| Circuit Diagram |

|
NO |
Description |
|
1 |
ECU Battery(+) |
|
2 |
ECU Battery(+) |
|
3 |
Passenger heater power |
|
4 |
Passenger NTC (+) |
|
5 |
Passenger heater indicator (Low) |
|
6 |
- |
|
7 |
Passenger heater indicator (High) |
|
8 |
- |
|
9 |
ILL (-) |
|
10 |
Passenger heater switch |
|
11 |
Passenger NTC (-) |
|
12 |
Passenger heater GND |
|
13 |
ECU GND |
|
14 |
IGN 1 |
|
15 |
IGN 2 |
|
16 |
Drive heater power |
|
17 |
Drive NTC (+) |
|
18 |
Drive heater indicator (Low) |
|
19 |
- |
|
20 |
Drive heater indicator (High) |
|
21 |
- |
|
22 |
DETENT |
|
23 |
Drive heater switch |
|
24 |
Drive NTC (-) |
|
25 |
Drive heater GND |
|
26 |
ECU GND |
Component Location [Front Seat Heater] 1. Seat heater unit (Assist seat only) 2. Front seat cushion heater 3.
Inspection Front Seat Heater 1. Check for continuity and measure the resistance between terminals No 3 and No 6.
Inspection 1. Check the condenser fins for clogging and damage. If clogged, clean them with water, and blow them with compressed air. If bent, gently bend them using a screwdriver or pliers. 2.
Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of heater core. The PTC heater is an electric heater using a PTC element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective diesel engine.