Page 1097 of 5135
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
05±1053
AVENSIS REPAIR MANUAL (RM1018E)
(4) Align the marks on the torque sensor wire harness
with the clamp, as shown in the illustration.
NOTICE:
When reusing the clamp, check that there is no dam-
age on it.
When reinstalling the wire harness, make sure there
is no twist in the harness or with other wire harness.
10. FAIL SAFE FUNCTION
(a) If the power steering ECU assy detects a trouble, the ECU
assy halt, fix or lower the steering power assist in order to
protect the system.
HINT:
Repeating the steering operation when stopping or driving at
low speed, or leaving the steering wheel turn fully for long hours
will lower the amount of power assist in order to prevent power
steering ECU assy from heating up. In this case, not operating
the steering for about 10 minutes with engine idle will lead the
fail safe function to return the normal state.
Page 1098 of 5135
050Y7±04
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InLicence No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs
ContinuousIntermittent ( times a day)
Steering operation is heavy.
Steering force to the right and left differs, or steering force is uneven.
PS Warning Light
AbnormalRemains ONDoes not come on
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
EMPS Check Sheet
While running, the steering force does not alter corresponding the vehicle
speed.
Vibration or strange sound comes from the steering column assy.
A malfunction code is outputed at the first time, record the freeze frame data as well (as the DTCs). Freeze Frame Data
When a trouble happens
(
During turningDuring vehicle stopAlways)
OthersCooled Warmed up
/ /Engine() Vehicle Model
The steering returns unwell.
Production Date VIN 05±1044
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK
Page 1099 of 5135
050Y2±04
05±1042
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
ELECTRONIC MOTOR POWER STEERING SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Perform troubleshooting in accordance with the procedure on the following pages\
.
HINT:
See the indicated pages for detailed explanation.
The hand±held tester can be used at step 3, 6, 9, 12.
1VEHICLE BROUGHT TO WORKSHOP
2CUSTOMER PROBLEM ANALYSIS(See page 05±1044)
3 CHECK AND CLEAR DTCS AND FREEZE FRAME DATA
(a)After the completion of the DTC and freeze frame data check, clear the DTCs (See page 05±1045).
4 PROBLEM SYMPTOM CONFIRMATION
SYMPTOM DOES NOT OCCUR(Go to step 5)
SYMPTOM OCCURS(Go to step 6)
5SYMPTOM SIMULATION(See page 01±22)
6DTC CHECK(See page 05±1045)
NORMAL CODE(Go to step 7)
MALFUNCTION CODE(Go to step 8)
7PROBLEM SYMPTOMS TABLE(See page 05±1058)
8DTC CHART(See page 05±1054)
Page 1100 of 5135
±
DIAGNOSTIC SELECTRONI C MO TOR POWER STEERING SYSTEM
05±1043
A VENSIS RE PAIR MANUAL (RM1018E)
9 CIRCUIT INSPECTION( See page 05±1059 to 05±1086 )
10 IDENTIFYING PROBLEMS 11 REPAIR
12 CONFIRMATION TEST
END
Page 1101 of 5135
D30688
ECM
MPX2
MPX1 29
23 E10 11
I14
22 SNOWI14
Integration Relay
8
Driver Side J/B14
DA B E8
ECT Pattern Select SW
*1: RHD
*2: LHD 4 1 W±B
CH
CF
CA 8
11
6
W±B
IPI14 E10 MPX1
MPX2
*1
*2
05±1040± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
PATTERN SELECT SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When SNOW mode is selected with the pattern select switch, the ECM controls the solenoid valves and the
transmission starts from 2nd gear.
In D range, the transmission automatically shifts up through 3rd to O/D as usual.
WIRING DIAGRAM
05C8Q±01
Page 1102 of 5135
D30685
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1041
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT PATTERN SELECT SWITCH ASSY
(a) Disconnect the connector of pattern select switch.
(b) Check the continuity between terminals 1 and 4 of the pat-
tern select switch.
OK:
Pattern select switchSpecified condition
Press continuously Pattern select switchContinuity
Release Pattern select switchNo continuity
NG REPLACE PATTERN SELECT SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ± INTEGRA-
TION RELAY, PATTERN SELECT SWITCH ± BODY GROUND)
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
Page 1103 of 5135
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1035
AVENSIS REPAIR MANUAL (RM1018E)
TRANSMISSION CONTROL SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When shifting the shift lever into S range using the transmission control switch, it is possible to shift in 1 to
4 positions.
Shifting º+º once changes up 1 shift range position, º±º once changes down 1 shift range position respective-
ly.
05C8P±01
Page 1104 of 5135
D30750
ECM
SPT1
SFTD
SFTU L
B
R8
30
23 E10
7
1
2
5J17
J/C
W±B(*1)
(*2) A
A S
SFTD
SFTU
E IG 3 R±WT7
Transmission Control SW
Center J/B
Driver Side J/B
I13
Ignition SW
Engine Room J/B No.4
FL MAIN
Battery
*1: LHD
*2 RHDIJIK IPJ15
J/C A AM1 IG1R±W
W±B B±G
G±Y7
1
CA
7
DB
9
DA
1
DH AM1 GAUGE1 IG1 Relay
5
13
2 DN
31
1
4D1
4B ALT
21E10
E10
W±B
W±B
CG
R±W 1
5
DH
G±R
G±Y
W±B
B±G R±W
B±G 05±1036
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM