1997 HONDA CR-V voltage

ABS CONTROL UNIT 22P CONNECIOR
Wire side ol lemale terminals
TerminalnumDerWirecolorTerminal 3i9nTerminal nameDescription
Voltage
Conditions(lgnition Switch ON (ll)lOutput voltagetominals
1RED/BLUFR-IN(Front-right
inlet)
Drives right-front inletsolenoid valve.
1-GND.9otur
ONIONOV
OFFAC:3-6V
OFF
lconnect the SCS servicel
connedor lApprox.3 V
BRN(Service checksignal)
Detects service check signal(Diagnostic trouble codeindication)4.GND
SCS service connectorconnected.OV
SCS service connectordisconnected.Approx. S V
7BLU/RED(Warning
ramp)
Drives ABS indicator {The indi-
cator goes off when ABS con-
trol unit outputs battery volt-age).
7.GND
lndicator ONApprox. 2 V
lndicator OFFBattery Voltage
10YEUBLKFL-OUT(Frontieft
outlet)
Drives left-front outletsolenoid valve.1O-GNDON
=
I
ONOV
OFFAC:3-6V
l'lRED/BLKFL-IN(Front-left inlet)
Drives left-front inlet solenoid11-GNDOFF
lconnect the SCS servicq connector lApprox.3 V
YEUBLUFR-OUT(Front-right
outlet)
Drives right-front outletsolenoid valve.12-GND
14LT BLU(Data linkconnectod
Communicates with HondaPGM Tester.14-GNDApprox. 5 V
17BRN/YELMCK(Motor check)
Detects PumP motor drivesignal.17-GNDPumpmotorrelay
ONBattery Vollage
OFFOV
19YEUREDPMR(Pump motorreray,
Drives pump motor relay.
19.GNDcl)
ON6IONOV
OFFAC:3-6V
OFFponnecl the SCS service]
connector IApprox.3 V
BLURR-OUT(Rear-right
outlet)
Drives right-rear outletsolenoid valve.
21.GND'a)
ONPumpmororrcray
ONOV
OFFAC:3 6V
OFF
lconnect the SCS service] connector lApprox.3 V
BLKGND2(Ground 2)Ground for the ABS controlunit.22.GNDBelow 0.3 V
19-35
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Troubleshooting Precautions
ABS lndicalor
1 lf the system is oK, the ABS indicator goes off two seconds after turning the ignition switch oN 1l) wathout staningthe engine, and then comes on again and goes off after two seconds. This occurs because the ABS control unit isturned on by the lG2 power source.2. The ABS indicator comes on when the ABS control unit detects a problem in the system. However, even thouoh thesystem is operating properly, the ABs indicator will come on too, under the following conditions:. Signal disturbance
. Wheel spin
. Only drive wheels rotate. Battery voltage fluctuates
To determine the actual cause of the problem, question the customer about the problem, taking these conditions intoconsideration:
3 When a problem is detected and the ABS indicator comes on, the indicator can stay on until the ignition switch isturned OFF, or it can automatically go off, depending on the mode.. Indicator stays on untilthe ignition switch is turned off: When the system is in the system down mode.. Indicator automatically goes off: When the system is in the control inhibition mode.4 The ABS indicator stays on when the system is reactivated without erasing the DTC, but it goes off after starting thevehicle.
When the wheel sensor system is faulty and the ABS indicator comes on. the algorithm of the system automatically turnsoff the ABS indicator after the wheel speed signal returns to the normal speed. Also, when the DTc is erased, the cpu isreset and the ABS indicator goes off when the system checked out normal by the initial diagnosis.Therefore, test-drive the vehicle after servicing the wheel sensor system. and be sure that the ABS indicator does notcome on.
5 When the ABS control unit outputs battery voltage to the gauge assembly, the ABS indicator ooes off.
Diagnostic Trouble Code (DTCI
1. The diagnostic trouble code (DTc) is memorized when a problem is detected and the ABS indicator does not go off,or when the ABS indicator comes on.The DTc is not memorized when the ABS indicator comes on unress the cpu is activated,2 The memory can hold any number of DTCs. However, when the same DTc is detected twice or more, the tater one iswritten over the old one.
Therefore, when the same problem is detected repeatedly, it is recorded as one DTC.3. The DTCs are indicated in the order of ascending number, not in the order they occur.4. The DTCS are memorized in the EEPROM (non-volatile memorv).Therefore, the memorized DTcs cannot be canceled by disconnecting the battery. perform the specified procedures toerase the DTCS.
Self-diagnosis
1. Self-diagnosis can be classified into these four categories:' Initial diagnosis: Performed right after the eng ine starts and untir theABS indicator goes off.. Except ABS control: Performed when the ABS is not functioning.. During ABS control: Performed when the ABS is functioning.. During warning: Performed when the ABS indicator is ON.2. The system performs the fo|owing contrors when a probrem is detected by the serf-diagnosis:. ABS indicator ON. Memorv of DTC. Mode changetothe "system down mode,, or the ,,control inhibition mode,,.
MODEABS INDICATORMAIN
RELAY
SOLENOID
VALVECPURestart conditionDTC
SYSTEM
DOWNONNo
operation
Drive
inhibitionOperation*rlgnition
switchoFF - ON l)Memory
CONTROL
INHIBITIONONNo
operal|on
Drive
inhibitionOperationAutomaticlMemory
*1: Except CPU failure
19-36
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Diagnostic Trouble Code (DTC)
Troubleshooting Index
This operation can also be done with the Honda pGM Teste..
*: lf DTcs 11-18 {wheel sensor codes) were detected the last time the vehicle was driven, the ABs indicator wi

stav onuntil the ignition switch is turned ON (ll), and the control unit confirms that the wheel sensors are OK,
19-40
DTC3R DIAGNOSIS/SYMPTOM
DETECTION TIMING
PROBLEM
LOCATION
REFER
TO
PAGE
Io
<=EXzd
8 EE
93gl (J
4,,to 2Ee2
B8
2=
ET63
No
DTC
OFFABS indicator does not come on.19,4'l
ONABS indicator does not go off. (No DTC)19-43't1
oN*Wheel sensor {open/short to body ground/short topower)oooo
FR
19-45
13FL't5RR
17RL
12
oN*Wheel sensor/Pulser (chipped pulser gearlelectrical
notse,ooo
FR
19-45
't4FL
RR
18RL
31
ONSolenoid (open/short to body ground/short topower/stuck)ooo
FR-IN
19-47
32FR-OUT
FL.IN
34FL-OUT
RB-IN
36RR-OUT
37RL-IN
38RL.OUT
ONMotor lockoo19-49
ONMotor stuck OFFoo19-49
53ONMotor stuck ONo19-49
54ONMain relay stuck OFFoooia_at
6lONlgnition voltage (low voltage/high voltage)oooo'19-54
81ONoooo19-55
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Troubleshooting
ABS lndicator Does Not Come On
The ABS indicator does notcome on when ignition switch isturnod ON lll).
check the METER {7.5 A} fuse inthe underCash fuse/relay box,and reinstaltthe fuse if it is OK.
Check for an open in the lcl ch-cuil:1. Disconnect the gauge assem-bly 5P connector.2. Turn the ignition switch ON (ll).
3. Measure the voltage betweenthe gauge assembly 5P con-nector terminal No. 5 andbody ground.
. Repair open in the wire betweenlhe METER {7.5 A) luse and thogauge assembly.. Reolece the under-dash fuse/relay box. (Opon circuit insidethe box.)
ls there battery voltage?
Check the ABS indicator bulb inthe gauge assembly.
Replace the ABS indicator bulb.
Check for a short to power in theWALP circuit:Measure the voltage between thegauge assembly 5P connectorterminal No. 1 and body ground.
Sepair short to power in the witeb€tween the gaug€ assemblyand the ABS control unil.ls there battery voltageT
Reolace the tuse and recheck.
(To page 19 42)
GAUGE ASSEMBLY 5P CONNECTOR
Wire side of female terminals
(cont'd)
19-41
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- With engine running, the ABSindicsior is ON.- With the SCS service connec-tor conn€cted (s€€ page 19381,no DTC is indicated.
Check the ABS {7.5 A) fuse in theundeFdash fuse/relay box, andreinstall the fuse if it is OK.
ReDlace lhe tuse and recheck.
Check the ABS +B (20 A) fuse inthe underhood ABS fuse/relaybox, and reinstall the fuse if it isoK.
Replace the fuse and rocheck.
Check for sn open in the lG2 cir-cuit:1. Turn the ignition switch ON {ll).2. Measure the voltage betweenthe ABS control unit 26P con-nector terminal No. 3 andbody ground.
Repair open in tho wire betweenthe ABS {7.5 A} fu3e .nd the ABScontrol unit,
Check for an open in the 81 and82 circuit:Measure the voltage betweenbody ground and terminals No. 14and No. 15 individually.
Ropair open in tho wi.e betweenrhe ABS +B {20 A) fuse and theABS control unit.is there battery voltage?
ABS Indicator Does Not Go Off (No DTGI
A8S CONTROL UNIT 26P CONNECTOR
IG2IBLK/BLU)
Wire side of female terminals
ABS CONTROL U N 26P CONf{ECTOR
{WHT/GRNI
(cont'd)
Wire side of female terminals
(To page 19 44)
19-43
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Troubleshooting
ABS Indicator Does Not Go Off (No DTC) (cont'dl
ABS CONTROL UNIT 22P CONNECTOR
WALP {BLU/REDI
Wire side of female terminals
JUMPCRWIREGND2IBLKI
GAUGE ASSEMBLY 5P CONNECTOF
(From page 19,43)
Check tor a short to body groundin the WALP circuil:1. Turn the ignition switch OFF.2. Disconnect the ABS controlunit 22P and gauge assembly5P connectors.3. Check lor continuity betweenthe ABS control unit 22P con-nector terminal No. 7 andbody ground.
Repair short to body ground inthe wire between the ABS con-t.ol unh and the gauge assembly.
Check the ABS control unit:1. Connect the ABS control unit22P connector.2. Turn the ignition switch ON (ll).3. Measure the voltage betweenthe ABS control unit 22P con-nector terminal No. 7 andbody ground.Check tor an open in the GND2circuit:1. Connect the ABS control unit26P connecto. terminal No. 16to body ground with a jumper
2. Measure the voltage betweenthe ABS control unit 22P con-nector terminal No. 7 andbody ground.
ls there battery voltage?
. Repeir op6n in th6 wire ttetweenthe ABS control unit and bodyground.. Rep.ir poor ground {G401,G4021.
Check lor loose ABS control unhconnectors. lf necesssry, substi-tuie e lnown-good ABS controlunit and recheck.Check tor an open in the WALPcircuit:Measure the voltage between thegauge assembly 5P connectorterminal No. 1 and body ground.
Repair op6n in the wi.e botw€enthe ABS control unit and th€gau9e ass€mbly.
ls there battery voltage?
Replaco the ABS indicator drivecircuit in the gauge assembly.
ABS CONTROL UNIT 26P CONNECTOR
Wire sade of female terminals
WALP IBLU/FEDI
19-44
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- With ths ignition switch ONllll, the ABS indicatol doesnot go ott.- Atte. driving, the ABS indica-lot comas on.- With the SCS service connec-tor connocted (s€€ page 19.381,DTGr 11 - 18 sre indbated.
Check the whcol sensor circuit:1. Disconnect the ABS controlunit 26P connector.2, Nleasure the resistancebetween the appropriate wheelsensor l0) and 1'l) circuit termi-nals {see table).
. Ropair op€n in th. {01 o. lll cir-cuit wire, oa short to the (01 cir-cuit wire in the lll circuit wirobetweon the ABS control unitand th. appropriate whasl sen-sot.. Roplace the rpp.opriatc whe6lSensor.
ls the resistance OK?
/Fronr:750 - r,050 o (20"C,68"F\
\Rear: 950 -'1,450 O (20"C, 68'F,
Chock lor a short 10 power in thewheel sensoa ciacuil:1. Reconnect the ABS control unit26P connector.2. Start the engine.3. Measure the voltage betlveenthe ABS control unit 26P con-nector appropriate wheel sen-sor (0) circuit terminal andbody ground (see table).
Ropair lhort to pow.r in the l0lot 11) circuit wiro between theABS control unit and the appro-priate whool sen6or.
ls there 4 V or more?
Check for a short to body groundin the whoal s.n3or cilcuit:1. Disconnect the ABS controlunit 26P connector.2. Check lor cont;nuity betweenthe ABS control unit 26P con-nector appropriate wheel sen-sor {0) circuit terminal andbody ground {se6 table).. Ropair short to body g.ound inth6 {01 or {1} circuit wirebotweon th6 ABS cont.ol unitand tho appropriato wheol son-aot.. Roplace tho appropriate wheelsensot.
DTC 11 - 18: Wheel Sensor
NOTE: The ABS indicator comes on only when the drive wheels are turning and signal disturbance is detected, Therefore, test-drive the car at a speed of 12 mph (20 km/h) or more after turning the ignition switch from OFF to ON l), and if the ABS indica-tor does not come on, the svstem is OK.
RLl (LT BLUI FRl IGRN/BLKI
Wire side of female terminals
NOTE: Judgement value for short
NO
NOTE:. Normalvoltage: Approx. 2 V.0 V: Replace the ABS control unit.. 4 V or more indicates a shon to power.
NO(cont'dl
ABS CONTNOL UNIT 26P CONNECTOR
RROIBLU/YEL}
RRT IGRN/YELI
FLO(BRN/WHTI
FLl IGFN/ORN}
DTCAppropriate Terminal
{0}srDE(1)S|DE
11, l2lRight-front)No.8: FnoNo.21: FR1
13, 14 (Left-front)No. 10rFLoNo. 23: FLl
15, 16 (RightreadNo.4: RRoNo.17: RR1
17, l8 (Lsft-rear)No.6: RLoNo.19: RL1
(To page 19-46)
19-45
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DTC 31 - 38: Solenoid
ABS CONTROL UNIT 22P CONNECTOR
Wire sade of female terminals
Wire side of female terminals
ABS CONTROL UNIT 26P CONNECTOR
FL.OUT IYEL/8LKI
DTCAppropraateConnectorTerminal
31: FR'lN22PNo. 1
32: FR OUT22PNo. 12
33: FL lN22PNo. 11
34: FL OUT22PNo.10
35:RR-lN26PNo.13
36: RR-OUT22PNo.21
37: RLIN26PNo.25
38: RL-OUT26PNo. 12
RL.OUT {YELI
FL.OUT IYEL/BLKI
DTCAppropriateTerminal
31: FR lNNo. 2i SCOM
32: FR-OUTNo. 2: SCOM
33: FLINNo.1:PCOM
34: FL-OUTNo. 1:PCOM
35:RRINNo. 1: PCON4
36: RR-OUTNo. 1: PCON4
37rRL-lNNo. 2: SCOM
3a: RL-OUTNo. 2: SCOM
RL.OUT {YELI
- With the ignition switch ON{lD, tho ABS indicator doesnot go off, or the ABS indic.-lor comes on whil6 ABS istunctioning.- With th€ SCS service connoc-tor connoctcd {sce page 1$381,DTCa 31 - 38 ars indicatsd.
Check for a 3hori to power in th€solenoid ci.cuit:1. Disconnect the ABS controluntr tlr ano zbr connectors_2. Start the engine.3. Measure the voltage betweenthe appropriate ABS controlunit connector solenoid circuitterminal and body ground (see
table).
R€pair short to power in theapprop.iato solenoid circuit wirebetwe€n the ABS control unitand the modulator unh.
ls there baRery voltage?
Chock for a short to body groundin the sol€noid circuit:Check for continuity between theappropriate solenoid circuit termi-naland body ground (see table).
. Ropair short to body ground inthe appropriato solenoid circuitwire betwoon the ABS controlunit and the modulator unit.. Replace the modulator unit.
ls there continuity?
Check the ABS control unit:1. Turn the ignition switch OFF.2. Connect the ABS control unit22P and 26P connectors.3. Connect the SCS service con-nector.4. Turn the ignition switch ON (ll).5, Measure the voltage betweenthe appropriate ABS controlunit 26P connector COM circuitterminal and body ground (seetable).
Check tor loose ABS control unitconnectors. ll nece$ary, substi-tut€ a known-good ABS controlunit and recheck.
ls there approx. 3 V7
PCOM
(To page l9-48){GRN/WHTI
19-47
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