTE:
• When the battery negative cable is disconnected, all
readiness codes are cleared.
• If the engine is stopped while doing the procedure
between stops 6 and 16, do this procedure from step
1 again.
1. Make sure the gasoline level is 60 - 90% of fuel tank
capacity (not full).
2. Turn the ignition switch OFF.
3. Let the vehicle sit more than 8 hours.
4. '96 - 97 models:
Make sure the outside temperature is 32 - 95°F (0 -
35°C).
'98 - 01 models:
Make sure the outside temperature is 20 - 95°F (-7 -
35°C).
5. Connect the scan tool to the Data Link Connector
(DLC).
6. Start the engine and drive for about 15 minutes.
7. '96 - 97 models:
Keep the vehicle at a steady speed between 50 - 62
mph (80 - 100 km/h), without moving the accelera-
tor pedal, for about 1 minute.
'98 - 01 models:
Keep the vehicle at a steady speed between 50 - 70
mph (80 - 114 km/h), without moving the accelera-
tor pedal, for about 1 minute.
8. Stop the vehicle (do not stop engine).
9. Repeat steps 7 and 8 two more times.
10. Check for the readiness code with the scan tool. If
the readiness code does not set, go to step 11.
11. When ambient temperature is less than 32°F (0°C),
hold the engine at 3,000 rpm with no load (in Park
or neutral) until the radiator fan comes on.
12. When ambient temperature is more than 86°F
(30°C), remove the fuel fill cap, then install the fuel
fill cap.
13. After step 12, drive for about 20 minutes on a free-
way.
14. '96 - 97 models:
Keep the vehicle at a steady speed between 50 - 62
mph (80 - 100 km/h), without moving the accelera-
tor pedal, for about 1 minute.
'98 - 01 models:
Keep the vehicle at a steady speed between 50 - 70
mph (80 - 114 km/h), without moving the accelera-
tor pedal, for about 1 minute.
15. Stop the vehicle (do not stop the engine).
16. Repeat steps 14 and 15 two more times.
17. Check for the readiness code with the scan tool.ProCarManuals.com
PGM-FI System
How to Set Readiness Codes (cont'd)
HO2S Monitor
NOTE:
• Do not turn the ignition switch OFF.
• When the battery negative cable is disconnected, all
readiness codes are cleared.
Required condition ('96 - 97 models):
• Ambient temperature between 32 - 95°F (0 - 35°C).
• Altitude below 2,400 m (7,874 ft.).
Required condition ('98 - 01 models):
Ambient temperature between 20 - 95°F (-7 - 35°C).
1. Connect the scan tool to the Data Link Connector
(DLC).
2. Start the engine, and hold it at 3,000 rpm with no
load (in Park or neutral) until the radiator fan comes
on.
3. Let the engine idle for 5 seconds.
4. Drive at a steady speed between 50 - 62 mph (80 -
100 km/h) for about 2 minutes.
5. With the A/T in D4 position, decelerate from 62 mph
(100 km/h) by completely releasing the throttle for
at least 5 seconds. If the engine is stopped during
this procedure, go to step 4 and do the procedure
again.
6. Check for the readiness code with the scan tool.
HO2S Heater Monitor
NOTE: When the battery negative cable is disconnected,
all readiness codes are cleared.
1. Connect the scan tool to the Data Link Connector
(DLC).
2. Start the engine, and let the engine idle for 10 min-
utes.
3. Check for the readiness code with the scan tool.ProCarManuals.com
MIL Circui t Troubleshootin g
Turn th e ignitio n switc h O N (II )
an d watc h th e Malfunctio n
Indicato r Lam p (MIL) . NOTE
:
I f thi s sympto m is intermittent , chec k fo r th e followin g problems .
• Th e MI L neve r come s o n afte r th e ignitio n switc h is turne d O N (II) .
— A loos e No . 6 EC U (PCM ) (2 0 A ) fus e in th e under-das h fuse/rela y bo x
— A loos e No . 2 2 FUE L PUM P (2 0 A ) fus e in th e under-das h fuse/rela y bo x
— A n intermitten t shor t i n th e wir e betwee n th e PC M (A7 ) an d th e gaug e assembl y
— A n intermitten t shor t i n th e wir e betwee n th e PC M (D10 ) an d th e MA P senso r
— A n intermitten t shor t i n th e wir e betwee n th e PC M (D21 ) an d th e T P sensor , EG R
valv e positio n sensor , fue l tan k pressur e sensor , TC S contro l valv e angl e senso r (wit h
TCS , VSA* )— A loos e No . 2 5 IG COI L (3 0 A ) fus e in th e under-das h fuse/rela y bo x
— PGM-F I mai n rela y
• Th e MI L stay s o n o r come s o n afte r 2 second s wit h th e ignitio n switc h turne d O N (II) .
— A n intermitten t shor t i n th e wir e betwee n th e PC M (C5 ) an d th e servic e chec k con -
nector , dat a lin k connector *
— A n intermitten t ope n in th e wire s betwee n th e PC M (D22 ) an d th e servic e chec k connec -
tor— A n intermitten t shor t i n th e wir e betwee n th e PC M (A7 ) an d th e gaug e assembly .
• Se e th e OBDI I sca n too l o r Hond a PG M Teste r user' s manual s fo r specifi c operatin g
instructions .
Doe s th e MI L com e o n an d
sta y on ?
YE S
(To pag e 11-66 )
Doe s th e lo w oi l pressur e
indicato r ligh t com e on ?
NO
YE S
Repai r shor t o r ope n i n th e
wir e betwee n No . 2 0 EC U
(PCM ) (2 0 A ) fus e an d gaug e
assembly .Replace No . 2 0 EC U (PCM ) (2 0A) fuse .
Check th e engin e starting :
Tr y t o star t th e engine .
Doe s th e engin e start ?
YES
(To pag e 11-68 )
* : '0 0 - 0 1 model s
(T
o pag e 11-64 )
NO
Chec k th e fuse :1. Tur n th e ignitio n switc h OFF .
2 . Tur n th e ignitio n switc h O N (II) . *
: '0 0 - 0 1 model s
ProCarManuals.com
Manifold Absolut e Pressur e (MAP ) Senso r
The sca n tool indicate s Diagnosti c Trouble Code (DTC ) P0106 : A range/performanc e problem (vacuu m leak) in
th e Manifol d Absolut e Pressur e (MAP ) Senso r system .
The MA P senso r convert s manifol d absolut e pressur e int o electrica l signal s an d input s th e PCM .
SENSO RUNIT
— Th e MI L ha s bee n reporte d on .
— DT C P010 6 is stored .
— O r fro m Probabl e Caus e List .
Proble m verification :
1. D o th e PC M Rese t Procedure .2. Star t th e engin e an d kee p
engin e spee d a t 1,00 0 rp m fo r
1 minut e wit h th e transmis -sion in Par k o r neutral .
I s DT C P010 6 indicated ?
NO
Chec k th e MA P senso r output :
1 . Sto p th e engine .
2. Tur n th e ignitio n switc h O N (II) .3. Chec k th e manifol d absolut e
pressur e wit h th e sca n tool .
Doe s i t indicat e atmospheri c
pressure?
YES
(To pag e 11-70 ) OUTPU
T
VOLTAG E
YES
Chec k fo r vacuu m leakag e
betwee n th e MA P senso r an d
throttl e body .
Is ther e leakage ?NO
Replac e th e MA P sensor .
Check th e MA P senso r output :
1 . Sto p th e engine .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Chec k th e MA P wit h th e sca n
tool.
Replac e th e MA P sensor .Does it indicat e atmospheri cpressure?
YES
(To pag e 11-70 )
YES
NO
ProCarManuals.com
The scan tool indicates Diagnostic Trouble Code (DTC) P1128: Manifold Absolute Pressure (MAP) lower than
expected.
— The MIL has been reported on.
— DTC P1128 is stored.
Problem verification:
1. Turn the ignition switch ON (II).
2. Check the MAP with the scan
tool.
Is 54.1 kPa (406 mmHg, 16.0
in.Hg) or higher indicated?
Intermittent failure, system is OK
at this time.
The scan tool indicates Diagnostic Trouble Code (DTC) P1129: Manifold Absolute Pressure (MAP) higher than
expected.
Is 43.3 kPa (325 mmHg, 12.8
in.Hg) or less indicated?
Intermittent failure, system is OK
at this time.
Replace the MAP sensor.
NO
YES
Problem verification:
1. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on, then
let it idle.
2. Check the MAP with the scan
tool.
— The MIL has been reported on.
— DTC P1129 is stored.
Replace the MAP sensor.
NO
YESProCarManuals.com
PGM-FI System
Secondary Heated Oxygen Sensor (HO2S) (Sensor 2) (cont'd)
Does the voltage stay within
0.3 - 0.6 V for 2 minutes?
NO
Intermittent failure, system is OK
at this time. Check for poor con-
nections or loose wires at C444
(located behind right kick panel),
C610 (secondary HO2S (Sensor
2)) and
PCM.
The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response problem in the Secondary
Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) circuit.
— The MIL has been reported on.
— DTC P0139 is stored.
Problem verification:
1. Do the PCM Reset Procedure.
2. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on.
3. Check the secondary HO2S
(Sensor 2) or output at 3,000
rpm with the scan tool.
Replace the secondary HO2S (Sen-
sor 2).
YESProCarManuals.com