SWS -Troubleshooting54B-5
Code No. 13 Front-ECU-related fault or fault in
connecting to ETACS-ECUProbable cause
This diagnosis code is output when the signal output from the front-ECU to
ETACS-ECU contains an error for 15 consecutive communication cycles (0.6
seconds). The diagnosis code output stops when the signal output from the
front-ECU to ETACS-ECU is normal for 15 consecutive communication cycles
(0.6 seconds).Dfront-ECU fault
DETACS-ECU fault
DHarness or connector fault
NG
Repair
NG
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
NG
Repair
NG
Check the harness between the
front-ECU and the battery.
OK
Check the trouble
symptoms.
NG
Replace ETACS-ECU.
OK
Replace front-ECU.Check the trouble symptoms.
NG
Check the harness between the
front-ECU and ETACS-ECU.NG
Repair
OK
Check the trouble symptoms.
OK
Replace front - ECU.
OK
Check the trouble symptoms.NGCheck the harness between the
front-ECU and the body earth, and
repair if necessary.
NG
Check the following connector:
A-11XNG
Repair
YES
Measure at the front-ECU connector
A-11X.
DDisconnect the connector and
test on the relay box side.
DContinuity between terminal 31
and body earth
OK :Continuity confirmed.OKCheck the following connectors:
A-11X, C-135, C-102, C-228NG
Repair
Is code 13 output when the ignition
switch is in the ON position?NOMeasure at the front-ECU connector
A-10X.
DDisconnect the connector and
test on the relay box side.
DVoltage between terminal 7 and
body earth
OK :System voltageNGCheck the following connector:
A-10X
SWS -Troubleshooting54B-6
Code No. 21 Short circuit in communication lines.Probable cause
This diagnostic code is output when the voltage on an SWS communication line
goes LOW for 0.3 seconds. The diagnosis code output stops when the
ETACS-ECU data line voltage goes HIGH for 0.3 seconds, or when the
ETACS-ECU receives a normal signal from another ECU or switch. During the
output of this code, other codes are suppressed.DColumn switch fault
Dfront-ECU fault
DPower window main switch fault
DETACS-ECU fault
DHarness or connector fault
Replace ETACS-ECU.
YES
YES
When the power window main switch connector E-07 is
disconnected, is Code No. 21 output?NOReplace power window main switch.
YES
When the front-ECU connector A-11X disconnected, is Code
NO. 21 output? (However, Code No. 13 is output)NOReplace front-ECU.
OK
Is code 21 no longer output when column switch connector
C-203 is disconnected? (Note that code 12 is still output with
C-203 disconnected.)NOReplace column switch.
NG
Check the harnesses of the column switch ETACS-ECU,
front-ECU, power window main switch.NG
Repair
OK
Check the trouble symptoms.
Check the following connectors:C-228, C-203, C-135,
A-11X, C-102, C-24, E-07, C-110, D-25, C-25NG
Repair
SWS -Troubleshooting54B-10
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure A-1
No communication with MUT-II
Probable cause
Either the ETACS-ECU power supply circuit system or the harness or connector
between the diagnosis connector and ETACS-ECU may be defective.DHarness or connector fault
DETACS-ECU fault
NG
Check the harness between ETACS-ECU and the body earth,
and repair if necessary.
NG
Repair
NG
Repair
OK
Replace ETACS-ECU.
NG
Check the harness between ETACS-ECU and diagnosis
connector.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:
OK
Check the trouble
symptoms.
NO
Measure at the ETACS-ECU connector C-228.
DDisconnect the connector and test on the junction box
side.
DContinuity between terminal 56 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:C-228, C-08
YES
Is communication, by MUT-II, possible with other systems?YESCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
Is communication by MUT-II possible when the ignition switch
is ON?NOCheck the MUT-II diagnosis circuit, and repair if necessary.
NOTE:
When failure is detected on the harness between ETACS-ECU and the body earth, check No. 3 terminal
(C-226) of ETACS-ECU as well. Repair, if required.
Inspection Procedure B-1
Lights left ON reminder warning function not working
normally.
Probable cause
The ETACS-ECU controls the headlamp automatic cut-off function based on input
signals from the following switches.
DIgnition switch (IG1)
DDriver’s door switch
DTail lamp switch
DHeadlamp switchDDriver’s door switch fault
DColumn switch fault
DETACS-ECU fault
DHarness or connector fault
OK
Replace ETACS-ECU.
YES
Check the MUT-II input signals.
DIgnition switch (IG1)
DDriver’s door switch
DTail lamp switch
DHeadlamp switchNGCheck the defective input circuit. (Refer to P.54B-7, Defects
Found by Input Signal Check).
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DCentral locking
DHazard lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
SWS -Troubleshooting54B-11
Inspection Procedure C-1
Central door locking system not working at all.
Probable cause
A change in the input signal from the driver’s door lock actuator activates all the
door lock actuators, causing the ETACS-ECU to lock or unlock all the doors.
If the central locking is not working normally, the driver’s door lock actuator or
the ETACS-ECU may be defective.DDriver’s door lock actuator fault
DETACS-ECU fault
DHarness or connector fault
NG
Repair
OK
Replace ETACS-ECU.
NG
Check the harness between ETACS-ECU and battery.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:C-226, C-211, C-35, C-132
YES
Check the driver’s door lock actuator (Refer to GROUP 42 -
Doors).NG
Repair
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DLights left ON reminder warning function
DHazard warning lamps
DRoom lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1). OK
Check the MUT-II input signals.
DDriver’s door lock actuatorNGCheck the driver’s door lock actuator input circuit system
(Refer to P.54B-30, Inspection Procedure J-6).
Inspection Procedure C-2
Some doors not locking or unlocking.
Probable cause
The door lock actuator of the door(s) that are not responding may be defective.DDoor lock actuator fault
DHarness or connector fault
NG
Check the harness between ETACS-ECU and the door lock
actuator of the door(s) not responding, and repair if necessary.
OK
Check the trouble symptoms.
OK
Check the following connectors:
Repair
Check the driver’s door lock actuator that are not responding
(Refer to GROUP 42 - Doors).NG
Replace
SWS -Troubleshooting54B-12
Inspection Procedure D-1
Power windows not working at all.
Probable cause
Power windows are not operated with the power window
main switch.
The power window relay or the ETACS-ECU may be defective.DPower window relay fault
DETACS-ECU fault
DHarness or connector fault
NG
Check the harness between the power window relay and the
fusible link (5), and repair if necessary.
NG
Repair
OK
Check the trouble
symptoms.
OK
NG
Check the following connectors:
C-224, C-210, C-35 (R.H.drive vehicles only), C-132
OK
Check power window relay (Refer to GROUP 42 - Door.)NG
Replace
Check the MUT-II input signals.
DIgnition switch (IG1)NGCheck the ignition switch (IG1) input circuit system (Refer to
P.54B-26, Inspection Procedure J-2).
NG
Check and repair the harness between the power window
relay and the body earth.
NG
RepairOK
Replace ETACS-ECU.
OK
Check the trouble
symptoms.
OK
Measure at the power window relay connector C-224.
DDisconnect the connector and test on the junction box
side.
DContinuity between terminal 3 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:
Measure at the power window relay connector C-224.
DDisconnect the connector and test on the junction box
side.
DVoltage between terminal 5 and the body earth.
OK :System voltage
SWS -Troubleshooting54B-13
Inspection Procedure D-2
Driver’s power window not responding to power window
main switch.
Probable cause
Either the power window main switch or the driver’s side power window motor
assembly may be defective. The power window lock switch could be ON.DPower window main switch fault
DDriver’s side power window motor assembly fault
DHarness or connector fault
NG
Replace power window main switch.
OK
Replace driver’s side power window motor assembly.
NG
Check the harness between the driver’s power window motor
assembly and the body earth, and repair if necessary.
NG
Repair
OK
Check the trouble
symptoms.
(2) NG
Check the following connectors:
NG
Repair
NG
Check the harness between the driver’s power window motor
assembly and the body earth, and repair if necessary.
NG
Repair
OK
Check the trouble
symptoms.
NG
Check the harness between the driver’s power window motor
assembly and the main switch, and repair if necessary.NG
Repair
OK
Check the trouble
symptoms.
OK
Check the following connectors:
OK
Measure at the driver’s power window motor assembly
connector E-05
DDisconnect the connector and test on the harness side.
DIgnition switch ON
(1) Voltage between terminal 3 and body earth
OK :System voltage
(2) Continuity between terminal 1 and body earth
OK :Continuity confirmed.(1) NGCheck the following connectors:
Check the MUT-II input signals.
DPower window main switchNGCheck the power window main switch input circuit system
(Refer to P.54B-32, Inspection Procedure J-9).
Check the trouble symptoms.
SWS -Troubleshooting54B-14
Inspection Procedure D-3
Windows not responding to passenger or rear power
window switches.
Probable cause
Either the power window sub-switches or the passenger’s or rear power window
motor assembly may be defective.DPower window sub-switch fault
DPassenger’s or rear power window motor assembly
fault
DHarness or connector fault
NG
Repair
NG
Check the harness between the power window sub-switches
and the body earth, and repair if necessary.
NG
Repair
NG
Check the harness between the power window motor
assembly and the power window relay, and repair if
necessary.NG
Repair
NG
Check the harness between the power window motor
assembly and the body earth, and repair if necessary.
NG
Repair
OK
Replace power window
motor assembly.
NG
Repair
NG
Check the harness between the power window motor
assembly and the power window sub-switches.
OK
Check the trouble
symptoms.
OK
Check the trouble
symptoms.
(2) NG
Check the following connectors:
E-05, C-24 (L.H.drive vehicles)
E-20, C-110 (R.H.drive vehicles)
OK
Check the trouble
symptoms.
OK
Check the trouble
symptoms.
OK
Check the following connectors:
OK
Measure at the power window motor assembly connectors
E-05, E-10 and E-22.
DDisconnect the connector and test on the harness side.
DIgnition switch ON
(1) Voltage between terminal 3 and body earth
OK :System voltage
(2) Continuity between terminal 1 and body earth
OK :Continuity confirmed.(1) NGCheck the following connectors:
E-05, C-24, C-210, C-224 (L.H.drive vehicles)
E-20, C-110, C-210, C-224 (R.H.drive vehicles)
OK
Measure at the power window sub-switch connectors E-19,
E-24 and E-11
DDisconnect the connector and test on the harness side.
DContinuity between terminal 2 and body earth.
OK :Continuity confirmed.NGCheck the following connectors:
C-110 (L.H. drive vehicles)
Check power window sub switch (Refer to GROUP 42 -
Door.)NG
Replace
YESTurn the power window lock switch OFF.
NO
Do the power windows respond to the sub-switches?
SWS -Troubleshooting54B-15
Inspection Procedure D-4
Passenger or rear power windows not responding to
power window main switch.
Probable cause
Either the power window main switch or the passenger’s or rear power window
motor assembly may be defective.DPower window main switch fault
DPassenger’s or rear power window motor assembly
fault
DHarness or connector fault
NG
Replace power window main switch.
OK
Replace power window motor assembly.Check the trouble symptoms.
NGCheck the harness between the power window motor
assembly and the power window main switch.NG
Repair
OK
Check the trouble symptoms.
YES
Check the following connectors:
E-20, C-24, C-110, E-07 (L.H. drive vehicles)
E-05, C-24, C-110, E-07 (R.H. drive vehicles)
E-10, D-12, C-133, C-24, E-07 (L.H. drive vehicles)
E-10, D-12, C-133, C-110, E-07 (R.H. drive vehicles)
E-25, D-02, C-112, C-24, E-07 (L.H. drive vehicles)
E-25, D-02, C-112, C-110, E-07 (R.H. drive vehicles)NG
Repair
OK
Do the power windows respond to the sub-switches?NORefer to P.54B-14, Inspection Procedure D-3.
Check the MUT-II input signals.
DPower window main switchNGCheck the power window main switch input circuit system
(Refer to P.54B-32, Inspection Procedure J-9).
Inspection Procedure D-5
Power window timer function not working normally.
Probable cause
The ETACS-ECU controls the headlamp automatic cut-off function based on input
signals from the following switches.
DIgnition switch (IG1)
DDriver’s door switch
If the power window timer function does not operate normally, one of the above
input circuit systems, the power window main switch, or the ETACS-ECU may
be defective.DDriver’s door switch fault
DPower window main switch fault
DETACS-ECU fault
DHarness or connector fault
NG
Replace power window main switch.
OK
Replace ETACS-ECU.Check the trouble symptoms.
Check the MUT-II input signals.
DIgnition switch (IG1)
DDriver’s door switch
DPower window main switchNGCheck the defective input circuit. (Refer to P.54B-8, Defects
Found by Input Signal Check).
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
DCentral locking
DHazard lampsNOCheck ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
YES