2003 NISSAN TEANA relay

SC-14
STARTING SYSTEM

STARTING SYSTEMPFP:23300
System Description BKS001ME
Power is supplied at all times:

through 40A fusible link (letter F , located in the fuse and fusible link block)

to ignition switch terminal 1,

through 15A fuse (No. 71, located in the IPDM E/R)

to CPU of IPDM E/R,

through 15A fuse (No. 78, located in the IPDM E/R)

to CPU of IPDM E/R.
With the ignition switch in the ON or START position, power is supplied:
[A/T models]

from ignition relay

through 10A fuse (No. 83, located in the IPDM E/R)

through IPDM E/R terminal 26

to park/neutral position switch terminal 1.
[CVT models]

through ignition relay ( within the IPDM E/R )

to CPU of IPDM E/R.
When the selector lever in the “P” or “N” position, power is supplied:
[A/T models]

through park/neutral position switch terminal 2

to IPDM E/R terminal 53.
[CVT models]

from TCM terminal 24

to IPDM E/R terminal 53.
Ground is supplied:

to IPDM E/R terminals 38, 50 and 60

from grounds E1 and E31.
Then starter relay is turn ON.
With the ignition switch in the START position, IPDM E/R is energized and power is supplied:

from ignition switch terminal 5

to IPDM E/R terminal 4 and

through IPDM E/R terminal 3

to starter motor terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the
engine starts.

HEATED SEAT
SE-61
C
D
E
F
G
H
J
K
L
MA
B
SE

HEATED SEATPFP:87335
System Description BIS0013C

Each seat cushion has seat heater unit.

Front heated seat is composed the following
–Heated seat relay
–Front heated seat switch
–Seat heater unit

Rear heated seat is composed the following
–Heated seat relay
–Heated seat switch
–Seat heater unit
–Heated seat control unit

Heated seat system has two operation pattern, LOW and HIGH.
NOTE:

When handling seat, be extremely careful not to scratch seat heater 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.
FRONT HEATED SEAT
When ignition switch is ON or START, heated seat relay activates.
Then power is supplied

through 10A fuse [No. 8, located in fuse block (J/B)]

through heated seat relay terminals 3 and 5

to front heated seat switch (driver side and passenger side) terminal 1.
Driver Side
LOW FUNCTION
When front heated seat switch (driver side) is in LOW position, power is supplied

through front heated seat switch (driver side) terminal 2

to seat heater (driver side) terminals 53.
And, ground is supplied

to seat heater terminal 52

through grounds B16 and B17.
Then seat heater (driver side) LOW function is activated.
At this time ground is supplied

to front heated seat switch (driver side) terminal 4

through grounds M71 and M72.
Then indicator illuminates in front heated seat switch (driver side).
HIGH FUNCTION
When front heated seat switch (driver side) is in HIGH position, power is supplied

through front heated seat switch (driver side) terminal 3

to seat heater (driver side) terminals 54.
And, ground is supplied

to seat heater terminal 52

through grounds B16 and B17.
Then seat heater (driver side) HIGH function is activated.
At this time ground is supplied

to front heated seat switch (driver side) terminal 4

through grounds M71 and M72.
Then indicator illuminates in front heated seat switch (driver side).

SE-62
HEATED SEAT

Passenger Side
LOW FUNCTION
When front heated seat switch (passenger side) is in LOW position, power is supplied

through front heated seat switch (passenger side) terminal 2

to seat heater (passenger side) terminals 21.
And, ground is supplied

to seat heater terminal 20

through grounds B214 and B217.
Then seat heater (passenger side) LOW function is activated.
At this time ground is supplied

to front heated seat switch (passenger side) terminal 4

through grounds M71 and M72.
Then indicator illuminates in front heated seat switch (passenger side).
HIGH FUNCTIN
When front heated seat switch (passenger side) is in HIGH position, power is supplied

through front heated seat switch (passenger side) terminal 3

to seat heater (passenger side) terminals 22.
And, ground is supplied

to seat heater terminal 20

through grounds B214 and B217.
Then seat heater (passenger side) HIGH function is activated.
At this time ground is supplied

to front heated seat switch (passenger side) terminal 4

through grounds M71 and M72.
Then indicator illuminates in front heated seat switch (passenger side).
REAR HEATED SEAT
When ignition switch is ON, heated seat relay activates.
Then power is supplied

through 10A fuse [No. 3, located in fuse block (J/B)]

through heated seat relay terminals 6 and 7

to heated seat control unit terminal 41 and

to rear heated seat switch LH terminal 22 and RH terminal 30.
Ground is supplied at all times

to heated seat control unit terminal 42

through grounds B16 and B17.
LH Side
LOW FUNCTION
When rear heated seat switch LH is in LOW position, ground is supplied

to heated seat control unit terminal 20

through rear heated seat switch LH terminals 20 and 21

through grounds B16 and B17.
And, power is supplied

through heated seat control unit terminal 36

to seat heater LH terminal 36
ground is supplied

to seat heater LH terminal 39

through grounds B16 and B17.
Then seat heater LH LOW function is activated.
At this time ground is supplied

to rear heated seat switch LH terminal 23

HEATED SEAT
SE-77
C
D
E
F
G
H
J
K
L
MA
B
SE

Check Heated Seat Control Unit Power Supply and Ground Circuit BIS0013K
1. CHECK FUSE
Check the following fuses.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK HEATED SEAT RELAY
Check voltage between heated seat relay harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between fuse and heated
seat relay.
3. CHECK HEATED SEAT RELAY
1. Turn ignition switch OFF.
2. Disconnect heated seat relay connector.
3. Check continuity between terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace heated seat relay.
Component parts Fuse No. Ampere
Fuse block (J/B)3
10A 8
12
ConnectorTerminal
(Wire color)
ConditionVoltage [V]
(Approx.)
(+) (–)
M792 (G)
Ground IGN ON Battery voltage 5 (L)
7 (L)
PIIB2144E
Terminal
Condition Continuity
(+) (–)
3512V direct current supply between terminals
1 and 2.Ye s
No current supply No
6712V direct current supply between terminals
1 and 2.Ye s
No current supply No
SEC202B

SE-78
HEATED SEAT

4. CHECK HEATED SEAT RELAY GROUND CIRCUIT
Check continuity between heated seat relay harness connector M79
terminal 1 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5. CHECK HEATED SEAT CONTROL UNIT POWER SUPPLY
1. Connect heated seat relay connector.
2. Turn ignition switch ON.
3. Check voltage between heated seat control unit harness con-
nector B182 terminal 41 and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 7.
6. CHECK HEATED SEAT CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated seat control unit connector.
3. Check continuity between heated seat control unit harness con-
nector B182 terminal 42 and ground.
OK or NG
OK >> Heated seat control unit power supply and ground circuit
are OK.
NG >> Repair or replace harness.1 (B) – Ground : Continuity should exist.
PIIB2145E
41 (Y/R) – Ground : Battery voltage
PIIB8697E
42 (B) – Ground : Continuity should exist.
PIIB8698E

HEATED SEAT
SE-79
C
D
E
F
G
H
J
K
L
MA
B
SE

7. CHECK HEATED SEAT CONTROL UNIT POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated seat control unit connector.
3. Check continuity between heated seat relay harness connector
M79 terminal 6 and heated seat control unit harness connector
M182 terminal 41.
4. Check continuity between heated seat relay harness connector
M79 terminal 6 and ground.
OK or NG
OK >> Check harness connection.

If it is OK, replace heated seat control unit.

If it is NG, repair or replace malfunction part.
NG >> Repair or replace harness.
Check Heated Seat Switch LH Circuit BIS0013L
1. CHECK HEATED SEAT SWITCH LH CIRCUIT (VOLTAGE)
1. Turn ignition switch OFF.
2. Disconnect heated seat switch LH connector.
3. Turn ignition switch ON.
4. Check voltage between heated seat switch LH harness connec-
tor and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK HEATED SEAT SWITCH LH
1. Turn ignition switch OFF.
2. Check continuity between heated seat switch LH terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace heated seat switch LH.6 (G/R) – 41(Y/R) : Continuity should exist.
6 (G/R) – Ground : Continuity should not exist.
PIIB8699E
ConnectorTerminal
(Wire color)
ConditionVoltage [V]
(Approx.)
(+) (-)
B17620 (GR)
GroundHeated seat switch LH is in
LOW position.5
Except above. 0
19 (GR/R)Heated seat switch LH is in
HIGH position.5
Except above. 0
PIIB2149E
Terminal Condition Continuity
20 - 21Heated seat switch is in LOW position. Yes
Except above. No
19 - 21Heated seat switch is in HIGH position. Yes
Except above. No
PIIB2150E

SE-86
HEATED SEAT

2. CHECK HEATED SEAT SWITCH INDICATOR LH CIRCUIT
Check voltage between heated seat switch LH harness connector
and ground.
OK or NG
OK >> GO TO 4.
NG >> Check harness connection.

If it is OK, replace heated seat switch LH.

If it is NG, repair or replace malfunction part.
3. CHECK HEATED SEAT SWITCH INDICATOR LH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated seat relay connector and heated seat switch LH connector.
3. Check continuity between heated seat relay harness connector
M79 terminal 6 and heated seat switch LH harness connector
B176 terminal 22.
OK or NG
OK >> Check harness connection.
NG >> Repair or replace harness.
4. CHECK HEATED SEAT SWITCH LH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated seat switch LH connector and heated seat control unit connector.
3. Check continuity between heated seat switch LH harness con-
nector B176 terminal 23, 24 and heated seat control unit har-
ness connector B182 terminal 23, 24.
OK or NG
OK >> Check harness connection.

If it is OK, replace heated seat control unit.

If it is NG, repair or replace malfunction part.
NG >> Repair or replace harness.
ConnectorTerminal
(Wire color)
ConditionVoltage [V]
(Approx.)
(+) (-)
B17623 (R/W)
GroundHeated seat switch LH is in
LOW position.Battery voltage
Except above. 0
24 (R/Y)Heated seat switch LH is in
HIGH position.Battery voltage.
Except above. 0
PIIB2164E
6 (GR) – 22 (Y/R) : Continuity should exist.
PIIB2165E
LOW
23 (R/W) – 23 (R/W) : Continuity should exist.
HIGH
24 (R/Y) – 24 (R/Y) : Continuity should exist.
PIIB8704E

HEATED SEAT
SE-87
C
D
E
F
G
H
J
K
L
MA
B
SE

Check Heated Seat Switch Indicator RH Circuit BIS0013Q
1. CHECK HEATED SEAT SWITCH INDICATOR RH POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between heated seat switch RH harness connec-
tor B177 terminal 30 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK HEATED SEAT SWITCH INDICATOR RH CIRCUIT
Check voltage between heated seat switch RH harness connector
and ground.
OK or NG
OK >> GO TO 4.
NG >> Check harness connection.

If it is OK, replace heated seat switch RH.

If it is NG, repair or replace malfunction part.
3. CHECK HEATED SEAT SWITCH INDICATOR RH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect heated seat relay connector and heated seat switch RH connector.
3. Check continuity between heated seat relay harness connector
M79 terminal 6 and heated seat switch RH harness connector
B177 terminal 30.
OK or NG
OK >> Check harness connection.
NG >> Repair or replace harness.30 (Y/R) - Ground : Battery voltage
PIIB2167E
ConnectorTe r m i n a l
(Wire color)
ConditionVoltage [V]
(Approx.)
(+) (-)
B17731 (R/G)
GroundHeated seat switch RH is in
LOW position.Battery volt-
age
Except above. 0
32 (R/B)Heated seat switch RH is in
HIGH position.Battery volt-
age
Except above 0
PIIB2168E
6 (GR) – 30 (Y/R) : Continuity should exist.
PIIB2169E