Seat. Seat Heater System On-Vehicle Inspection

INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (for Front Side)
INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH (for Front Side)
INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (for Rear Side) (w/ Rear Seat Heater System)
INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH (for Rear Side) (w/ Rear Seat Heater System)

Seat Heater System -- On-Vehicle Inspection

1. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (for Front Side)

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Disconnect the seat heater control sub-assembly LH (for Front Side) connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
b7-6 (E) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
b7-1 (SWL) - b7-6 (E)	Ignition switch ON, seat heater switch LH off	Below 1 V
b7-1 (SWL) - b7-6 (E)	Ignition switch ON, seat heater switch LH on	11 to 14 V
b7-4 (B) - b7-6 (E)	Ignition switch off	Below 1 V
b7-4 (B) - b7-6 (E)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Seat Heater Control Sub-assembly LH [for Front Side])

If the result is not as specified, there may be a malfunction on the wire harness side.

Connect the seat heater control sub-assembly LH (for Front Side) connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
b7-5 (THL) - Body ground
Ignition switch ON, seat heater switch LH on, MIN → MAX
Gradual increase between value below 1 V and value from 11 to 14 V
Text in Illustration
*a
Component with harness connected
(Seat Heater Control Sub-assembly LH [for Front Side])
If the result is not as specified, the seat seat heater control sub-assembly LH (for Front Side) may have a malfunction.

Text in Illustration
*a	Component with harness connected (Seat Heater Control Sub-assembly LH [for Front Side])

2. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH (for Front Side)

Disconnect the seat heater control sub-assembly RH (for Front Side) connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
a7-6 (E) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
a7-1 (SWR) - a7-6 (E)	Ignition switch ON, seat heater switch RH off	Below 1 V
a7-1 (SWR) - a7-6 (E)	Ignition switch ON, seat heater switch RH on	11 to 14 V
a7-4 (B1) - a7-6 (E)	Ignition switch off	Below 1 V
a7-4 (B1) - a7-6 (E)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Seat Heater Control Sub-assembly RH [for Front Side])

If the result is not as specified, there may be a malfunction on the wire harness side.

Connect the seat heater control sub-assembly RH (for Front Side) connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
a7-5 (THR) - Body ground
Ignition switch ON, seat heater switch RH on, MIN → MAX
Gradual increase between value below 1 V and value from 11 to 14 V
Text in Illustration
*a
Component with harness connected
(Seat Heater Control Sub-assembly RH [for Front Side])
If the result is not as specified, the seat seat heater control sub-assembly RH (for Front Side) may have a malfunction.

Text in Illustration
*a	Component with harness connected (Seat Heater Control Sub-assembly RH [for Front Side])

3. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (for Rear Side) (w/ Rear Seat Heater System)

Disconnect the seat heater control sub-assembly LH (for Rear Side) connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
x1-6 (E) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
x1-1 (SWL) - x1-6 (E)	Ignition switch ON, seat heater switch LH off	Below 1 V
x1-1 (SWL) - x1-6 (E)	Ignition switch ON, seat heater switch LH on	11 to 14 V
x1-4 (B) - x1-6 (E)	Ignition switch off	Below 1 V
x1-4 (B) - x1-6 (E)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Seat Heater Control Sub-assembly LH [for Rear Side])

If the result is not as specified, there may be a malfunction on the wire harness side.

Connect the seat heater control sub-assembly LH (for Rear Side) connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
x1-5 (THL) - Body ground
Ignition switch ON, seat heater switch LH on, MIN → MAX
Gradual increase between value below 1 V and value from 11 to 14 V
Text in Illustration
*a
Component with harness connected
(Seat Heater Control Sub-assembly LH [for Rear Side])
If the result is not as specified, the seat seat heater control sub-assembly LH (for Rear Side) may have a malfunction.

Text in Illustration
*a	Component with harness connected (Seat Heater Control Sub-assembly LH [for Rear Side])

4. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH (for Rear Side) (w/ Rear Seat Heater System)

Disconnect the seat heater control sub-assembly RH (for Rear Side) connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
w1-6 (E) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
w1-1 (PWR) - w1-6 (E)	Ignition switch ON, seat heater switch RH off	Below 1 V
w1-1 (PWR) - w1-6 (E)	Ignition switch ON, seat heater switch RH on	11 to 14 V
w1-4 (B) - w1-6 (E)	Ignition switch off	Below 1 V
w1-4 (B) - w1-6 (E)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Seat Heater Control Sub-assembly RH [for Rear Side])

If the result is not as specified, there may be a malfunction on the wire harness side.

Connect the seat heater control sub-assembly RH (for Rear Side) connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
w1-5 (THR) - Body ground
Ignition switch ON, seat heater switch RH on, MIN → MAX
Gradual increase between value below 1 V and value from 11 to 14 V
Text in Illustration
*a
Component with harness connected
(Seat Heater Control Sub-assembly RH [for Rear Side])
If the result is not as specified, the seat seat heater control sub-assembly RH (for Rear Side) may have a malfunction.

Tester Connection	Condition	Specified Condition
b7-6 (E) - Body ground	Always	Below 1 Ω

Tester Connection	Switch Condition	Specified Condition
b7-5 (THL) - Body ground	Ignition switch ON, seat heater switch LH on, MIN → MAX	Gradual increase between value below 1 V and value from 11 to 14 V

Tester Connection	Switch Condition	Specified Condition
a7-5 (THR) - Body ground	Ignition switch ON, seat heater switch RH on, MIN → MAX	Gradual increase between value below 1 V and value from 11 to 14 V

Tester Connection	Switch Condition	Specified Condition
x1-5 (THL) - Body ground	Ignition switch ON, seat heater switch LH on, MIN → MAX	Gradual increase between value below 1 V and value from 11 to 14 V

Tester Connection	Switch Condition	Specified Condition
w1-5 (THR) - Body ground	Ignition switch ON, seat heater switch RH on, MIN → MAX	Gradual increase between value below 1 V and value from 11 to 14 V