2001 TOYOTA AVALON seat memory

DI0FV-08
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-493
649 Author
: Date
:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
Perform troubleshooting of the circuits for the applicable problem symptom in the order given in the chart
below. Proceed to the page located for each circuit.
HINT:

If the instruction ºProceed to next circuit inspection shown on problem symptom tableº 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 reappears even though there are no abnormalities in any of the other circuits, then
check and replace the Seat Position Control ECU as the last step.
SymptomSuspect AreaSee page
Both manual & return functions do not operate(All functions).
3. +B power source circuit
4. Power seat control switch circuit
5. Motor circuit
6. Power seat control ECUDI-494
DI-510
DI-500
IN-30
Both manual & return functions do not operate(One function only).1. Motor circuit
2. Power seat control ECUDI-500
IN-30
One or all functions do not operate for manual operation only.1. Power seat control switch circuit
2. Power seat control ECUDI-510
IN-30
Memory function does not operate.
1. Power seat memory switch circuit
2. Ignition switch circuit
3. Power seat control ECUDI-510
DI-508
IN-30
Return operation does not stop when brake pedal is depressed.1. Stop light switch circuit
2. Power seat control ECUDI-662
IN-30
Only return function does not operate or operates a little, then
stops (All return functions).
1. Power seat memory switch circuit
2. ECU power source circuit
3. Position sensor power source circuit
4. Power seat control ECUDI-513
DI-497
DI-504
IN-30
Only return function does not operate or operates a little, then
stops (Only one return function).1. Position sensor circuit
2. Power seat control ECUDI-506
IN-30

DI6KY-01
I11581
P20P21
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-491
647 Author
: Date
:
2001 AVALON (RM808U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
SSFV e SGND
(P21-4 e P21-19)L-B e BRFront vertical operation0 V e 8 V
SSRL e SGND
(P21-17 e P21-19)L-W e BRRear vertical operation0 V e 8 V
SSRR e SGND
(P21-16e P21-19)L-R e BRReclining operation0 V e 8 V
PVCC e SGND
(P21-5 e P21-19)R e BRPower seat operation8 V
FDWN e Body Ground RBSeat lowered using front vertical SWBelow 1 VFDWN e Body Ground
(P21-24 eBody Ground)R-BOthers10 - 14 V
IG e Body Ground
(P21-13 eBody Ground)R-BIgnition SW ON10 - 14 V
SYSB e Body Ground
(P21-25 eBody Ground)W-GAlways10 - 14 V
MPX1Bd G dMultiplex communication circuit signals0 V e 12 VMPX1 e Body Ground
(P21-14 eBody Ground)G-WOthersResistance
(Approx. 2.5 kW)
SGND e Body Ground
(P21-19 eBody Ground)BRAlwaysBelow 1 V
SSRS e SGND
(P21-3 eP21-19)L e BRSlide operation0 V e 8 V
SLDF e Body Ground BSeat moved forward using slide SWBelow 1 VSLDF e Body Ground
(P21-6 eBody Ground)BOthers10 - 14 V
SLDR e Body Ground BRSeat moved to rear using slide SWBelow 1 VSLDR e Body Ground
(P21-8 eBody Ground)B-ROthers10 - 14 V
LUP e Body Ground RWSeat raised using rear vertical SWBelow 1 VLUP e Body Ground
(P21-22 eBody Ground)R-WOthers10 - 14 V
LDWN e Body Ground RYSeat lowered using rear vertical SWBelow 1 VLDWN e Body Ground
(P21-1 1 eBody Ground)R-YOthers10 - 14 V
FUP e Body Ground BYSeat raised using front vertical SWBelow 1 VFUP e Body Ground
(P21-23 eBody Ground)B-YOthers10 - 14 V
RCLF e Body Ground GBSeat moved forward using reclining SWBelow 1 VRCLF e Body Ground
(P21-10 eBody Ground)G-BOthers10 - 14 V
RCLR e Body Ground GSeat moved to rear using reclining SWBelow 1 VRCLR e Body Ground
(P21-12 eBody Ground)GOthers10 - 14 V
RCL- e GND RBWBSeat moved to rear using reclining SW10 - 14 VRCL e GND
(P20-1 e P20-7)R-B e W-BOthersBelow 1 V

DI-492- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
648 Author
: Date
:
2001 AVALON (RM808U) RCL+ e GND
RWWBSeat moved forward using reclining SW10 - 14 VRCL+ e GND
(P20-2 eP20-7)R-W e W-BOthersBelow 1 V
SLD- e GNDLBWBSeat moved to rear using slide SW10 - 14 VSLD e GND
(P20-3 eP20-7)L-B e W-BOthersBelow 1 V
SLD+ e GNDLWBSeat moved forward using slide SW10 - 14 VSLD+ e GND
(P20-4 eP20-7)L e W-BOthersBelow 1 V
LFT- e GND RWBSeat lowered using rear vertical SW10 - 14 VLFT e GND
(P20-5 eP20-7)R e W-BOthersBelow 1 V
LFT+ e GND LYWBSeat raised using rear vertical SW10 - 14 VLFT+ e GND
(P20-6 eP20-7)L-Y e W-BOthersBelow 1 V
GND e Body Ground
(P20-7 eBody Ground)W-BAIwaysBelow 1 V
+B e Body Ground
(P20-8 eBody Ground)L-OAlways10 - 14 V
FRV- e GND LWWBSeat lowered using front vertical SW10 - 14 VFRV e GND
(P20-9 eP20-7)L-W e W-BOthersBelow 1 V
FRV+ e GND LRWBSeat raised using front vertical SW10 - 14 VFRV+ e GND
(P20-10 eP20-7)L-R e W-BOthersBelow 1 V
MMRY e SWEGYWBSet switch position is OFF.10 - 14 VMMRY e SWE
(P21-9 e P21-7)G-Y e W-BSet switch position is ON.Below 1 V
SW1 e SWEGWWBMemory Switch 1 position is OFF.10 - 14 VSW1 e SWE
(P21-21 e P21-7)G-W e W-BMemory Switch 1 position is ON.Below 1 V
SW2 e SWEYWBMemory Switch 2 position is OFF.10 - 14 VSW2 e SWE
(P21-20 e P21-7)Y e W-BMemory Switch 2 position is ON.Below 1 V

H01021AB0118AB0119R13006H01082H01214
"u
E1 TcACC ON
orAirbag
Sensor
Assembly P/T Squib (RH)
DTC B0130/63 DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-421
577 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T squib (RH).
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the seat belt pretensioner (RH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to LOOK, and wait at least for 20
second.
(b) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(c) Clear the DTC stored in memory (See page DI-349).
(d) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(e) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(f) Check the DTC (See page DI-349).
OK:
DTC B0130/63 is not output.
HINT:
Codes other than code B0130/63 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (RH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.

H01020H02139AB0118AB0119R13006H01083H02206
P/T Squib (RH)Airbag
Sensor
Assembly
PR+
PR-ACC
or
DTC B0131/64
" u
E1 TcON
DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-423
579 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect PR+ and PR- of the con-
nector (on the seat belt pretensioner side) between the
seat belt pretensioner (RH) and the airbag sensor assem-
bly.
(c) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ACC or ON and wait at least for
20 seconds.
(b) Clear the DTC stored in memory (See page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B0131/64 is not output.
HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0118
R13006AB0119H01021
H01083H01217
"u
E1 TcACC ON
orAirbag
Sensor
Assembly P/T Squib (RH)
DTC B0131/64 DLC1
DI-424
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
580 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T squib (RH).
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the seat belt pretensioner (RH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(b) Clear the DTC stored in memory (See page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B0131/64 is not output.
HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (RH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.

H01020H02139AB0118AB0119R13006H01079H02208
P/T Squib (RH)Airbag
Sensor
Assembly
PR+
PR-ACC
or
DTC B0132/61ON " u
E1
Tc DLC1
DI-426
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
582 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect PR+ and PR- of the con-
nector (on the seat belt pretensioner side) between the
seat belt pretensioner (RH) and the airbag sensor assem-
bly.
(c) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ACC or ON and wait at least for
20 seconds.
(b) Clear the DTC stored in memory
(See step 5 on page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B0132/61 is not output.
HINT:
Codes other than code B0132/61 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H01021AB0118AB0119R13006H01079H01208
"u
E1 TcACC ON
orAirbag
Sensor
Assembly P/T Squib (RH)
DTC B0132/61 DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-427
583 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T squib (RH).
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the seat belt pretensioner (RH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(b) Clear the DTC stored in memory
(See step 5 on page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B0132/61 is not output.
HINT:
Codes other than code B0132/61 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (RH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.