ecm ACURA INTEGRA 1998 Service Owner's Guide

The MIL has b€en reoorted on.DTC P0117 is stored.
Problem verification:1. Turn the ignition switch ON (ll).2. Check the ECT with the scantool.
Intermittent failure, system is OKat this time. Check for poor con-nections or looso wires at C111(ECT sensorl and ECM.
ls 302'F (150'C) or higher {orH Limit in Honda mode ofPGM Tester) or 0 V indicated?
Check tor a short in tho ECT sen-sor:1. Disconnect the ECT sensor
2. Check the ECT with the scantool.
ls 302'F (150'Ci or higher (orH-Limit in Honda mode olPGM Tester) or 0 V indicated?
Check tor s short in the wires (ECTline):r. r urn Ine rgnrtron swttch uFf,2. Disconnect the ECM connector D (16P).
3. Check lor continuity betweenECT sensor connector termi,nal No. 1 and body ground.
Check tor short in the TCM IECTlinell1, Disconnect the 22P connectorfrom the TCM.2. Check for continuity betweenECT sensor connector terminal No- 2 and body ground.
ls there continuity?
Repair shon in the wire botweenECM lD2). TCM and ECT sensor.
iT,011tl The.scan tool indicates Diagnostic Trouble Code (DTC) P0117:Alowvoltage(hightemperature) probleminthe- Engine Coolant Temperature (ECT) sensor circuit.
ECT SENSOR CONNECTOR IC111}
Wire side of fem6le terminals
Substitute a known-good ECMand recheck. lI normal ECT isindicated, replaco the origindlECM.
(cont'd)
NO
11-61

\
r
I
Ir
PGM.FI
Engine
System
Coolant Temperature (ECTI Sensor (cont'dl
lTo1ig I The.scan tool indicates Diagnostic Trouble Code (DTC) P01 18: A high voltage (low temperature) problem in the.- Engine Coolant Temperature (ECT) sensorcircuit.
ECT SENSOR CONNECTOR (C111)
L
li
li
tllll
tl
fl
ECT{RED/WHT)
sG2{GRN/BLKI
JUMPER WIRE
Wire side o{ lemale terminals
ECM CONNECTOR D {16PI
ECT{RED/WHT)
The MIL has been repo.ted on.DTC P0118 is stor€d.
Problem v€riticetion:1. Turn the ignition switch ON (ll).
2. Check the ECT with the scantool.
Intermittont failure, svstom i3 OKat this time. Check for poor con-noctions or looso wires at C111{ECT sensorl and ECM.
ls -4'F (-20"C) or less (or L-Limitin Honda mode of PGM Tester) or5 V indicated?
Chock tor an opon in the ECT s6n-sor:t. utsconnect tne EL I sensor
2. Install a jumper wire betweenthe two terminals on the harness side of the ECT sensor
3. Check the ECT with the scantool,
ls -4'F (-20"C) or less (or L-Limitin Honda mode of PGM Tested or5 V indicated?
Ch6ck Ior an open in the wiresIECT, SG2lines):1. Turn the ignition switch OFF.2. Install a jumper wire betweenECM conneclor terminals D2and D11.3. Turn the ignition switch ON (ll).4. Check the ECT with the scantool.
ls -4'F {-20'C) or less (or L-Limitin Honda mode ol PGM Tester) or5 V indicated?
Ropair op6n in the wires betwo€nECM lD2, D11) and ECT 3eBor.
Substitute a known-good ECMand recheck. lf normal ECT isindicated, replace the originalECM.
JUMPER WIRE
sG2
r-zlr r5
5e I/ 101t't2
l5
Wire side of female terminals
L

The scan tool indicates Diagnostic Trouble Code (DTC) P0122: A low voltage problem in the Throttle Position{TP) sensor circuil.
The TP Sensor is a potentiometer. lt is connected to the throttle valve shaft. As the throttle position changes, the throttleposition sensor varies the voltage signalto the ECM.
ARUSHHOI.DER
BRUSH 5
FULLTHROTTLE
TP SENSOR CONNECTOR IC115)
Wire side of temale terminals
ECM CONNECTOR D {16P)
(GRN/BLUI
Wire side ot female terminals
sG2 / -\
fr rrr r 'tr\
- 1 2 3)
|{- f- /
| _-,/tlI /6 I TPS-\j/
Terminalside of maletermrnats(To page 11-64)
The MIL has be€n reDort€d on.DTC P0122 is stor€d.
Problem veritication:1. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on, thenturn the ignition switch OFF.2. Turn the ignition switch ON (ll).
3. Check the throttle positionwith the scan tool.
ls there approx. 10% whenthe throttle is fully closedand approx.90o/o when thethrottle is fully opened?
lntermittenl tailure, system is OKat this time. Check tor poor con-nections or loose wires at Cl15{TP s€nsor) end ECM.
Check lor an open in ihe wire(VCC2line):
1. Turn the ignition switch OFF.2. Disconnect the TP sensor con,nector,3. Turn the ignition switch ON (ll).4. Measure voltage betweenTP sensor connector terminalsNo. l and No. 3.
ls there approx. 5 V7
Check fo. an open in wire IVCC2line):lleasure voltage between ECMconnector terminals D10 and D11.
R.p.ir opon in tho wire betwoenECM {D101 and TP sen3or.ls there approx. 5 V?
Substitute a known-good ECMand recheck. lf pr6sc.ibed volt-age ia now available, replaco theoriginalECM.
Check for an open or 3hort in TP3ensor:1. Turn the ignition switch OFF.2. Measure resistance betweenTP sensor terminals No. '1 andNo.2 with the throttle fullyctoseo,
OUTPUT VOLTAGE {V)
4
RESISTOR3
2
TERMINAL
I
o
THROTTLEOPEI{INGBUS}IINGIDLE
sG2{GRN/BLK)vcc2IYEL/BLU}
vcc2{YEL/BI
l\e
4E
i2iRN,
. llLI5
6/101t 12
t515
(cont'd)

I
PGM-FI System
Terminal side ot male terminals
ECM CONNECTOR D {16P}
TPSIREO/BLK)tr:l
sG2
rlzlr rl
6,?1otl12
13 tat5l5
{GRN/BLU)
Wire side of female terminals
L
ls there approx. 0.5 - 0.9 kO?
Check Ior an open or short in theTP sensor:Measure resistance between TPsensor terminals No. 2 and No. 3with the throttle fully closed.
ls there approx.4.5 k0?
Check lor an open in the ECM:1. Reconnect the TP sensor con-nector.2. Turn the ignition switch ON {lli.3. Measure voltage beween ECMconnector terminals D1 andD11.
ls there approx.0.5V when thethrottle is fully closed andapprox. 4.5 V when the throttleis fully opened?
Substitute a known-good ECMand .echeck. It olescribed volt-age is now available, .oplace theo.iginal ECM.
Check tor shon in the TCM:1. Turn the ignition switch OFF.2. Disconnect the 22P connectorfrom the TCM.3. Turn the ignition switch ON lll).4. Measure voltage between ECMcon nector terminals D1 andD11.
ls there approx.0.5 V when thethrottle is fully closed andapprox. 4.5 V when the throttleis fully opened?
Repeir short in the wire betweonECM {D11, TCM and TP sensor.
(From page 11-63)
(A/T only)L 'A'"fll I

The scan tool indicates Diagnostic Trouble Code (DTC) P0123r A high voltage problem in the Throttle position(TP) sensor circuit,
TP SENSOR CONNECTOR {Cl15I
sG2{GRN/BLK}(YEL/BLU)
Wire side of female terminals
Th€ MIL has been reported on.DTC P0123 is stored.
Problem veriticationl1. Start the engine. Hold theengine at 3,000 rpm whh noload (in Park or neutral) untilthe radiator tan comes on, thenturn the ignition swhch OFF.2. Turn the ignition switch ON (ll).3. Check the throttle positionwith the scan tool.
ls there approx. l0% whenthe throttle is fullyclosedand approx. 90% when thethrottle is fully opened?
Intermittoni {ailure, system is OKal this time. Check tor poor con-nections or loose wires at C115{TP sensor} and ECM.
Check for an open in the TP sen-sot:1. Turn the ignition switch OFF.2. Disconnect the TP sensor con,nectot.3. Turn the ignition switch ON (ll).4. Measure voltage between TPsensor connector terminalsNo.3 and No.'1.
ls there approx. 5 V?
Check for an open in th€ wire(SG2linel:
Measure voltage between ECMconnector terminals Dl0 and 011.
Ropair open in the wir6 betweenECM lD11l and TP sensor.ls there approx. 5 V)
Substitute a known-9ood ECMand rocheck. lf prescribed volt-age is now availablo, roplace theoriginal ECM.
ECM CONNECTOR D I16PI
Wire side of female terminals
(cont'di
1 1-65

Primary Heated Oxygen Sensor (HO2S) lsensor 1l
The Heated Oxygen Sensor {HO2S) detects the oxygen content in the exhaust gas and signals the ECM. In operation, theECM receives the signals from the sensor and varies the duration during which fuel is iniected. To stabilize the sensor,soutput, the sensor has an internal heater and the sensor element is coated with a catalyst. The HO2S is installed in TWChousing (818C'1, 818C5 engines) or exhaust pipe B {81881 engine).
ztFcoNtAEI."EMEI'IT
SENSORTERMINALVOLTAGE IV)
HEATERIIEATERTERMINAL
RICH. AIR. * LEANFUELRANO
Thescantool indicates Diagnostic Trouble Code IDTCI PO13l: A low voltage problem in the primary
Heated Oxygen Sensor (HO2S) (Sensor 1) circuit.
- Th6 MIL h.r baan.ago.t.d on.- DTC m131 it 3to..d.
Problcm vcrificrtion:1. Do the ECM Reset Procedure.2. Start the engino. Hold theengane at 3,000 rpm with noload lin Park or neutral) untilth€ radiator Ian cofies on.3. Test-drive with the A,/T in Eposition, M/T in 4th gear.4. Check the Primary flO2S {S€n-sor 1) output voltage with thescan tool during accelerationusing wide open throttle.
Intarmittcnt f.ilur., 3yatam b OK.t thia tima. Ch.ck for poor con.nrctiona or loosa wiraa at C113(Prim.ry HO2S ls.n.or lll rndECM.
Chock the fuel pres6ure (see psge11-'t 18).
{To page 11-68)
(cont'd)
11-67

I
PGM.FI
Primary
System
Heated Oxygen Sensor (HO2S) (Sensor 1l(cont'dl
PRIMARY HO2S {Sensor'l} CONNECTOR (C1131
PHO2S T--rwHTl - --l
.l1 2ll1-{
0tls rl
Y,-I
Wire side of female terminals
Does it stay at 0.1 V or less?
Check lor a short in the wires:1. Turn the ignition switch OFF.2. Disconnect the ECM connector D (16P).
3. Check for continuity betweenHO2S connector terminal No. 1and body ground.
1 1-68
Check ror a short in the HO2S:1- Turn the ignition swilch OFF.2. Disconnect the Primary HO2S(Sensor 1) connector.3. Stan the engine and let it ;dle.4. Check the Primary HO2S (Sen
sor 1) output vohage with the
(From page '11 67i
Subslitute a known-good ECMand recheck. lf symptom/indica-tion goes away, replace lhe origi-nal ECM.

JThe scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage probtem in the primary HeatedOxygen Sensor (HO2S) (Sensor 1) circuit.
Problem veritication:1. Do th; ECM Reset procedure.
2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Test-drive with the A/T in Elposition, M/T in 4th gear.4. Check the Primary l-lO2S (Sen-sor 1) outprrt voltage with thescan tool during decelerationusrng comptetely closed throt-tle.
YES
Check tor an open in the HO2S:1. Turn the ignition switch OFF.2. Disconnectthe Primary HO2S(Sensorl)connector.
lnstall a jumper wire on the harness side ofthe Primary HO2S(Sensor 1) connector betweenterminals No.1 and No.2.Turn the ignition switch ON t).Check the Prjmary HO2S (Sen-sor'l) output voltage with thescan tool.
Intermittent failur€, svstem is OKat this time. Check for poor con-nectaons or loose wires at C113(Primary HO2S lsensor lll andECM.
5.
PRIMAnY HO2S {Sensor 1) CONNECTOR tC1t3l
PHO2S(WHT}
Wire side of female terminals
ECM CONNECTOR D (16PI
JUMPERWIREPHO2S(WHT)F;r=12 3 !l
sG2
5
./ 1012
13
(GBN/BLU)
Wire side of female terminals
(cont'd )
- The MIL has b€€n ieDorted on.- DTC P0132 isstored.
Replace the Primary HO2S (Sen-sor 11.ls there 1,0 V or more?
Check for an open in the wiros{PHO2S lin6):1. Turn the ignition switch OFF.2. Connect ECM connector termi-nals D7 and Dl1 with a jumper
3. Turn the ignition switch ON 0).4. Checkthe Primary HO2S (Sen-sor 1) output voltage with thescantool.
Repair open in the wire betweenECM (D7) end Primarv HO2S lsen-sor l).
ls there 1,0 V or more?
Substitute a known-good ECMand recheck. lf symptom/indica-tion goesaway. r€place th€ origi-nalECM.
1 1-69

PGM-FI System
Primary,Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'dl
The scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary
Heated Oxygen Sensor (HO25) (Sensor 1) circuit.
Description
By controlling the airlfuel ratio with a Primary HO2S (Sensor 'l) and a Secondary HO2S (Sensor 2), the deterioration of the
primary HO2S {Sensor 1) can be evaluated by its teedback period. When the feedback period of the HO2S exceeds a cer-
lain value during stable driving conditions, the sensor will be judged as deteriorated.
When deterioration has been detected during two consecutive trips, the MIL comes on and DTC P0133 will be stored
NOTE: ll DTC P013't, P0132 and/or P0'135 are stored at the same time as DTC P0133, troubleshoot those DTCS first, then
troubleshoot DTC P0133.
Possible Cause
. Primary HO2S (sensor 1) Deterioration
o Primary HO2S Heater (sensor 1) Deterioration
. Exhaust system leakage
Troubl€shooting Flowchart
')
litll r
- Tho MIL has boon raDortcd on.- DTC P0133 is storcd.
Problem verificttion:1. Do the ECM Reset Procedure.2. Start the engine. Hold thoengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.3. Connect the SCS service con-
4. Test'drive Lrnder f o llowingconditions.* 55 mph (89 km/h) steadyspeed- NT in E position, M/T in5th gear- Until readiness code com€son
lnt.flnittcnt ftilu... ay3tam ia OKat thb tiinr. Ch.ck fo. poor con-necliona o. looaa wita! al Cll3
lPrim.ry HO2S lscn.or lll lndECM.
ls DTC P0133 indicated?
Roplacs the Primary HO2S lscn-3or 1),

Secondary Heated Oxygen Sensor (HO2S) {sensor 2l
The scan tool indicates Diagnostic Trouble Code (DTC) P0137: A low voltage problem in the SecondaryHeated Oxygen Sensor (H02S) (Sensor 2) circuit.
(cont'd)
The MIL ha3 been reDorted on.DTC P0137 is storod.
Problem veritication:1. Do the ECM Reset Procedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Check the Secondary H02S(Sensor 2) output voltage at3,000 rpm with the scan 1ool.
Inte.mittent failure, system is OKat lhb time. Ch6ck Ior ooor con-nections or loose wires at C451lSeconddry HO2S {Sensor 2)l andECM.
Does the voltage stay at 0.3 Vor less?
Check for a short in th€ HO2S:1. Turn the ignition switch OFF.2. Discon nect the SecondaryHO2S (Sensor 2) connector.3. Start the engine.4. Check the Secondary H02S(Sensor 2) output whh the scantool.
Does the voltage stay at 0.3 Vor less?
Check tor a short in the wire{SHO2S line):r. I urn rne rgnt on swttch uFF,2. Disconnect the ECM connec,tor D 116P).3. Check for continuity betweenNo. '1 terminal on the Secon-dary HO2S {Sensor 2) connector and body ground.
Ropair short in tho wira bctweenECM (D14) and Secondrry HO2S{Senso.2).
ls there continuity?
Substitute a known-good ECMand recheck. It symptom/indice-taon goes away, replace the origi-nel ECM.
SECONDARYHO2S (Sensor 2l CONNECTOR C451
sHo2sIBLU/REDI f- --
T-l 1 2ltr11(Or ls rl
L
Wire side oI fernale terminals
11-71