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SE-88
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Revision: 2004 November 2004 FX35/FX45
4. CHECK "MEMORY SWITCH AND LUMBER SUPPORT SWITCH" GROUND CIRCUIT
Check continuity between "memory switch and lumber support
switch" B158 terminal 61 (B/Y) and ground.
OK or NG
OK >> Replace driver seat control unit.
NG >> Repair or replace harness between "memory switch and
lumber support switch" and ground.
Memory Indicator Lamp Circuit CheckAIS002Y7
1. CHECK FUNCTION
With CONSULT-II
With “MEMORY SW INDCTR” in ACTIVE TEST, check operation.
Without CONSULT-II
GO TO 2.
OK or NG
OK >> Memory indicator lamp circuit is OK.
NG >> GO TO 2.
2. CHECK "MEMORY SWITCH AND LUMBER SUPPORT SWITCH" POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect "memory switch and lumber support switch" connector.
3. Check voltage between "memory switch and lumber support
switch" connector B158 terminal 11 (R/W) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between fuse block (J/B) and memory switch and lumber support
switch. 61 (B/Y) – Ground : Continuity should exist.
PIIA6706E
Test item Description
MEMORY SW
INDCTRThe memory switch indicator is lit by receiving the drive signal.
PIIA0319E
11 (R/W) – Ground : Battery voltage
PIIA6705E
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3. CHECK HARNESS CONTINUITY
1. Disconnect driver seat control unit connector.
2. Check continuity between driver seat control unit connector
B152 terminals 23 (Y/W), 36 (Y/G) and "memory switch and
lumber support switch" connector D3 terminals 23 (Y/W), 36 (Y/
G).
3. Check continuity between driver seat control unit connector
B152 terminals 23 (Y/W), 36 (Y/G) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness between automatic drive positioned control unit and "memory switch
and lumber support switch".
4. CHECK SEAT MEMORY SWITCH INDICATOR SIGNAL
Check voltage between driver seat control unit connector B152 ter-
minals 23 (Y/W), 36 (Y/G) and ground.
OK or NG
OK >> Memory indicator lamp circuit is OK.
NG >> Replace "memory switch and lumber support switch".
Uart Communication Line Circuit CheckAIS002Y8
1. CHECK UART LINE HERNESS
1. Disconnect driver seat control unit connector and automatic
drive positioner control unit connector.
2. Check continuity between driver seat control unit connector
B152 terminal 2 (P), 8 (G/Y) and automatic drive positioner con-
nector M49 terminal 10 (B), 26 (G).
3. Check continuity between driver seat control unit connector
B152 terminal 2 (P), 8 (G/Y) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between driver seat control unit and automatic drive positioner.23 (Y/W) – 23 (Y/W) : Continuity should exist.
36 (Y/G) – 36 (Y/G) : Continuity should exist.
23 (Y/W) – Ground : Continuity should not exist.
36 (Y/G) – Ground : Continuity should not exist.
PIIA5077E
23 (Y/W) – Ground : Battery voltage
36 (Y/G) – Ground : Battery voltage
PIIA5078E
2 (P) − 26 (W) : Continuity should exist.
8 (G/Y) − 10 (R) : Continuity should exist.
2 (P) − Ground : Continuity should not exist.
8 (G/Y) − Ground : Continuity should not exist.
PIIA5099E
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SE-90
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Revision: 2004 November 2004 FX35/FX45
2. CHECK UART LINE SIGNAL 1
1. Turn ignition switch ON.
2. Check signal between driver seat control unit connector ground,
with oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Check the flowing.
When voltage waveform dose not appear with a constant voltage (approx. 5V), replace driver
seat control unit.
When voltage waveform dose not appear with a constant voltage (approx. 0V), replace auto-
matic drive positioner control unit.
3. CHECK UART LINE SIGNAL 2
Check signal between automatic driver positioner control unit con-
nector ground, with oscilloscope.
OK or NG
OK >> GO TO 4.
NG >> Check the flowing.
When voltage waveform dose not appear with a constant voltage (approx. 5V), replace auto-
matic driver seat control unit.
When voltage waveform dose not appear with a constant voltage (approx. 0V), replace driver
seat control unit.
4. CHECK DRIVER SEAT CONTROL UNIT
Dose the automatic drive positioner operate, when the driver control unit exchanged?
Does seat memory function operate?
YES >> Replace automatic drive positioner control unit.
NG >> Replace driver seat control unit.
ConnectorTe r m i n a l s
(Wire color)
Condition Signal
(+) (–)
B152 2 (P) GroundSeat
memory
switch 1 or
2 opera-
tion
PIIA5097E
PIIA4814E
ConnectorTe r m i n a l s
(Wire color)
Condition Signal
(+) (–)
M49 10 (R) GroundSeat
memory
switch 1 or
2 opera-
tion
PIIA5098E
PIIA4813E
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Lumber Support Circuit CheckAIS003C1
1. CHECK LUMBER SUPPORT SWITCH
1. Turn ignition switch OFF.
2. Disconnect l"memory switch and lumber support switch" con-
nector.
3. Check voltage between l"memory switch and lumber support
switch" connector B158 terminal 1 (R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between fuse block (J/B) and l"memory switch and lumber support
switch".
2. CHECK LUMBER SUPPORT SWITCH
Check continuity power seat switch.
OK or NG
OK >> GO TO 3.
NG >> Replace power seat switch.
3. CHECK LUMBER SUPPORT MOTOR HARNESS
1. Disconnect lumber support motor connector.
2. Check continuity between l"memory switch and lumber support
switch" connector B158 terminal 31 (W), 32 (L) and lumber sup-
port motor connector B195 terminal 31 (W), 32 (L).
3. Check continuity between l"memory switch and lumber support
switch" connector B159 terminal 31 (W), 32 (L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between l"memory switch and lumber support switch" and lumber sup-
port motor. 1 (R) – Ground: : Battery voltage
PIIA6707E
Terminal Condition Continuity
311 Lumber support switch turned to backward. Yes
16B Lumber support switch turned to forward. No
321 Lumber support switch turned to forward. Yes
16B Lumber support switch turned to backward. No
PIIA6709E
31 (W) − 31 (W) : Continuity should exist.
32 (L) − 32 (L) : Continuity should exist.
31 (W) − Ground : Continuity should not exist.
32 (L) − Ground : Continuity should not exist.
PIIA6710E
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SE-92
AUTOMATIC DRIVE POSITIONER
Revision: 2004 November 2004 FX35/FX45
4. CHECK LUMBER SUPPORT SWITCH GROUND CIRCUIT
Check continuity between lumber support switch connector B158
terminal 16B (B) and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between l"memory switch and lumber support switch" and ground. 16B (B) – Ground : Continuity should exist.
PIIA6708E
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POWER SEAT
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Revision: 2004 November 2004 FX35/FX45
POWER SEATPFP:87016
Automatic Drive Positioner Interlocking Power SeatAIS003L4
A trouble diagnosis of a automatic drive positioner interlocking power seat is refer toSE-11, "AUTOMATIC
DRIVE POSITIONER" .
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SE-94
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Revision: 2004 November 2004 FX35/FX45
SchematicAIS003LF
TIWM0302E
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POWER SEAT
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Revision: 2004 November 2004 FX35/FX45
Wiring Diagram–SEAT– / For Driver SeatAIS002X1
TIWM0303E