Page 2873 of 4770

DI02I±02
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
DI±453
688 Author: Date:
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the diagnostic trouble code check but the trouble still occurs, check the
circuits for each symptom in the order given in the charts on the following pages and proceed to the page
given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
Chapter 1: Electronic Circuit Matrix Chart
Chapter 2: On±vehicle Repair Matrix Chart
Chapter 3: Off±vehicle repair Matrix Chart
If the instruction ºProceed to next circuit inspection shown on matrix chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, then check
and replace the ECM.
1. Chapter 1: Electronic Circuit Matrix Chart
SymptomSuspect AreaSee page
No up±shift (1st " 2nd)ECMIN±31
No up±shift (2nd " 3rd)ECMIN±31
No up±shift (3rd " O/D)
1. O/D main switch circuit
2. O/D cancel signal circuit
3. ECMDI±487
DI±484
IN±31
No down±shift (O/D " 3rd)ECMIN±31
No down±shift (3rd " 2nd)ECMIN±31
No down±shift (2nd " 1st)ECMIN±31
No lock±up or No lock±up offECMIN±31
Shift point too high or too lowECMIN±31
Up±shift to 2nd while in L positionECMIN±31
Up±shift to 3rd while in L positionECMIN±31
Up±shift to O/D from 3rd1. O/D main switch circuit
2. ECMDI±487
IN±31
Up±shift to O/D from 3rd while engine is coldECMIN±31
Harsh engagement (N " D)ECMIN±31
Harsh engagement (Lock±up)ECMIN±31
Harsh engagement (Any driving position)ECMIN±31
Poor accelerationECMIN±31
Large shift shock or engine stalls when starting off or stoppingECMIN±31
Page 2874 of 4770

DI±454
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
689 Author: Date:
2. Chapter 2: On±Vehicle Repair
(: A541E AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM530U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion
1. Manual valve
2. Throttle valve
3. Primary regulator valve
4. Off±vehicle repair matrix chart
DI±453
Vehicle does not move in R positionOff±vehicle repair matrix chartDI±453
No up±shift (1st " 2nd)1. 1±2 shift valve
2. Off±vehicle repair matrix chart
DI±453
No up±shift (2nd " 3rd)1. 2±3 shift valve
2. Off±vehicle repair matrix chart
DI±453
No up±shift (3rd " O/D)1. 3±4 shift valve
2. Off±vehicle repair matrix chart
DI±453
No down±shift (O/D " 3rd)3±4 shift valve
No down±shift (3rd " 2nd)2±3 shift valve
No down±shift (2nd " 1st)1±2 shift valve
No lock±up or No lock±up off1. Lock±up relay valve
2. Off±vehicle repair matrix chart
DI±453
Harsh engagement (N " D)1. C1 accumulator
2. Off±vehicle repair matrix chart
DI±453
Harsh engagement (N " R)
1. C2 accumulator
2. No.1 accumulator control valve
3. Off±vehicle repair matrix chart
DI±453
Harsh engagement (N " L)Low coast modulator valve
Harsh engagement (Lock±up)1. Lock±up relay valve
2. Off±vehicle repair matrix chart
DI±453
Harsh engagement (1st " 2nd " 3rd " O/D)
1. Throttle modulator valve
2. Cut back valve
3. Throttle valve
Harsh engagement (2nd " 3rd)C2 accumulator
Harsh engagement (3rd " O/D)B0 accumulator
Harsh engagement (O/D " 3rd)1. C0 accumulator
2. B
0 accumulator
Slip or shudder (Forward and reverse)
1. Throttle valve
2. Oil strainer
3. Off±vehicle repair matrix chart
DI±453
No engine braking (1st: L position)1. Low coast modulator valve
2. Off±vehicle repair matrix chart
DI±453
No engine braking (2nd: 2 position)1. 2nd coast modulator valve
2. Off±vehicle repair matrix chart
DI±453
No kick±down
1. 1±2 shift valve
2. 2±3 shift valve
3. 3±4 shift valve
Page 2875 of 4770

± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
DI±455
690 Author: Date:
3. Chapter 3: Off±Vehicle Repair
(: A541E AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM530U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion
1. Front and rear planetary gear
2. O/D planetary gear
3. O/D one±way clutch (F
0)
4. O/D direct clutch (C
0)
5. Forward clutch (C
1)
6. O/D brake (B
0)
Vehicle does not move in R position
1. Front and rear planetary gear unit
2. Direct clutch (C
2)
3. O/D direct clutch (C
0)
4. 1st and reverse brake (B
3)
No up±shift (1st " 2nd)1. No. 1 one±way clutch (F1)
2. 2nd brake (B
2)
No up±shift (2nd " 3rd)Direct clutch (C2)
No up±shift (3rd " O/D)O/D brake (B0)
No lock±up or No lock±up offTorque converter clutch
Harsh engagement (N " D)
1. Forward clutch (C1)
2. O/D one±way clutch (F
0)
3. No. 2 one±way clutch (F
2)
Harsh engagement (N " R)1. Direct clutch (C2)
2. 1st and reverse brake (B
3)
Harsh engagement (Lock±up)Torque converter clutch
Slip or shudder (Forward position: After warm±up)
1. Torque converter clutch
2. O/D direct clutch (C
0)
3. Forward clutch (C
1)
4. O/D one±way clutch (F
0)
Slip or shudder (R position)
1. Direct clutch (C2)
2. 1st and reverse brake (B
3)
3. O/D direct clutch (C
0)
Slip or shudder (1st)No. 2 one±way clutch (F2)
Slip or shudder (2nd)1. No. 1 one±way clutch (F1)
2. 2nd brake (B
2)
Slip or shudder (3rd)Direct clutch (C2)
Slip or shudder (O/D)O/D brake (B0)
No engine braking (1st ~ 3rd: D position)2nd brake (B2)
No engine braking (1st: L position)1st and reverse brake (B3)
No engine braking (2nd: 2 position)2nd coast brake (B1)
Poor acceleration (All position)1. Torque converter clutch
2. O/D planetary gear
Poor acceleration (O/D)1. O/D direct clutch (C0)
2. O/D planetary gear
Large shift shock or engine stalls when starting off or stoppingTorque converter clutch
Page 2876 of 4770

DI1KB±01
A00223
Vehicle Speed
Sensor4±Pulse
Combination
Meter
ECM
Transaxle
Vehicle Speed Sensor
4±Pulse
Q00515 Q00514
DI±456
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
691 Author: Date:
CIRCUIT INSPECTION
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4±pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under conditions (a)
and (b)
(2 trip detection logic)
(a) Park/neutral position switch is OFF
(b) Vehicle is being drivenOpen or short in vehicle speed sensor circuit
Vehicle speed sensor
Combination meter
ECM
At ti t l (lthb k t )Clutch or brake slips or gear is brokenAutomatic transaxle (clutch, brake or gear etc.)
WIRING DIAGRAM
See page DI±333.
Page 2877 of 4770
P23875
A02373A02155
Except California, w/ Engine Immobilizer
and / or TRAC:
California, w/ Engine Immobilizer
and / or TRAC:SPD
SPD
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
DI±457
692 Author: Date:
INSPECTION PROCEDURE
1 Check operation of speedometer.
CHECK:
Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display is normal.
NG Check speedometer circuit.
OK
2 Check for short in harness and connector between terminal SPD of ECM and
body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Disconnect the connector from ECM.
CHECK:
Check continuity between terminal SPD of ECM and body
ground.
OK:
No continuity (1 M W or higher)
NG Repair or replace harness or connector.
OK
Page 2878 of 4770
BE6653P23876D01908D02281
ON
SPD
(±)(+)
(±)
(+)
SPD Except California, w/ Engine
Immobilizer and / or TRAC:
California, w/ Engine Immobilizer
and / or TRAC:
DI±458
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
693 Author: Date:
3 Check voltage between terminal SPD of ECM connector and body ground.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminal SPD of ECM connector and
body ground.
OK:
Voltage: 9 ~ 14 V
NG Check for open in harness and connector be-
tween junction connector (J15) and ECM (See
page IN±31).
OK
4 Check for open in harness and connector between junction connector (J15) and
combination meter (See page IN±31).
NG Repair or replace harness or connector.
OK
Page 2879 of 4770
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
DI±459
694 Author: Date:
5 Check ECM (See page IN±31).
NG Replace ECM.
OK
Check and repair the transaxle (clutch, brake
or gear etc.).
Page 2880 of 4770

Q07781
DI±460
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
695 Author: Date:
DTC P0750, P0755 Shift Solenoid A/B Malfunction
(Shift Solenoid Valve No.1/No.2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd or O/D gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
trouble of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.)
DTC No.DTC Detecting ConditionTrouble Area
P0750
P0755During normal driving, the gear required by the ECM does not
match the actual gear
(2 trip detection logic)Shift solenoid valve No.1/No.2 is stuck open or closed
Valve body is blocked up or stuck
Automatic transaxle (clutch, brake or gear etc.)
Check the shift solenoid valve No.1 when DTC P0750 is output and check the shift solenoid valve No.2 when
DTC P0755 is output.
INSPECTION PROCEDURE
1 Check shift solenoid valve No.1 or No.2 operation.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve No.1 or No.2.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve does not leak air.
(b) When battery positive voltage is supplied to the shift sole-
noid valve, check that the valve opens.
NG Replace the shift solenoid valve No.1 or No.2.
OK
DI02K±02