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AX–26U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
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HINT:
*: Drive at such a speed in the uppermost gear to engage
lock-up. The vehicle can be driven at a speed lower than the
speed shown in the above diagram under the lock-up
condition.
NOTICE:
It is necessary to drive the vehicle for approximately 30
minutes to detect DTC P0711 (Transmission fluid
temperature sensor "A" performance).
C115866E07
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U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–27
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PROBLEM SYMPTOMS TABLE
HINT:
• Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Replace parts
as necessary.
• The Matrix Chart is divided into 2 chapters. When
troubleshooting, check Chapter 1 first. If instructions are
given in Chapter 1 to proceed to 2, proceed as instructed.
• If the instruction "Proceed to next circuit inspection shown
in problem symptoms table" is given in the flowchart for
each circuit, proceed to the next suspected area in the
table.
• If the problem still occurs even though there are no
malfunctions in any of the circuits, check the ECM and
replace it if necessary.
1. Chapter 1: Electronic Circuit Matrix Chart
Symptom Suspected area See page
No down-shift (a particular gear, from 1st to 4th gear, is
not down-shifted)ECMIN-37
No down-shift (5th -> 4th)1. Transmission control switch (4 <--> D position) circuitAX-44
2. Shift solenoid valve S4 circuit*AX-106
3. ECMIN-37
No up-shift (a particular gear, from 1st to 4th gear, is
not up-shifted)ECMIN-37
No up-shift (4th -> 5th)1. Transmission control switch (4 <--> D position) circuitAX-44
2. Shift solenoid valve S4 circuit*AX-106
3. ECMIN-37
No lock-up1. Stop light switch circuit*AX-62
2. Engine coolant temperature sensor circuit*ES-56
3. ECMIN-37
No lock-up off ECMIN-37
Shift point too high or too low1. Throttle position sensor circuit*ES-56
2. ECMIN-37
Up-shift to 5th from 4th while shift lever on 41. Transmission control switch (4 <--> D position) circuitAX-44
2. ECMIN-37
Up-shift to 5th from 4th while engine is cold1. Engine coolant temperature sensor circuit*ES-56
2. ECMIN-37
Up-shift to 2nd from 1st while shift lever is on L1. Transmission control switch (2 <--> L position) circuit*AX-44
2. ECMIN-37
Harsh engagement (N -> D)1. Shift solenoid valve SL1 circuit*AX-76
2. ECMIN-37
Harsh engagement (lock-up) ECMIN-37
Harsh engagement (any driving position) ECMIN-37
Poor acceleration ECMIN-37
No kick-down ECMIN-37
Engine stalls when starting off or stopping ECMIN-37
Malfunction in shifting1. Park/Neutral position switch circuit*AX-44
2. Transmission control switch (4 <--> D position) circuitAX-44
3. ECMIN-37
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AX–28U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
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HINT:
*: When the circuit is defective, a DTC may be output.
2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair
Symptom Suspected area See page
Vehicle does not move in any forward position and with
the shift lever on R1. Valve body assemblyAX-142
2. B3 U/D brakeAX-181
3. Torque converter clutchAX-179
Vehicle does not move with shift lever on R1. Valve body assemblyAX-142
2. C2 reverse clutchAX-181
3. B2 1st and reverse brakeAX-181
No up-shift (1st -> 2nd)1. Valve body assemblyAX-142
2. B1 2nd and O/D brakeAX-181
No up-shift (2nd -> 3rd)1. Valve body assemblyAX-142
2. C0 direct and O/D clutchAX-181
No up-shift (3rd -> 4th)1. Valve body assemblyAX-142
2. B1 2nd and O/D brakeAX-181
No up-shift (4th -> 5th)1. Shift solenoid valve S4AX-79
2. Valve body assemblyAX-142
3. C3 U/D clutchAX-181
No down-shift (5th -> 4th)1. Shift solenoid valve S4AX-79
2. Valve body assemblyAX-142
No down-shift (4th -> 3rd) Valve body assemblyAX-142
No down-shift (3rd -> 2nd) Valve body assemblyAX-142
No down-shift (2nd -> 1st) Valve body assemblyAX-142
No lock-up or no lock-up off1. Shift solenoid valve DSLAX-65
2. Valve body assemblyAX-142
3. Torque converter clutchAX-179
Harsh engagement (N -> D)1. Shift solenoid valve SL1AX-72
2. Valve body assemblyAX-142
3. C1 accumulatorAX-181
4. C1 forward clutchAX-181
5. F1 No. 1 one-way clutchAX-181
6. F2 U/D one-way clutchAX-181
Harsh engagement (lock-up)1. Shift solenoid valve SL2AX-87
2. Valve body assemblyAX-142
3. Torque converter clutchAX-179
Harsh engagement (N -> R)1. Valve body assemblyAX-142
2. C2 accumulatorAX-181
3. C2 reverse clutchAX-181
4. B2 1st and reverse brakeAX-181
Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th)1. Shift solenoid valve SLTAX-120
2. Valve body assemblyAX-142
Harsh engagement (1st -> 2nd)1. Valve body assemblyAX-142
2. B1 2nd and O/D brakeAX-181
Harsh engagement (2nd -> 3rd)1. Valve body assemblyAX-142
2. C0 accumulatorAX-181
3. C0 direct and O/D clutchAX-181
Harsh engagement (3rd -> 4th)1. Valve body assemblyAX-142
2. B1 2nd and O/D brakeAX-181
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U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–29
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Harsh engagement (4th -> 5th)1. Valve body assemblyAX-142
2. C3 accumulatorAX-181
3. B3 U/D clutchAX-181
Harsh engagement (5th -> 4th)1. Valve body assemblyAX-142
2. B3 accumulatorAX-181
Slip or shudder (forward and reverse: after warm-up)1. Valve body assemblyAX-142
2. Oil strainerAX-142
3. C0 direct and O/D clutchAX-181
4. C1 forward clutchAX-181
5. C3 U/D clutchAX-181
6. B1 2nd and brakeAX-181
7. B3 U/D brakeAX-181
8. F1 No. 1 one-way clutchAX-181
9. F2 U/D one-way clutchAX-181
10. Torque converter clutchAX-179
Slip or shudder (particular position: just after engine
starts)Torque converter clutchAX-179
Slip or shudder (shift lever on R)1. C2 reverse clutchAX-181
2. B2 1st and reverse brakeAX-181
Slip or shudder (1st)1. C1 forward clutchAX-181
2. F1 No. 1 one-way clutchAX-181
3. F2 U/D one-way clutchAX-181
Slip or shudder (2nd) B1 2nd and O/D brakeAX-181
Slip or shudder (3rd) C0 direct and O/D clutchAX-181
Slip or shudder (4th) B1 2nd and O/D brakeAX-181
Slip or shudder (5th) C3 U/D clutchAX-181
Shift position too high or too low Shift solenoid valve SLTAX-120
No engine braking (1st to 4th/shift lever on D) B3 U/D brakeAX-181
No engine braking (1st/shift lever on L)1. Valve body assemblyAX-142
2. B2 1st and reverse brakeAX-181
No engine braking (2nd/shift lever on 2)1. Valve body assemblyAX-142
2. B1 2nd and O/D brakeAX-181
No engine braking (3rd/shift lever on 3) B3 U/D brakeAX-181
No kick-down Valve body assemblyAX-142
Poor acceleration (all positions)1. Shift solenoid valve SLTAX-120
2. Torque converter clutchAX-179
Poor acceleration (5th)1. C3 U/D clutchAX-181
2. U/D planetary gear unitAX-181
Engine stalls when starting off or stopping1. Shift solenoid valve DSLAX-65
2. Torque converter clutchAX-179 Symptom Suspected area See page
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AX–30U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
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TERMINALS OF ECM
1. CHECK ECM
(a) Measure the voltage of the ECM connector.
HINT:
Each ECM terminal's standard voltage is shown in
the table below.
In the table, first follow the information under
"Condition". Look under "Symbols (Terminal No.)"
for the terminals to be inspected. The standard
voltage between the terminals is shown under
"Specified Condition".
Use the illustration above as a reference for the
ECM terminals.
A107881E03
Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
P (B30-24) - E1 (B30-81) R - BR P shift position switch
signalIgnition switch ON and
transfer shift lever on P10 to 14 V
P (B30-24) - E1 (B30-81) R - BR P shift position switch
signalIgnition switch ON and
transfer shift lever not on
PBelow 1 V
R (B30-25) - E1 (B30-81) B - BR R shift position switch
signalIgnition switch ON and
transfer shift lever on R10 to 14 V
R (B30-25) - E1 (B30-81) B - BR R shift position switch
signalIgnition switch ON and
transfer shift lever not on
RBelow 1 V
N (B30-27) - E1 (B30-81) L-B - BR N shift position switch
signalIgnition switch ON and
transfer shift lever on N10 to 14 V
N (B30-27) - E1 (B30-81) L-B - BR N shift position switch
signalIgnition switch ON and
transfer shift lever not on
NBelow 1 V
D (B30-26) - E1 (B30-81) L - BR D shift position switch
signalIgnition switch ON and
transfer shift lever on D or
310 to 14 V
D (B30-26) - E1 (B30-81) L - BR D shift position switch
signalIgnition switch ON and
transfer shift lever not on
D or 3Below 1 V
4 (A9-25) - E1 (B30-81) P - BR 4 shift position switch
signalIgnition switch ON and
transfer shift lever on 410 to 14 V
4 (A9-25) - E1 (B30-81) P - BR 4 shift position switch
signalIgnition switch ON and
transfer shift lever not on 4Below 1 V
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AX
3 (B30-29) - E1 (B30-81) LG - BR 3 shift position switch
signalIgnition switch ON and
transfer shift lever on 310 to 14 V
3 (B30-29) - E1 (B30-81) LG - BR 3 shift position switch
signalIgnition switch ON and
transfer shift lever not on 3Below 1 V
2 (B30-28) - E1 (B30-81) V - BR 2 shift position switch
signalIgnition switch ON and
transfer shift lever on 2
and L10 to 14 V
2 (B30-28) - E1 (B30-81) V - BR 2 shift position switch
signalIgnition switch ON and
transfer shift lever not on 2
and LBelow 1 V
L (A9-26) - E1 (B30-81) V - BR L shift position switch
signalIgnition switch ON and
transfer shift lever on L10 to 14 V
L (A9-26) - E1 (B30-81) V - BR L shift position switch
signalIgnition switch ON and
transfer shift lever not on LBelow 1 V
STP (A9-36) - E1 (B30-81) L - BR Stop light switch signal Brake pedal is depressed Between 10 V and 14 V
STP (A9-36) - E1 (B30-81) L - BR Stop light switch signal Brake pedal is released Below 1 V
SL1+ (B30-16) - SL1-
(B30-17)P - LG SL1 solenoid signal Engine idle speed Pulse generation
(see waveform 1)
SL1+ (B30-16) - SL1-
(B30-17)P - LG SL1 solenoid signal Ignition switch ON Pulse generation
(see waveform 1)
SL1+ (B30-16) - SL1-
(B30-17)P - LG SL1 solenoid signal 1st gear Pulse generation
(see waveform 1)
SL1+ (B30-16) - SL1-
(B30-17)P - LG SL1 solenoid signal Not on 1st gear Below 1 V
SL2+ (B30-12) - SL2-
(B30-13)BR - R SL2 solenoid signal Engine idle speed Pulse generation
(see waveform 2)
SL2+ (B30-12) - SL2-
(B30-13)BR - R SL2 solenoid signal Ignition switch ON Pulse generation
(see waveform 2)
SL2+ (B30-12) - SL2-
(B30-13)BR - R SL2 solenoid signal 1st or 2nd gear Pulse generation
(see waveform 2)
SL2+ (B30-12) - SL2-
(B30-13)BR - R SL2 solenoid signal 3rd, 4th or 5th gear Below 1 V
SL3+ (B30-14) - SL3-
(B30-15)GR - G-R SL3 solenoid signal Engine idle speed Pulse generation
(see waveform 3)
SL3+ (B30-14) - SL3-
(B30-15)GR - G-R SL3 solenoid signal Ignition switch ON Pulse generation
(see waveform 3)
SL3+ (B30-14) - SL3-
(B30-15)GR - G-R SL3 solenoid signal 1st or 2nd gear Pulse generation
(see waveform 3)
SL3+ (B30-14) - SL3-
(B30-15)GR - G-R SL3 solenoid signal 3rd, 4th or 5th gear Below 1 V
DSL (B30-9) - E01 (B30-
22)V - BR DSL solenoid signal Vehicle speed 65 km/h (40
mph), lock-up (ON to OFF)Below 1 V
DSL (B30-9) - E01 (B30-
22)V - BR DSL solenoid signal Vehicle driving under lock-
up positionPulse generation
(see waveform 4)
SLT+ (B30-11) - SLT-
(B30-10)L - W SLT solenoid signal Engine idle speed Pulse generation
(see waveform 5)
SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal Ignition switch ON Below 1 V
SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal 3th, 4th or 5th gear 10 to 14 V
SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal 1st or 2nd gear Below 1 V
S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal Ignition switch ON Below 1 V
S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal 5th gear 10 to 14 V
S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal Not on 5th gear Below 1 V
THO1 (B30-126) - ETHO
(B30-124)Y - B ATF temperature sensor
signalATF temperature 115
C
(239
F) or moreBelow 1.5 V
NT+ (B30-6) - NT- (B30-5) B - G Speed sensor (NT) signal Vehicle speed 20 km/h (12
mph)Pulse generation
(see waveform 6) Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
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AX–32U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
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(b) Using an oscilloscope, check the waveform 1.
Waveform 1 (Reference)
(c) Using an oscilloscope, check the waveform 2.
Waveform 2 (Reference)
(d) Using an oscilloscope, check the waveform 3.
Waveform 3 (Reference)
(e) Using an oscilloscope, check the waveform 4.
Waveform 4 (Reference)
NC+ (B30-4) - NC- (B30-
3)W - Y Speed sensor (NC) signal Vehicle speed 30 km/h (19
mph) (3rd gear)
Engine speed 1,400 rpmPulse generation
(see waveform 7) Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
C140833E01
Item Content
Symbols (Terminal No.) SL1+ (B30-16) - SL1- (B30-17)
Tool Setting 5 V/DIV., 1 msec./DIV.
Condition Engine idle speed
C140833E01
Item Content
Symbols (Terminal No.) SL2+ (B30-12) - SL2- (B30-13)
Tool Setting 5 V/DIV., 1 msec./DIV.
Condition Engine idle speed
C140833E01
Item Content
Symbols (Terminal No.) SL3+ (B30-14) - SL3- (B30-15)
Tool Setting 5 V/DIV., 1 msec./DIV.
Condition Engine idle speed
C133935E01
Item Content
Symbols (Terminal No.) DSL (B30-9) - E01 (B30-22)
Tool Setting 10 V/DIV., 100 msec./DIV.
Condition Vehicle speed 65 km/h (40 mph),
lock-up (ON to OFF)
Page 1152 of 2000
U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–33
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(f) Using an oscilloscope, check the waveform 5.
Waveform 5 (Reference)
(g) Using an oscilloscope, check the waveform 6.
Waveform 6 (Reference)
(h) Using an oscilloscope, check the waveform 7.
Waveform 7 (Reference)
C140833E01
Item Content
Symbols (Terminal No.) SLT+ (B30-11) - SLT- (B30-10)
Tool Setting 5 V/DIV., 1 msec./DIV.
Condition Engine idle speed
C140853E01
Item Content
Symbols (Terminal No.) NT+ (B30-6) - NT- (B30-5)
Tool Setting 5 V/DIV., 0.5 msec./DIV.
Condition Vehicle speed 20 km/h (12 mph)
C140854E01
Item Content
Symbols (Terminal No.) NC+ (B30-4) - NC- (B30-3)
Tool Setting 1 V/DIV., 1 msec./DIV.
Condition Vehicle speed 30 km/h (19 mph) (3rd
gear)
Engine speed 1,400 rpm