1997 HONDA CR-V Body ground

PGM-FI System
Tho Maltunction Indicator Lamo(MlL) n6Yor como3 on leven lortwo laconds) rft6r tho ignhion isturnod ON {lll.
Turn th6 ignition switch ON (ll).
- Repair lhort or opcn in thowire between the No. 25METER 17.5 Al fu3e snd thegauge assembly.- Repl.co the No. 25 METER17.5 Al fus€.
ls the low oil pressure light on?
Try to start the engine.
Chock for an opsn in th€ wiro orbulb {MlL line,:1. Turn the ignition switch OFF.2. Connect the ECM/PCM con-nector terminal A18 to bodyground with a iumper wire.3. Turn the ignition switch ON (ll).
Rep.ir open in the wi.osbotween the ECM/FCM lA18land the gaugo rasombly.Roplece the MIL bulb.
ls th6 MIL on?
Substitute a known-good ECM/PCM and rochock. lf rymptom/indication goes eway, replacetho o gind ECM/PCM.
Turn the ignition switch OFF.Inspect the Fl E/M 115 A) tusein the undeFhood fuse/relaybox.
- Repair short in the wirebetween lhe Fl E/M (15 AlfusG and the PGM-Fl m.in.slay.- Roplsce th€ Fl E/M (15 Alfu3€.
Inspect the No. 13 FUEL PUMP(15 A) fuse in the under-dashfuse/relay box.
- Repair short in th6 wirebetween tho No. 13 FUELPUMP 115 A) luse and thePGM-FI main .elay.- ReDlace tho No. 13 FUELPUMP 115 Al tuse.
Engine Gontrol Module/Powertrain Control Module (ECM/PCM) -'98 - 00 Models
NOTE:. lf this symptom is intermittent, check tor:- A loose Fl E/M {15 A) fuse in the under-hood fuse/relay box- A loose No. 25 METER {7.5 A) fuse in the under-dash fuse/relay box- A loose No. 13 FUEL PUMP (15 Alfuse in the underdash fuse/rolay box- An intermiftent short in the wire between the ECM/PCM (A18) and the gauge assem-
- An int€rmiftent short in the wire between the ECM/PCM (C19) and the MAP sensor- An intermiftent short in the wire between rhe ECM/PCM (C28), the TP sensor, theEGR valve lift sensor and/or {uel tank Dressure sensor- A laulty PGM-FI main relay
ECM/PCM CONNECTOR A (32P}
Wire side of female terminals
(To page 11-871
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Ch€ck tor rn opon in tha wiioa(lGP lino.):1. Disconnectthe fuel inj€ctor andIAC valve connectors.2. Turn the ignition switch ON {ll}.3. Measure voltage betweenbody ground and ECM/PCMconn€ctor terminals B'l and89 individually.
- Repaii opon in th6 wirc{3lbetw.6n tho ECM/PCM (B1.
Bgl lnd tho PGM-FI mainroby.- Chock for poor connactionsor loo3€ wiJo3 at the PGM-FImain ralry.- T.st the PGM-FI mtin r.lay(soo p.ge 11-1871.
ls there battery voltage?
Chack for an opon in tho wire3
{PG, LG lino3l:1. Reconnect the luel iniectorand IAC valve connectors.2. Measure voltage betweenbody ground and ECM/PCMconnector terminals 82, 810,820 and 822 individually.
B.pair open in the wiroltlb.twocn tho ECM/PCM .ndG101 lloc.t6d rt th. thormoiathouingl that had mo.e than 1 .0 V.
lsthere lessthan 1.0 V?
Chock for a shon in the wira3
{VCCI, VCC2 lin..l:Measure voltage between bodyground and ECM/PCN4 connectorterminals C19 and C28 individuallv.Chock lor a short in r s€nsor:While measuring voltagebetwoen body ground and ECM/PCM connector terminals C19and C28 individually, disconneclthe 3P connector ol each sensorone at time:
. TP sensor. Fueltank pressure sensor
ls there approx.5 V?
Rooair ahort in tho wire b€twoentho MAP sen3or. TP sensor, Fuel
tank Dreaaure Sonsor and theECM/PCM tC19, C28).
ls there approx. 5 V?
Sub3lhuio . known-good ECM/PCM .nd rcch6ck. lf tymptom/indic.tion go.3 away, rapl.ceth. original ECM/PCM.Replece the ronsor thtt hadapprox. 5 V.
(From page 11-86)
lcont'd)
r
28
I1011't317
19202123
vXv) iiP2rELlBLK)
IGPl(YEL/BLK)
ECM/FCM CONNECTOR A {25PI
Wire side of lemale terminals
(YEL/RED)
Wire side oflemale terminals
ECM/PCM CONNECTOR C {3'IP}
| 2i37Es/'t61718 192021\22
26272elE30 31
vcc2(YEL/BLUIktvccl
11-47
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PGM-FI System
Engine Control Module/Poweftrain Control Module (ECM/PCM) -'98 - 00 Models (cont'dl
NOTE:. When there is no Diagnostic Trouble Code IDTC) stored, the MIL will stay on iI the SCSservice connector is connected and the ignition switch is ON (ll).. lf this symptom is intermittent, check for:- An intermittent short in the wire between the ECM/PCM (A10) and the service checkconnoctor- An intermittent short in the wire between the ECM/PCM (At8l and the gaugeassemDty. See the OgD ll scan tool or Honda PGM Tester user's manuals for specific operatingrnstructions.
ECM/FCM CONNECTOF A {32P)
Wire side of femsle t6rminals
The Malfunction lndicator LamolMlll 3lays on or comes on aftertwo 3econds.
Check the Dirgnostic TroubloCod€ (DTCI:'1. Connect a scan tool or HondaPGM Tester.2. Turn the ignition switch ON (ll).3. Read the DTC with the scantool or Honda PGM Tester.
Go to troublGhooting procadura.(3€c prg€ l lS0l
check tho DTc by MIL indication:1. Turn the ignition switch OFF.2. Connect the SCS service con-nector to the service checkconnector,3. Turn the ignition switch ON (ll).
Ropair op.n ol Bhort in wirob.twe.n thc ECM/FCtrl (A21)
and D.i. Link Connoctor.Go to troublo3hootlng proc€-dur6. lt o pag. 11.6lrl
Does the MIL indicate any DTC?
Try to start the engine.
Sub3titute r known"good ECM/PCM .nd roch.ck. lt .ymptom/indic.tion gooa awsy, repl.cothe origin.l ECM/PCM.
Does the engine stan?
Check tor a 3hort in the wireISCS linel:1. Turn the ignition switch OFFand turn the ignition switchoN { ).2- Measure voltage betweenbody ground and the ECM/PCi, conneclor terminal A10.
Ropria ahort to body ground intho wi.c Mwe.n tho ECM/PCMlA10l and aarvic. check connsc-tor.
lTo page 1l-89)
11-88
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Check tor a short in the wire (MlL
linel:1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM connector A (32P).
3. Turn the ignition switch ON (lli.
Repair short to body ground in
the wire b€twe.n the ECM/PCM
lA18) and tho MlL.
Substituto a known-good ECM/PCM .nd recheck. lf symptom/indication goo3 .way, replaceth€ original ECM/PCM.
(From page 11-88)
1-89
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{From page 11-90)
Chock tor .n open or short in the
MAP 3€n30r:Check the MAP with the scan
tool.
ls approx. 2 kPa (15 mmHg,
0.6 in.Hg),0.1 V or less indi-
cated?
Chock for a lhort in the wire(MAP linol:1. Turn the ignition switch OFF.
2. Disconnect the ECM/PCMconnector D (16P), (C 131P))*.3. Check for continuity betweenthe MAP sensor connector No.3
terminal and body ground.
R€p.ir 3hort in the wire bstwcen
tho ECM/PCM (D3, C17') rnd tho
MAP 3rnsoi.
Sub3lilut. . known-good ECM/
PCM and rocheck. lf normal MAP
k indic.tcd, r.pl.co thc originrlECM/PCM.
MAP SENSOR 3P CONNECTOR (C131I
Wire side of lgmale terminals
(cont'd)
1 1-91
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PGM-FI System
Intake Air Temperature (lAT) Sensor (cont'dl
The scan tool indicates Diagnostic Trouble code (DTC) P0112: A low voltage (high temperature) problem in theIntake Air Temperature 0AT) sensor circuit.
The IAT Sensor is a temperature dependant resistor (thermistor). The resistance of tho thermistor decreases as the intakeair temperature increases as shown below.
RESISTANCE IKO)
i')
)2 /
A tAr
9) (RED/YEU
-L
-. 32 aa rorr 1?a 2ra 2aa f.el-m 0 20 rto ao i0 too l2ofcl
INTAKE AIR TEMPERATUR€
It the engine is warm, it will b€ high-er than ambient temperature.
IAT SENSOR 2P CONNCCTOR (C'33I
- The MIL has been reDoned on.- OTC m112 is stored,- Or from Probable Caus€ List.
Problem vsrification:1. Turn the ignition switch ON flt).2. Check the IAT with the scantool.
ls 302'F (150'C) or higher (orH-Limit in Honda mode ofPGM Testeri or 0 V indicated?
ls the correct ambient temper-ature indicated,,?Beploce tho IAT sensor.
Intermittent failure, system i3 OKat this time. Ch6ck for poor con-nectiona o. loose wires rt C133{lAT s€nsorl and rt th6 ECM/pCtr4.Check for a short in the IAT sen-sot:1. Disconnect the IAT sensor 2p
2. Check the IAT with the scantool.
ls 302"F {150"C) or higher {orH-Limit in Honda mode ofPGM Tester) or 0 V indicated?Raplace the lAT aensor.
Ch€ck for a short in the wir6 llAtlinel:1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector {D (16P}, C (31P)').3. Check for continuity betweenthe IAT sensor 2P connector terminalNo.2 and body ground.
Repair short in the wi.o botweenth6 ECM/rcM {D8, C25*l and th6IAT 3ensor.
Substitute a known-good ECM/PCM and recheck. lf normel IATis indicaled, replace the originalECM/PCM,
*: '98 - 00 models
1 1-96
Wi16 side of femsle terminals
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PGM-FI System
Engine Coolant Temperature (ECTI Sensor {cont'd)
[F011' The.scan tool indicates Diagnostic Trouble Code (DTC) P0117: A low voltage (high temperature) problem in the: Engine Coolant Temperature (ECT) sensor circuit.
ECT SENSOR 2P CONNECTOR {C114I
Wire side of female terminals
- The MIL has been rooortod on.- DTC ml17 is sto.od.
Problem verification:1. Turn the ignition switch ON {ll).2. Check the ECT with the scantool,
Intermittont f.ilure, sysiom is OKat thk time. Check for poor con-nections or loo3e wire3 at C1lil(ECT sensorl and et the ECM/PCM.
ls 302"F (150'C) or higher (or
H Limit in Honda mode otPGM Tester) or 0 V indicated?
Check for a Bhort in the ECT sen-301:'1. Disconnect the ECT sensor 2Pconnefior,2. Check the ECT with the scantool.
ls 302"F (150"C)or higher (or
H-Limit in Honda mode ofPGM Tester) or 0 V indicated?
Check for r shorl in the wirs(EgT linel:1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector D (16P), (C (31P)*1.3. Check tor continuity betweenthe ECT sensor 2P connectorterminal No. 1 and bodyground.
Repair short in the wir€ betweenthe ECM/FCM (D2, C26rl ,nd th6ECT senaor.
ls there continuity?
Substitute a known-good ECM/PCM and recheck. It normal ECTi! indicatod, replaco the oiiginalECM/PCM.
*:'98 - 00 models
1-1
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{From page 11-110}
Check tor a shorl in the HO2S:1. Turn the ignition switch OFF.2. Disconnect the Primary HO2S(Sensor'1i 4P connector.3. Start the engine and let it idle.4. Check the Primary HO2S(Sensor 1)output voltage withthe scan tool.
Replace the HO2S {Sensor 1).Does it stay at 0.1 V or less?
Check for a short in the wir€(PH02S linel:1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM con-nector (D (16P), C (31P)*).
3. Check tor continuity betweenthe Primary HO2S {Sensor 1)4P connector terminal No. 1and body ground.
Repair short in tho wire botwesnthe ECM/PCM lD7, C16*) .nd th6Prim.ry HO2S (S€nsor 11.
Substituto a known-good ECM/PCM and recheck. ll 3ympiom/indication goes away. raplace th.origin.l ECM/PCM.
PRIMARY HO2S ls.n.or 'l I 4P CONNECTOR (Cl111
PHO2S ---'trwHTr T-T-l
T-1 1 2l
6tlr rlY r___J_J
L
Wire side of temale terminals
(cont'd)
11-111
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