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3. CHECK SEAT BELT BUCKLE SWITCH
Check continuity between seat belt buckle switch terminal 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch.
4. CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat belt buckle switch connector B11 ter-
minal 2 and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace the harness between seat belt buckle
switch and ground.
Check Vehicle Speed Signal NIS000AG
1. CHECK VEHICLE SPEED SIGNAL
1. Turn ignition switch ON.
2. Check signal between passenger seat control unit connector and body ground with oscilloscope.
OK or NG
OK >> Replace passenger seat control unit.
NG >> GO TO 2.
Terminals Condition Continuity
1 2 Seat belt: Fastened No
: Unfastened Yes
PIIA4072E
2 (B) - Ground : Continuity should exist.
PIIA4662E
ConnectorTerminal
(Wire color)
ConditionSignal
(Reference value)
(+) (-)
B3534
(PU)Groun
dWhen vehicle
speed is
approx. 40 km/
h (25 MPH)
PIIA7795EPIIB0078J
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2. CHECK VEHICLE SPEED SIGNAL CIRCUIT HARNESS
1. Turn ignition switch OFF.
2. Disconnect passenger seat control unit connector and unified meter and A/C amp.
3. Check continuity between passenger seat control unit connector
B353 terminal 4 and unified meter and A/C amp. connector M49
terminal 34.
4. Check continuity between passenger seat control unit connector
B353 terminal 4 and ground.
OK or NG
OK >> Vehicle speed signal circuit is OK. Further inspection is
necessary. Refer to DI-18, "
Vehicle Speed Signal
Inspection" .
NG >> Repair or replace harness between passenger seat control unit and unified meter and A/C amp.4 (PU) - 34 (L) : Continuity should exist.
4 (PU) - Ground : Continuity should not exist.
PIIA7797E
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HEATED SEAT
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HEATED SEATPFP:87335
DescriptionNIS000AH
When handling seat, be extremely careful not to scratch heating unit.
To replace heating unit, seat trim and pad should be separated.
Do not use any organic solvent, such as thinner, benzene, alcohol, etc. to clean trims.
PIIA9035E
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SchematicNIS000AI
TIWT0517E
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Wiring Diagram–HSEAT–/For CoupeNIS000AJ
TIWT2291E
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TIWT1619E
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TIWT1620E
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Wiring Diagram–HSEAT–/For Roadster–NIS000AK
TIWT2292E
