Diagnostic
Trouble Code(Drc)*
,94
lndicator
Light
SymptomPossible CauseRefer to
Page
P1153(1)Blin ks
Lock-up clutch does not engage,
Lock-up clutch does not disen-
gage.
Disconnected lock-up control solenoid
valve A connector
Short or open in lock-uP control
solenoid valve A wire
Faulty lock-up control solenoid valve A
14-56
P1758
t2lBlinks
. Lock-up clutch does not engage.Disconnected lock-up control solenoid
valve B connector
Short or open in lock-uP control
solenoid valve B wire
Faulty lock-up control solenoid valve B
14-58
P1790(3)Blinks
. Lock-up clutch does not engage.Disconnected throttle position (TP)
sensor connector
Short or open in TP seflsor wire
Faulty TP sensor
14-60
P1191(4)Blinks
. Lock-up clutch does not engage.Disconnected vehicle speed sensor
{VSS} connector
Shon or open in VSS wire
Faulty VSS
14-61
P1705
(5)Blinks
. Fails to shift other than 2nd - 4th
gears.
. Lock-up clutch does not engage.
. Shod in AvT gear position switch wire
. Faulty A,/T gear position switch14-62
P1706(6)OFF
' Fails to shift other than 2nd -
3rd - 4th gears.
. Lock-up clutch does not engage.
Disconnected A/T gear position switch
connector
Open in A/f gear position switch wire
Faulty A/f gear position switch
14-64
P0753
(71Blinks
. Fails to shift (between 1st - 4th
or 2nd - 3rd gear only).. Fails to shift (stuck in 4th gear).
Disconnected shift control solenoid
valve A connector
Short or open in shift control solenoid
valve A wire
Faulty shift control solenoid valve A
14-66
P0758(8)Blinks
. Fails to shift (stuck in 1st or 4th
gears).
Disconnected shift control solenoid
valve B connector
Short or open in shift control solenoid
valve B wire
Faulty shift control solenoid valve B
14-68
P0120(9)Blin ks
Lock-up clutch does not engage.Disconnected countershaft speed sen-
sor connector
Short or open in countershaft speed
sensor wrre
Faulty countershaft speed sensor
1+10
P1192
00)Blinks
. Lock-up clutch does not engage,Disconnected engine coolant tempera-
ture (ECT) sensor connector
Short or open in ECT sensor wire
Faulty ECT sensor
14-72
P0725
{1 1)OFF
Lock-up clutch does not engage.Disconnected ignition coil connector
Short or open in ignition coil wire
Faulty ignition coil
14-73
Symptom-to-ComPonent Chart
Electrical System
(DTC)*: The DTCS in the parentheses are the codes the E indicator light indicates {blinks) when the service check connec-
tor is connected to the special tool (SCS service connector)
4-54
u.drrf,,
J
J
J
14-55
Diagnostic
Trouble Code(DTC).
Ej
lndicator
Light
SymptomPossible CauseRefer to
Page
P1794
(131Blinks
. No specific symptom appears.. Short or open in LT GRN wire between
82 terminal and ECM. Faulty barometric pressure (BARO)
sensor
NOTE: BARO sensor is built into ECM.
't 4-7 4
P1786
(14)Blinks
. Transmission jerks hard when
shifting.
Short or open in FAS (YEL) wire
between 819 terminal and ECM
Faulty ECM
14-76
P0715
(15)Blinks
. Lock-up clutch does not engage,Disconnected mainshaft speed sensor
connector
Short or open in mainshaft speed sen-
sor wrre
Faulty mainshaft speed senso.
14-74
P0740
{ none,OFF. Lock-up clutch does not engage.Faulty lock-up control system14-80
P0730
I none,
. Fails to shift (between lst - 2nd,
2nd - 3rd, 1st - 4th. 3rd - 4th,
1st - 2nd - 3rd, 1st - 2nd - 4th,
1st - 3rd - 4th, or 2nd - 3rd - 4th
gears onry).. Fails to shift (stuck in 1st gears).
. Faulty shift control system
14-81
P0700
(none)
. Other automatic transmission problem (s)
Inspeclthe a utomatic transmission problem (s)accordingto the DTC (s)indicated with code m700.
(DTC)*: The DTCS in the parentheses are the codes the E indicator light indicates (blinks) when the service cnecK connec-tor is connected with the sDecialtool {SCS service connector).
NOTE: WhentheOBDll Scan Tool orHonda PGM Tester indicates the DTC(S) for the automatic transmission control sys-
tem, the scan tool or tester also indicates code P0700 simultaneously. Code P0700 means detection of some automatic
transmission problem on the PGM-Fl control system.
lf the self-diagnostic E indicator light does not blink. perform an inspection according to the table below.
NOTE:
. lf a custombr describes the symptom for code P1706 (6), P0725 (11) or P0715 (15), it will be necessary to recreate the
symptom by test-driving, then recheck the DTC,. Sometimes the E indicator light and the Malfunction Indicator Lamp (MlL) may come on simultaneously. lf so, check
the PGM-Fl system according to the DTC, then reset the memory by removing the BACK UP fuse in the under-dash
fuse/relay box for more than l0 seconds. Drive the vehicle for several minutes at a speed over 30 mph(50 km/h). then recheck the DTC.
. Disconnecting the BACK UP fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the
customer's code number, and make note of the radio presets before removing the fuse so you can reset them.
SymptomInspectionR€f. page
E indicator light does not come on for two seconds after ignition is
first turned on (ll).14-42
E indicator light is on constantly (not blinking) wheneverthe ignition is on {ll).14-84
Lock-up clutch does not have duty operation (ON - OFF).Check A,/C signal with Ay'C
on.14-85Lock-up clutch does not engage.
Shift lever cannot be moved from E position with the brake pedal
oeDresseo.Check brake switch signal.14-86
Troubleshooting Flowchart - Shaft Control System
NOTE: Do not continue with this troubleshootlng until the causesof any other DTCS have been corrected.
Chock foi Another Code:Check whether the OBD ll scantool indicates another code.
Psrtorm tho Tioubla3hootingFlowch.rt fo. th. indicatodCodcl.l.Rechsck tor code P0730 attoltroublolhooting.
Does the OBD ll scan toolindicate anothor code?
Tost 1st, 2nd, 3rd, and 4th ClutchProssuro:Measure the 1st,2nd,3rd, and4th clutch pressure (see page 14-
ls each clutch pressure withinthe service limit?R.p!ir lhG hydraulic ry3t.m ranac.3!.ry l3€e pago 1+991.
Roplace the Shilt ContiolSolonoid Valve A/B Assombly,thon Recheck:1. Turn the ignition switch OFFand reset the TCM memoryby removing the BACK UPfuse in the under-hood fuse/relay box for more than '10
seconds.2. Orive the vehicle at over 12mph (20 km/h) in lst,2nd,3rd, and 4th gear for morethan 30 seconds in E posi-tion.3, Recheck for code P730 (41).
Does the OBD llscan toolorthe E indicator light indicatecode P0730 (4'1)?Tho systom is OX etthi3 timo.
Poitible C.uBe
F""lty "hlft ".^t..t ",/"t".
u
fj
\*J
14-85
Inspsction of tho A/C aign.l
Ch.ck A/C Op.ration:1. Start the engine.2. Turn the blowerswitch ON.3. Push the r'y'C switch ON.
Moaluro ACCL Voltdg.:1. Stop the engine.2. Disconnect the A {26P) con-nector from the TCM.3. Start the engine.4. Measuro the voltage betwoontho A24 and A13 or 426 termi-nals with the Ay'C compressorOFF.
Ropair open in tho wira batwaenth. A24 termin.l and rhc A/Ccomprclsor clulch ralay.
ls therc battery voltage?
. A/C aignal is OK.. Chgck for loo3e TCM connoc-1013. lf neces3ary, 3ub3tituto dknown-good TCM rnd rcchock..Inspect tho A/C sy.tem lso.lection 221.
JSymp(om
' Lock-uD clutch dog3 not haveduty opor.tion ION *OFF).. Lock-up clutch doe3 not ongago.
TCM CONNECIOR A (26PI
J
BLK
WIRE SIDE OF FEMALE TERMINALS
Symptom-to-Component Chart
Hydraulic System
SYMPTOMCheck these items on the
PROBABLE CAUSE List
Check these items
on the NoTES List
Engine runs, but car does not move in any gear.1,2,3,5,6,7,37, 42K,L.R,S
Vehicle moves in E and E, but not in lD,l, D. , or E position.6, 8, 9, 10, 59c,M,o
Vehicle moves in E, o.-, E, E, but not in E position.6,11,12,21c.L
Vehicle moves in 9r, 9. , E, E, but not in E position.4,6, 13,32c,L,o
Vehicle moves in E position.10, 12, 14, 31, 32, 34, 35, 36
Excessive idle vibration.2,33, 31, 44, 49B,K,L
Poor acceleration; flares on starting off in D! position
Stall rpm high in lQ|. E, E, E position.1, 2, 3, 6, 42, 45K,L,R
stall rpm high in lo.tl. ld, E position.6, 8, 10c.D
Stall rpm high in E position.
Stall rpm high in B position.32N
tat"tkp,ril"*'15,33,48,49R
No shift44, 51, 52G,L
Fails to shift in ql position; from 1st to 3rd gear.19
Fails to shift in E position; from lst to 4th gear.19, 20
Erratic upshifting.
1-2 upshift, 2-3 upshift,3-4 upshift64
fiz upshift
ETupshift52
Ia-+ upstrifi5l
Harsh upshift {1-2).12, 16, 11,21,63,64C,D,E,V
Harsh upshift (2-3).16,17,22,24,31,63,64C,D,E.H,L,V
Harsh upshift (3-4).16,' tl. 23, 28, 32, 63, 64C, D, E. I,L.V
Harsh downshift (2-1).16, 17,21,27,34,63,64o
Harsh downshift (3-2).16, 11 ,22,2A,39,57 ,63, 64
Harsh downshift (4'3).16, 17, 23. 40, 56, 63. 64C, D, E, I
Flares on 2-3 upshift.16, 17 ,22,24, 25,29,31E,L,V
Flares on 3-4 upshift,16, 11 ,23,25,24,30,32E,L,V,N
Excessive shock on 2-3 uDshift.16, 11, 22, 24, 29, 38, 46, 64E,L.N
Excessive shock on 3-4 upshift.16, 11 , 23, 2a,29, 40, 46, 64E,L,N
Late shift from E position to d or E position.10, 26M
Late shift from M position to L!!l position.4, 18,32,55o
Noise from transmission in all shift lever Dositions.2,41K,L,O
Vehicle does not accelerate more than 31 mDh (50 km/h).
Shift lever does not operate smoothly.6, 43P
Fails to shifu stuck in 4th gear.5'1,52
Transmission will not shift into parking gear in JII position.6, 43, 62P
Stall rpm high; all clutch pressures are in specification.D,K,O
Lock-up clutch does not disengage.16,17, 47, 48,49, 50, 53, 54, 64E,L,V
Lock-up clutch does not operate smoothly.16, 17, 45, 47 , 48, 49,50, 53. 54, 64
Lock-up clutch does not engage.16,17, 45, 47, 48, 49,50, 53, 54, 63, 64E,L,V
Excessive shock when shifting into E position.60
No engine braking in E position.58, 50C,D.L
Vibration in all positions.
Position indicator light does not come on.6, 43, 61
\.J
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v
14-90
L------
J
L
\a
\."tl
14-91
J
al
PROBABLE CAUSE
1Low ATF.404th check ball stuck.
2ATF pump worn or binding.4'lTorque converter housing or transmissionhousing ball bearing worn/damageo.
3Regulator valve stuck or spring worr..42ATF strainer clogged.
4Servo valve stuck.43Joint in shift cable and transmission or body
5Mainshaft worn/damaged.44Modulator valve stuck.
6Shift cable broken/out of adiustment45Torque converter check valve stuck.
7Final gears worn/damaged (2 gears).46Foreign material in separator plate orifice.
8One.way {sprag) clutch worn/damaged.47Lock-up timing B valve stuck.
91st gears worn/damaged {2 gears).4ALock-up shift valve stuck.
10lst clutch defective.49Lock-up piston defective.
112nd gears worn/damaged (2 gears).50Lock-up control valve stuck.
122nd clutch defective.5lShift control solenoid valve A defective.
Reverse gears worn/damaged (2 gears).52Shift control solenoid valve B defectrve.
14Excessive ATF.53Lock up control solenoid valve A defective,'t5Torque converter one-wav clutch defective.54Lock-up control solenoid valve B defective.
16Throttle valve B stuck.55Servo control valve stuck.
11Throttle control cable out of adiustment.564-3 kick-down valve stuck.
181-2 shift valve stuck.3-2 kick-down valve stuck.'192 3 shift valve stuck.lst-hold clutch defective.
203-4 shift valve stuck.59'| st accumulator defective.
2nd accumulator defective.60'lst-hold accumulator defective,
223rd accumulator delective,olA,rf gear position switch defective,
4th accumulator defective.62Parking mechanism defective.
24Orifice control valve stuck.63Mainshaft speed sensor defective.
Foreign material in main orifice.64Countershaft speed sensor defective.
26Foreign material in lst orifice.
Foreign material in 2nd orifice.
2A2-3 orifice control valve stuck.
29Foreign material in 3rd orifice.
30Foreign material in 4th orifice.
JI3rd clutch defective.
4th clutch defective.
33Engine output low.
34Needle bearing worn/damaged.
35Thrust washer worn/damaged.
36Clutch clearance incorrect.
37Drive plate defective or transmission misas-semory.
382nd check ball stuck.
393rd check ball stuck.
(cont'd)
The following symptoms can be caused
by improper repair or assembly
Checkthese items on the
PROBABLE CAUSE DUE TO
IMPROPER REPAIR Llst
Items on the
NOTES List
Vehicle creeps in E] position.R1, R2
Vehicle does not move in l&l or Lql position.R4
Transmittion locks up in E] position.R3, R12
Excessive drag in transmission.R6K,R
Excessive Vibration, rpm related.R7
Noise with wheels moving only.R5
Msin soal pops out,R8
Various shifting problems.R9, R1O
Harsh upshifts.Rl l
Symptom-to-Gomponent Ghart
Hydraulic System (cont'd)
14-92
\.J
v.4
\/J
PROBABLE CAUSE DUE TO IMPROPER REPAIR
R1lmproper clutch clearance.
R2.lmproper gear clearance.
R3.Parking brake lever installed upside down.
R4.One-way (sprag) clutch installed upside down.
R5.Reverse selector hub installed uoside down.
R6.ATF pump binding.
R7.Torque converter not fully seated in ATF pump.
R8.Main seal improperly installed.
R9.Springs improperly installed.
R10.Valves improperly installed.
R11Ball check valves not installed.
R12.Shift tork bolt not installed.
NOTES
See flushing procedure, page 14-172 and 173.
B.Set idle rpm in gear to specilied idle speed. lf still no good, adjust motor mounts as outlined in enginesection of service manual.
c.lf the large clutch piston O-.ing is broken, inspect the piston groove for rough machining.
D.lf the clutch pack is seized or is excessively worn, inspect the other clutches lor wear, and check the
orifice control valves and throttle valves for free mov€ment.
E.lf throttle valve B is stuck. insDect the clutches for wear.
lf the 1 - 2 shift valve is stuck closed, the transmission will not upshitt. lf stuck open, the transmissionhas no lst gear.
H.lf the 2-3 orilice control valve is stuck, inspect the 2nd and 3rd clutch packs for wear.
lf the orifice control valve is stuck. inspect the 3rd and 4th clutch packs for wear.
J.lf the clutch pressure control valve is stuck closed, the transmission will not shift out oI 1st gear.
lmproper alignment or main valve body and torque converter housing may cause ATF pump seizure.
The symptoms are mostly an rpm-related ticking noise or a high-pitched squeak.
lf 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.
M.lf the 1st clutch feed pipe guide in the right side cover is scored by the mainshaft, inspect the ball bear-
ing lor excessive movement in the transmission housing. lf OK, replace the right side cover as it is dent-
ed. The O-ring under 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 damaged or out of round, replace the right side cover.Replace the sub-shaft il the bushing for the 1st-hold teed pipe is loose or damaged.lf the 1st-hold teed pipe is damaged or out of round, replace it.
Replace the mainshaft iI the bushing for the lst feed pipe is loose or damaged.lf the 1st leed pipe is damaged or out of round, replace it.
A worn or damaged sprag clutch is mostly a result of shifting the transmission in El or LDll position
while the wheels rotate in reverse, such as rocking the vehicle in snow.
P.Inspect the trame for collision damage.
Inspect lor damage and wear:1. 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 tor wear under pinion gears.
5. Bottom of 3rd clutch for swirl marks.Replace items 1 . 2, 3 and 4 iI worn or damaged. lf transmission makes clicking, grinding or whirringnoise, also replace mainshaft 4th gear, reverse idler gear, and countershatt 4th gear in addition to '1,
2,3or4.It differential pinion shalt is worn, overhaul differential assembly, and replace ATF strainer, and thoroughly
clean transmission, tlush torque conveder, cooler and lines.lf bottom ot 3rd clutch is swirled and transmission makes gear noise, replace the countershaft and final
onven qear.
R.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 ATFpump seizure if not detected. Use proper tools.
S.Install the main seal llush 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.
T.Harsh downshifts when coasting to a stop with zero throttle may be caused by a bent-in throttle valve
retainer/cam stopper. Throttle cable adjustment may clear this problem.
Throttle cable adjustment is essential tor proper operation ol the transmission. Not only does it affectthe shift points if misadjusted, but also the shift quality and lock up clutch operation.A cable adjusted too long will result in throttle pressure being too low for the amount of engine torqueinput into the transmission and may cause clutch slippage. A cable adjusted too short will result in toohiqh throttle pressure which may cause harsh shifts, erratic shifts and torque converter hunting.