1997 HONDA CR-V Motor ground

Troubleshooting
DTG 54: Main Relay
IWHT/GRNI
AAS CONTROL UNIT 26P CONNECTON
Wire side of female terminals
ABS COf{TROL UN]T 22P CONNECTOR
PCOMIGRN/WHTIscoM{BLK/WHTI
Wire side of female terminals
- With the ignition switch ON(lll, the ABS indicator doesnot go off.- With the SCS service connec-tor connected {see page 19-381,DTC 54 is indicatod.
Check the ABS +B 120 A) fuse inthe under-hood ABS luse/relaybox, and reinstall the fuse if it isoK.
FeDlace the tu3e and recheck.
Ch€ck tor an open in the 81, 82circuit:Measure the voltage betweenbody ground and the ABS controlunit 26P connector terminal No. 14and No. 15 individually.
Repair open in the wiro bstweonth6 ABS conirol unit and theunder-hood ABS fuse/rolay box,
ls there battery voltage?
Check for a short to body groundin the PMR circuit:L Turn the ignition switch OFF.2. Remove the pump motor relay.3. Disconnect the ABS controlunit 22P connector.4. Check lor continuity betweenterminal No. 19 and bodygrouno.
Repair short to body ground inthe wire betweon the under-hood ABS lGe/r.lay box and theABS control unit.
Check for a short to body groundin the PCOM, SCOM cilcuit:1. Disconnect the ABS controlunit 26P connector.2. Check tor continuity betweenbody ground and the ABS con-trol unit 26P terminals No- 1and No.2 individually.
. R€pair short to body ground inth€ P1COM circuit wire betweenthe ABS control unit and theund6r-hood ABS tuse/r6layoox.. R6p.ir short to body ground inthe PCOM or SCOM circuit wirebetweon th6 ABS control unitand lhe mod!lator unit.. R.Dlece tho modulrtor unit.(Short circuit inside the unitl
ls there continuity?
(To page 19-53)
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Troubleshooting
Symptom Ghart
For electrical malfunctions which are indicated by the self-diagnostic system, reter to selt-diagnosjs function (see next
page).
Note these items before troubleshooting a symptom.
. Check the engine coolant level, and allow the engine to warm up before troubleshooting.
. Anv abnormality must be corrected before continuing the test.
. Because of the precise measurements needed, use a digital multimeter with an output of 1 mA or less at the 20 kO
range when testing.
. Before performing any troubleshooting procedures check:
- Fuses No. 47 17.5 AJ, No. 55 (40 A), No. 56 (20 A), No. 57 (20 A) in the under-hood fuse/relay box, and No. 17 {7.5 A) in
the under-dash fuse/relay box.._ Grounds No. G101, G201, G202, G401, G4O2
- Cleanliness and tightness of all connectors
SymptomSse pags
Mode control motor does not run, or one or more modes are inoperative.
Recirculation control door does not change between Fresh and Recirculate.22-24
Radiator fan does not run at all (but condenser fan runs with the AVC on).
Condenser fan does not run at all {but radiator fan runs with the Ay'C on).22-29
Both fans (radiator and condenser) do not run for engine cooling. but they both run with the A,/C
on.
Both fans do not run with the Ay'C on22-33
Compressor clutch does not engage.22-34
AJC svstem does not come on (both fans and compressor).22-37
Both heater and A/C do not work,22-39
22-10
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Troubleshooting
Air Mix Control Motor
Recirculation indicator light indicates Diagnostic Trouble Code (DTC) 1: A problem in the air mix control motor circuit.
The air mix control motor regulates the mixture of cool/hot air according to outputs from the heater control panel.
Selt-diagnosis circuit check indi-cates a Droblem in the air mixcontrol motor circuil.
Chock the air mix control moior:1. Disconnect the air mix controlmotor 5P connector,2, Test the air mix control motor(see page 22-43).
Check the air mix control linkagoand doors:1. Remove the air mix controlmotor (see page 22'43).2. Check the air mix control linkage and doors for smooth
ls the air mix control motor OK?
Do the air mix control linkage anddoors move smoothly?
Reolacelhe air mix conlrol motor.
Check Ior a short in the wires:1- Remove the heater controlpanel (see page 22-46).2. Check tor continuity betweenbody ground and the heatercontrol panel 20P connectorterminals No. 1, 6, 9, 17 and18 individually.
Ropair any short in the wire(s)betwoon th. heater co.rtrol panel
and the air mix conlrol motor.
HEATER CONTROL PANEL 2OP CONNECTOR
PNK/BLK
RED/BLU
Wire side of female terminals
To page 22-13
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Troubleshooting
Blower Motor Speed
Recirculation indicator light indicates Diagnostic Trouble Code (DTC) 2: A problem in the blower motor circuit
The speed of the blower motor is controlled by signals sent from the heater control panel
POWER TRANSISTOR 3P CONNECTOR
1
2)3
f
BLK
Wire side of female terminals
JUMPERWIRE
HEATER CONIROL PANEL 2OP CONNECTORWire side oI fgmale t€rminals
12,/1,/68I10
't112131ia't51611181920
LI GRN/BLK
o
LT GBN/BLK
Blower motol only runs on highspood position; h does not run inany othe. speod positions.
Self-diagnosis circuit check indi-cates a problem in the blowermotor circuit,
Chack lor.n open in the wire:1. Disconnect the power transis-tor 3P connector.2. Check for continuity betweenthe No.3 terminal and bodygro(1nd.
Chock for.n op.n in thc wirobotween ihe powa. transistorrnd body ground, It tho wir. is
OK, check for poor ground atG,O1 .nd G4o2.
ls there continuity?
Chsck for an opon in the wire:'1. Connect the No. 1 and No. 3t€rminals of the power tran-sistor 3P connector with ajumper ware.2. Turn the ignition switch ON {ll).
Repair op6n in the wiro betwoontho Dower transi3tol and theblowor motor.
Check tor an open in tho wire:1. Turn the ignition switch OFF.2. Disconnect the iumper wire.3. Remove the heater controlpanel (see page 22-46).4. Check for continuity botweenthe No. 20 terminal of theheater control panel 20P con-nector and the No.2 terminalof the power transistor 3Pconnectof,
R€pair opon in tho wire betwoenth6 oowor ttan3i3tor and th6hoatar control oanel.
NOTE: lf the blower motor doesrun at all, refer to page 22-16.
10 page 22-15
22-14
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From page 22-14
Chock for a short in the wire:Check tor continuity between theNo. 20 terminal of the heater con'trol panel 20P connector and bodyground,
R.p.ir short in the wire betwoenth. herter control Denel snd theoowor tranSastor.
Check to. an open in the wire:1. Turn the ignition swilch ON (ll).
2. Measure the voltage betweenthe No. I terminal of theheater control panel 8P con-nector and body ground.
Repair opan in the wire betwaentho heatsr cont.ol o.nel and theblower motor.ls there battery voltage?
Chock th6 power iransistor:1. Turn the ignition switch OFF.2. Reconnect the heater controlpanel 8P and 20P connectors.3. Test the power transistor (seepage 22 44).
ls the power transistor OK?
Chec* for loo3e wires or Door oon-neclions at the heater controlpanel 8P and 20P connoctors andat lhe power tran3istor 3P connec-tor. lf lhe connectiorc are good,substituta , known-good hoatercontrcl pan6l, and r€check. ll thesymptom/indication goes away.replecg th6 original heater controloanel.
HEATER CONTROL PANEL 2OP CONNECTOR
2,/1,/l/68910
1112131a151617181920
LT GRN/BLK
o
Wire side of female terminals
HEATER CONTROL PANEL 8P CONNECTOR
BLU/8LK
Wire side of female terminals
1
4678
22-15
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Troubleshooting
Blower Motor
Recirculation indicator light indicates Diagnostic Trouble Code (DTC) 2: A problem in the blower motor circuit.
The speed of the blower motor is controlled by signals sent from the heater control panel,
BLOWER MOTOR 2P CONNECTOR
JUMPEFw|RE
Wire side of lemale terminals
Blower motor do.3 not run at all.
Selt-diagnosis circuit check indi-cates a problem in the blowermotor circuit,
check rhe No. 55 (40 A) {use inthe under-hood fuse/relay box,and the No. 17 (7.5 A) fuse in theunder-dash fuse/relay box.
Replace th6 fuse(s), and rechalck.
Check tho blowe. motor inputand output cilcuh:1. Connect the No. 2 terminal ofthe blower motor 2P connec-tor to body ground with ajumper wrre.2. Turn the ignition switch ON (ll).
Does the blower motor run?
Chock the blower moto.:1. Disconnect the jumper wireand the blower motor 2P con-nector.2. Measure the voltage betweenthe No. l terminal and bodygrou nd.
Check tho blower motor rolay:1. Turn the ignition switch OFF.2. Romove the blower motorrelay from the under-hoodfuse/relay box, and test it (seepage 22 45l'.
fo page 22-11
fo page 22-19
22-16
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From page 22-16
Check lhe blower motor hightelay:1. Turn the ignition switch OFF,and disconnect the ju mper
2. Remove the blower motorhigh relay, and test it {seepage 22-45).
Check for rn opon in the wire:l. Connect the No. 1 terminal ofthe blower motor high relay4P connector to body ground
with a iumper wire.2. Turn the ignition switch ON (ll).
R6pair opcn in the wire botwoenthe blower motor and the blowermotoi high relry.Does the blower motor run?
Check tor an opon in the wire:'1. Turn the ignition switch OFF,and disconnect the iumper
2. Turn the ignition switch ON {ll).3. Meas0re the voltage betweenthe No. 2 terminal of theblower motor high relay 4Pconnector and body ground.
Repair opon in the wiro betweonthe No. 17 fuse and tho blowelmotor high relay.ls there battery voltage?
Check tor an open in the wire:'1. Turn the ignition switch OFF.2. Check lor continuity betweenthe No. 3 terminal ot theblower motor high relay 4Pconnector and body ground.
Check for an open in the wirebetween the blowar motor highrel.y and body ground. lf the wiroi3 OK, check fo. poor ground atG{Ol .nd Gt|()2,
To page 22-18
BLOWER MOTOR HIGH BELAY itP CONNECTOR
BLU/BLK rF r.--1 1 2 )l|_#
.ruuee" I l31i
wrRE I
Wire side of female terminals
(cont'd)
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Rcpbcc tho blower motor rolay.
Ch.ck th. under-hood tu.o/rolaybox:Measur6 the voltage between theNo. 3 terminal ofthe blower motorrelay 4P socket and body ground.
Chack tor an open in the wilo:1. Turn the ignition switch ON (ll).
2. Measure the voltage betweenthe No. 4 terminal of theblower motor relav ,[P socketand body ground.
Ropair opon in the wirs botwoonth. No. 17 fu3o and th. blow6rmotol lolay.ls thore battery voltage?
Chack tor an opon in tho wilo:1. Turn the ignition switch OFF.2. Check for continuity betweenthe No. 2 terminal ot theblower motor relay 4P socketand body ground.
Chock tor !n opan in the wilebstween tha blowar motor ralaY.nd body ground. It tho wilc isOK, chock fol poor ground atG/Ol and G402.
Ropair opon in th. BLU/WHTwira batwaan lho blowor motolrohy and tho blowe. motor.
Frcm page 22-16
BLOWER MOTOR RELAY 4P SOCKET
922-1
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