Page 1057 of 5135
C58536
C95812
NT+
NT±
05±1020± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT SPEED SENSOR(NT)
(a) Disconnect the sensor connector from the transaxle.
(b) Measure the resistance between terminals of speed sen-
sor (NT).
OK:
Resistance: 560 to 680 at 20C (68F)
NG REPLACE SPEED SENSOR(NT)
OK
2 CHECK HARNESS AND CONNECTOR(SPEED SENSOR±ECM)
(a) Connect the speed sensor (NT) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals NT+ and NT±.
OK:
Resistance: 560 to 680 at 20C (68F)
(d) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for short):
SymbolsSpecified condition
NT+ ± Body groundNo continuityNT± ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM
Page 1058 of 5135
05±1018±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1520STOP LIGHT SWITCH CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while dr\
iving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends signals to the ECM. Then\
the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P1520Stop light switch remains ON while vehicle running (1±trip
detection logic)Short in stop lamp switch signal circuit
Stop lamp switch
ECM
WIRING DIAGRAM
See page 05±115.
INSPECTION PROCEDURE
1 INSPECT STOP LAMP SWITCH ASSY
NG REPLACE STOP LAMP SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ASSY ± ECM)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM
05C8K±01
Page 1059 of 5135
D26539
E1
ECT Solenoid
R
E12SLECM
13
LG
4
SL
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1015
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0773 SHIFT SOLENOID ºEº ELECTRICAL (SHIFT
SOLENOID VALVE SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock±up relay valve, which then controls operation of the lock±up clutch.
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
DTC No.DTC Detecting ConditionTrouble Area
P0773
Either (a) or (b) is detected for 1 time.
(2±trip detection logic)
(a) Solenoid resistance is 8 or less when solenoid is ener-
gized.
(b) Solenoid resistance is 100 k or more when solenoid is not
energized.
Open or short in shift solenoid valve SL circuit
Shift solenoid valve SL
ECM
WIRING DIAGRAM
05687±06
Page 1060 of 5135
C54864
SL
C95812SL E1
05±1016± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SL)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminal SL and the
body ground.
OK:
Resistance: 11 to 15 at 20C (68F)
NG Go to step 3
OK
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE±ECM)
(a) Connect the transmission wire connector to the transaxle.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals SL and E1.
OK:
Resistance: 11 to 15 at 20C (68F)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM
Page 1061 of 5135
D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1017
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT SHIFT SOLENOID VALVE(SL)
(a) Remove the shift solenoid valve SL.
(b) Measure the resistance between terminal SL of shift sole-
noid valve and the solenoid valve body.
OK:
Resistance: 11 to 15 at 20C (68F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
OK REPAIR OR REPLACE TRANSMISSION WIRE
NG
REPLACE SHIFT SOLENOID VALVE(SL)
Page 1062 of 5135
![TOYOTA AVENSIS 2005 Service Repair Manual D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1013
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0770 SHIFT SOLENOID ºEº MALFUNCTION
(SHIFT SOLENOID VALVE SL)
SYSTEM DESCR TOYOTA AVENSIS 2005 Service Repair Manual D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1013
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0770 SHIFT SOLENOID ºEº MALFUNCTION
(SHIFT SOLENOID VALVE SL)
SYSTEM DESCR](/manual-img/14/57441/w960_57441-1061.png)
D30680
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1013
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0770 SHIFT SOLENOID ºEº MALFUNCTION
(SHIFT SOLENOID VALVE SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air±flow meter and crankshaft position sensor
to monitor the engagement condition of the lock±up clutch.
Then the ECM compares the engagement condition of the lock±up clutch with the lock±up schedule in the
ECM memory to detect mechanical trouble of the shift solenoid valve SL, valve body and torque converter
clutch or automatic transaxle (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0770
Lock±up does not occur when driving in the lock±up range
(normal driving at 80 km/h 50 mph), or lock±up remains ON
in the lock±up OFF range.
(2±trip detection logic)
When lock±up is ON, clutch or brake slips or gear is broken.
(2±trip detection logic)Shift solenoid valve SL is stuck open or closed
Valve body blocked or stuck
Shift solenoid valve SL
Torque converter clutch
Automatic transaxle (clutch, brake or gear etc.)
INSPECTION PROCEDURE
1 INSPECT SHIFT SOLENOID VALVE(SL)
(a) Remove the shift solenoid valve SL.
(b) Measure the resistance between terminal SL of shift sole-
noid valve and the solenoid valve body.
OK:
Resistance: 11 to 15 at 20C (68F)
(c) Connect the positive (+) lead to the terminal of solenoid
valve connector and the negative (±) lead to the solenoid
valve body.
OK:
The solenoid valve makes an operating noise.
NG REPLACE SHIFT SOLENOID VALVE(SL)
OK
2 INSPECT TRANSMISSION VALVE BODY ASSY(See chapter 2 in the problem
symptoms table)
NG REPAIR OR REPLACE TRANSMISSION VALVE
BODY ASSY
OK
05C8J±01
Page 1063 of 5135
05±1014± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT TORQUE CONVERTER CLUTCH ASSY
NG REPLACE TORQUE CONVERTER CLUTCH
ASSY
OK
REPAIR AUTOMATIC TRANSAXLE ASSY
Page 1064 of 5135

Range
NORMALSHIFT SOLENOID VALVE
S1 MALFUNCTIONING
Solenoid valveS1 S2GearSHIFT SOLENOID VALVE
S2 MALFUNCTIONINGBOTH SHIFT SOLENOID
VALVES MALFUNCTIONINGSolenoid valve
S1 S2GearSolenoid valve
S1 S2GearGear when shift selector is
manually operated
D
2
1ON
ONON
OFF
OFF
OFF
OFF ON
ON
ONON
OFF
OFF OFF
ON
ON OFFON1st
2nd
3rd
O/D
1st
2nd
3rd
1st
2ndX
X
X
X
X
X
X
X
XOFF
OFF
ON
OFFOFF
OFF
OFF3rd 3rd
O/D
3rd
3rd
O/D
3rdX
X
X
X
X
X
X
X
X ON
ON OFF OFF
OFF
ON
ON2nd
2nd
2nd2nd3rd 3rd
3rd
2nd
2nd3rd 3rd 3rd
3rd
3rd 3rd
3rd
3rd
3rd
X: MalfunctionsOFF
OFF3rd
3rdON
ON
(S range)
(S range)
05±1010± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0753 SHIFT SOLENOID ºAº ELECTRICAL (SHIFT
SOLENOID VALVE S1)
DTC P0758 SHIFT SOLENOID ºBº ELECTRICAL (SHIFT
SOLENOID VALVE S2)
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ON and OFF operation of the shift solenoid valves
S1 and S2 controlled by ECM. If an open or short circuit occurs in either of the solenoid valves, the ECM
controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly (Fail safe func-
tion).
Fail safe function:
If either of the solenoid valve circuits develops an open or short, the ECM turns the other solenoid valve ON
and OFF to shift to the gear positions shown in the table below. The ECM also turns the shift solenoid valve
ST OFF at the same time. If both solenoids malfunction, hydraulic control cannot be performed electronically
and must be done manually.
Manual shifting as shown in the above table must be done (In the case of a short circuit, the ECM stops send-
ing current to the short circuited solenoid).
DTC No.DTC Detection ConditionTrouble Area
P0753
P0758
ECM checks for an open or short circuit in shift solenoid valve
S1 or S2 circuit when it changes
ECM records DTC P0753 or P0758 if condition (a) or (b) is
detected:
(a) When solenoid is energized, solenoid resistance is 8 or
less and it is counted
(b) When solenoid is not energized, solenoid resistance is 100
k or more and it is counted
Open or short in shift solenoid valve S1/S2 circuit
Shift solenoid valve S1/S2
ECM
HINT:
Check the shift solenoid valve S1 when DTC P0753 is output and check the shift solenoid valve S2 when
DTC P0758 is output.
05C8I±01