Electrical Troubleshooting ('97 Model)
Troubleshooting Flowchart - Countershaft Speed Sensor
Possible Cause
. Loose or faulty connection betweenih€ PCM and vehicle harness. Disconnected countershaft spoedsensor conneclor. Short or open in countershaft speed
. Faulty counteBhaft speed lensor
lf the Honda PGMTester is available:I
J
COUNTERSHAFT SPEED SENSOR
CONNECTOR
ll-'T,ll-rT
ral
YIL__l
Terminal side of male terminals
. OBO ll Scan Tool indicates Codem720.' solt-diagnosis iD!' indicator lightblink3 nine tim6s.
Check and record the freeze datain case it is needed later for problem verification.
Connect the Honda PGM Tester,and test-drive the vehicle withthe tester in Data Link or snap'Shot mode, Make sure the coun-tershaft speed sensor reads thesame as the vehicle speed sensorlVSS).
The countershaft sooed sensor isOK sr this time. Veritv that allconnecloas in the circuit aremaking good contacl.
Check the countershaft speedsensor installation, and check itfor damage.
ls the countershaft speed sen-sor installed properly, and notdamaged?neinstall or roDlaco and recheck.
Measuro CountoBhaft Speed Sen-sor Relbtance at the Sensor Con-nector:1. Disconnect the 2P connectorfrom the countershaft speedsensor connector.2. Measure the resistance of thecountershaft speed sensor.
ls the resistance 400 - 600 o?
To page 14-77
14-76
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Electrical Troubleshooting {'97 Model)
Troubleshooting Flowchart - Mainshaft Speed Sensor
Po$ible Cau3o
. Disconnocted mainshaft speod sen-sot connectot. Short or open in mainsh.ft sp6ed
' Faulty meinshaft spoed sensor
NOTE: Code P0715115) on the PCMdoesn't always mean there's an electricalproblem in the mainshaft or counlersharlspeed sensor circuit; code P0715(15) mayalso indicate a mechanical problem in thetransmission. Check the freeze data witha Honda PGM Tester. lf the mainshaftspeed sensor rpm was 0, proceed withthis troubleshooting. lf not, the probablecause is a mechanical problom within thetransmission,
MAINSHAFT SPEEOSENSOR CONNECTOR
_E_
ItiT,ll-F=r
9t
LJ
Terminal side of male terminals
PCM CONNECTOR B {25P'
Wire side of female terminals
. OBD ll Scan Tool indic.t6 Codem715.. Self-diagnosis E indic.tor lightindicatag Code 15.
Check and record the freeze datain case it is needed later {or prob,lem verification.
Check the mainshaft and counter-shaft speed sensor installation,and checkthe sensors for damage.
Are the mainshaft and counter-shaft speed sensors installedproperly, and not damaged?Reingtall or reolace and recheck.
Meaaure MaiNhatt Spoed Sen3orR6sist!nce at the Sensor Con-necaor:1. Disconnect the 2P connectorfrom the mainshaft speed sen-sor connector.2. lreasure the resistance of themainshaft speed sensor.
ls the resistance 400 - 600 O?
Check Mainahaft Speed Sensortor a Short Circuit:1. Disconnect the B (25P) connec-tor lrom the PCM.2. Check for continuity betlveenbody ground and 815 terminaland the 814 terminal individu-
ReDair short in the wir€6 b€t reenthe 815 and 814 torminals andthe mainsh!ft sp€ed sensor.
To page l4-79
14-78
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Electrical Troubleshooting ('98 - 00 Models)
Po$ibl€ Csuse
. Loo3€ or tauhy conn€ction batween the PCM and vehicle harness. Diaconnected countetshaft 3Deod sensor connectoa. Short or opon in countershalt spegd sensor wiro. Faulty countershatt spoed sensol
COUNTERSHAFT SPEEDS€NSOR CONNECIOR
ttt'l-T-T-
rolYILI
Terminal side of male terminals
. OgD ll Sc.n Tool indicat* Codem720.' selt-diagnosis E or E indica-tor light blinks nin6 time3.
It the PGM Tester is available,retrieve the A"/T Freeze Data, thenclear the PCM.
Test-drive the vehicle under thesame conditions the Freeze Data
Intormittent failuro. The systomis OK .t thb time. Check the Iit ofthe pins in rll connsctors .fLctodbv thi! code.
Check the countershaft speedsensor installation. and check itfor damage.
ls the countershaft speed sensorinstalled properly. and not dam-aged?Reinstall or replace and rechcck.
Measure Countershaft Sp6€dSonsoa R€sistsnc€ at the SenlorConnector:1. Disconnect the 2P connectorfrom the countershaft speed
2. Measure countershaft speedsensor resrstance at the sensorconnector.
ls the resistance 400 - 600 0?
To page 14-113
14-112
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Electrical Troubleshooting ('98 - 00 Modelsl
Troubleshooting Flowchart - Mainshaft Speed Sensor
Porsible Cruse
. Disconnsct€d msinsh.ft 3pood 3gnlor conncctol. Short or open in mainshaft 3poed sensor wire. Faultv mainshrtt speed sonsot
NOTE: Codo P0715 (15) on the PCM doesn't always moan there's an electricalproblem in the mainshaft or countershaft speed sensor circuit; code P07'15 (15)may also indicate a mechanical problem in the transmission. Any problem caus-ing irregular countershaft to mainshaft spoed difference can cause this codo; thiscan sometimes be seen in A'/T Free2e Data. Freeze Data can also indicate an elec-trical problem in the sensor circuits ;f one of the sensors reads 0 mph during atest dnve.
MAINSHAFT SPEEDSENSOR CONNECTOR
Terminal side of male terminals
. OBD ll Scan Tool indicat$ Codem715.. S€lf-diagnosi3 E or @ indica-tor light indicatos Code 15.
lf the PGM Tester is available,retrieve the A/f Freeze Data, thenclear the PCM.
Test-drive the vehicle under thesame conditions the Freere Data
Intermittont tailuro. Tha sy3temb OK at this tims. Check thefit oftho pins in .ll connoctoB alt6ctedbv this code.
Did the code return?
Check the mainshaft and counter-shaft speed sensors installation,and check them for damage.
Are the mainshaft and counter-shaft speed sensors installedproperly, and not damaged?Reinstall or ropllce and rochock.
Moasure Mainshatt Spe€d SenrorR€sirtanco at ths S€nsol Connoc-tor:1. Disconnect the 2P connectorfrom the mainshaft speed sensor.2. Measure mainshatt speed sen-sor resrstance at the sensorconnefior.
ls the resistance 400 600 0?
To page 14-115
14-114
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Mai nshaft /Cou ntershaft
Linear Solenoid AssemblySpeed Sensors
Replacement
'1. Remove the mounting bolts and the linear solenoid
assemblY.
Clean the mounting surfaceand fluid passages.
6x1.0mm12 N.m (1.2 kg{.m.8.7 tbtftl
@
@
GASKET
Clean the mounting surface and fluid passage of the
linear solenoid assembly and transmission housing.
Install a new linear solenoid assemblv with a new
gasket. Do not pinch the gasket during installation,
and make sure it is installed properly in the mount-
ing groove of the linear solenoid.
Check the linear solenoid connector for rust. dirt, or
oil, then connect it securelv.
14-138
Replacement
1. Remove the 6 mm bolt and the countershaft sDeed
sensor from the end cover.
\
5x1.0mm12 N.m 11.2 kgf.m, COUNTERSHAFT8.7 rbf.frl SPEED SENSOR
O.RINGReplace.
12 N'm 11.2 kgl.m,8.7 tbf.ftl
Remove the 6 mm bolt and the mainshaft speed
sensor from the transmission housing.
Replace the O-ring with a new one before installing
the countershaft speed sensor or the mainshaft speed
sensor,
6x1.0mm
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The following symptom can be caused
by improper repair or assemblYCheck these items
. lmproper clutch clearance
. lmproper gear clearance
One-way (sprag) clutch installed upside down
Park lever installed upside down
Shift fork bolt not installed
Vehicle creeps in N position.
Vehicle does not move in E, [D.lj, or E
position.
Transmission locks up in E position.
Excessive drag in transmission.ATF pump binding and seizure
Use proper tools when replacing the ATF pump gears, and be careful
to damage the ATF pump when torque down the main valve body.
Check that the shift fork bolt is installed on the shift fork shaft
not
Excessive vibration, rpm related.Torque converter not fully seated in ATF pump
Reverse selector hub installed upside downNoise only with wheels moving.
Mainshaft oil seal po9s out.Mainshaft oil seal improperly installed
lnstallthe mainshaft oil seal tlush with the torque converter housing lf
the mainshaft oil seal is installed into the torque converter housing until
it bottoms. it will block the fluid return passage and result in damage
Various shifting problems.. Springs improperly installed
. Valves improperly installed
Harsh upshift.Check valve balls not installed
(cont'd)
4-155
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Symptom-to-Com ponent Chart
Hydraulic System (cont'd)
NOTES
See flushing procedure, page l4-264 and 265,
BSet idle rpm in gear to specified idle speed. lf still no good, adjust motor mounts as outlined in enginesection of this manual.
clf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
Dlf the clutch pack is seized or is excessively worn. inspect the other clutches fot wear, and check the orificecontrol valves, CPC valve, and linear solenoid for free movement.
lf the linear solenoid is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed. the transmission will not upshift. lf stuck open, the transmission hasno lst gear.
Hlf the 2nd orifice control valve is stuck, inspect the 2nd and 3rd clutch Dacks for wear.
lf the 3-4 orifice control valve is stuck, inspect the 3rd and 4th clutch packs for wear.
Jlf the clutch pressure control valve is stuck closed. the transmission will not shift out of lst gear.
Klmproper alignment of main valve body and torque converter housing may cause ATF pump seizure. Thesymptoms are mostly an rpm-related ticking noise or a high-pitched squeak.
Llf the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump and differentialpinion shaft. lf both are OK and no cause for the contamination is found, replace the torque converter.
Mlf the lst clutch feed pipe guide in the end cover is scored by the mainshaft. inspect the ball bearing forexcessive movement in the transmission housing. lf oK, replace the end cover as it is dented. The o-rinounder the guide is probably worn.
N' Replace the mainshaft if the bushing for the 4th feed pipe is loose or damaged, lf the 4th feed pipe is darrFaged or out of round. replace the end cover.' Replace the mainshaft if the bushing for the l st feed pipe is loose or damaged. lf the 1st feed pipe is dam-aged or out of round, replace it.
oA worn or damaged sprag clutch is mostly a result of shifting the transmission in E!. E, or E positionwhile the wheels rotate in reverse. such as rocking the vehicle in snow.
PInspect the frame for collision damage.
lnspect for damage and wear:
l. Reverse selector gear teeth chamfers.
2. Engagement teeth chamfers of countershaft 4th and reverse gear.
3. Shift fork for scuff marks in center.
4. Differential pinion shaft for wear under pinion gears.
5. Bottom of 3rd clutch for swirl marks.
Replace items 1, 2, 3. and 4 if worn or damaged. lf transmission makes a clicking, grinding, or whirring noise,also replace mainshaft 4th gear, reverse idler gear, and countershaft 4th gear in addition to 1,2, 3, or 4.lf differential pinion shaft is worn, overhaul differential assembly, replace ATF strainer, and thoroughly cjeantransmission, flush torque converter. cooler, and lines,lf bottom of 3rd clutch is swirled and transmission makes gear noise. replace the countershaft and final drivenoear,
Be very careful not to damage the torque converter housing when replacing the main ball bearing. you
may also damage the ATF pump when you torque down the main valve body. This will result in ATF pumpseizure if not detected. Use the Drooer tools.
SInstall the main seal flush with the torque converter housing. lf you push it into the torque converterhousing until it bottoms out, it will block the fluid return passage and result in damage.
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Transfer
4.
Inspection
@E Mako suro lifts, jacks, and safety standsare placod properly lsoe section t).
1. Raise the front of the vehicle, and make sure it issupported securely.
2. Set the parking brake, and block both rear wheelssecurely.
Shift to E position.
Make a reference mark across the propeller shaftand the transfer assembly flanges.
Separate the propeller shaft from the transferassembly.
8 x 1.25 mm32 N.m 13.3 kgl,m,24 lbf.ftlReplace.
14-164
\
6. Set a dial indicator on the transfer assembly flange.then measure the transfer gear backlash.
STANDARD: 0.06 - 0.16 mm (0.002 - 0.006 inl
7. lf the measurement is out of standard, remove thetransfer assembly and adjust transfer gear backlash{see page '14-232 thru 14-2491.
8. Check for fluid leaks between the mating faces oftransfer cover A and cover B.
9. lf there is a fluid leak, remove the cover, and reDlacethe O-ring.
'10. Check for fluid leaks between the mating face of thetransfer assembly and transmission.
11. lf there is a fluid l€ak, remove the transf€r assem-bly, and replace the O-ring,
12. Check the transfer oil seal for damage and fluidle8ks.
13, lf oil seal replacement is required. remove the trans-fer assembly, replace the oil seal, and adjust thetotal starting torque (see page 1+232 thtu ]'4-249||.
NOTE: Do not replace the oil seal with the transferassembly on the transmission.
COMPANION FLANGE
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