HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Heater System) TERMINALS OF ECU
AIR CONDITIONING AMPLIFIER ASSEMBLY
Disconnect the N40 air conditioning amplifier assembly connector.
Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No.
(Symbol) |
Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| N40-5 (B) - Body ground | P - Body ground | Power source (Back-up) | Always | 11 to 14 V |
| N40-6 (IG+) - Body ground | V - Body ground | Power source (IG) | Ignition switch ON | 11 to 14 V |
| Ignition switch off | Below 1 V | |||
| N40-17 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
Reconnect the N40 air conditioning amplifier assembly connector.
Measure the voltage, resistance and pulse according to the value(s) in the table below.
| Terminal No.
(Symbol) |
Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| N41-7 (B/V) - Body ground | L - Body ground | Air mix switch signal | ·
Ignition switch ON ·
Blower switch: LO ·
Temperature switch: On |
0.5 to 3.3 V |
| N41-16 (PTC2) - Body ground*1 | V - Body ground | Quick heater assembly operation signal | ·
Ignition switch ON ·
Temperature setting: MAX HOT ·
Ambient temperature: 0°C (32°F) or lower ·
Engine coolant temperature: 62.5°C (144.5°F) or lower ·
Blower switch: Off → LO (after 20 seconds) |
11 to 14 V → Below 1 V |
| N41-17 (PTC3) - Body ground*1 | L - Body ground | Quick heater assembly operation signal | ·
Ignition switch ON ·
Temperature setting: MAX HOT ·
Ambient temperature: 0°C (32°F) or lower ·
Engine coolant temperature: 62.5°C (144.5°F) or lower ·
Blower switch: Off → LO (after 30 seconds) |
11 to 14 V → Below 1 V |
| N41-20 (REC) - Body ground | L - Body ground | Recirculation/fresh motor signal | ·
Ignition switch ON ·
Recirculation/fresh switch: Off → on |
Below 1 V → 11 to 14 V |
| N41-21 (FRS) - Body ground | G - Body ground | Recirculation/fresh motor signal | ·
Ignition switch ON ·
Recirculation/fresh switch: Off → on |
11 to 14 V → Below 1 V |
| N40-1 (CANL) | W | CAN communication line | - | - |
| N40-2 (CANH) | V | CAN communication line | - | - |
| N40-4 (SW 1) - Body ground | GR - Body ground | Blower switch signal | ·
Ignition switch ON ·
Blower switch: Off → on |
11 to 14 V → Below 1 V |
| N40-9 (FR) - Body ground | LG - Body ground | Recirculation/fresh switch signal | ·
Ignition switch ON ·
Recirculation/fresh switch: Off → on |
Below 1 V → 11 to 14 V |
| N40-11 (F DEF) - Body ground | R - Body ground | Mode switch signal | ·
Engine running ·
DEF switch: Off → on |
Below 1 V → 11 to 14 V |
| N40-12 (SWVC) - Body ground*2 | L - Body ground | Idle up switch operation signal | ·
Engine running ·
Blower switch: LO ·
Temperature switch: On ·
Idle up switch: Off → on |
11 to 14 V → Below 1 V |
| N40-23 (PTC1) - Body ground*1 | W - Body ground | Quick heater assembly operation signal | ·
Ignition switch ON ·
Temperature setting: MAX HOT ·
Ambient temperature: 0°C (32°F) or lower ·
Engine coolant temperature: 62.5°C (144.5°F) or lower ·
Blower switch: Off → LO (after 10 seconds) |
11 to 14 V → Below 1 V |
| N40-26 (HEAT) - Body ground*3 | V - Body ground | Max Hot Sensing signal | ·
Ignition switch ON ·
No. 3 heater control switch sub-assembly: MAX HOT position → Other than MAX HOT position |
10 kΩ or higher → Below 3 Ω |
| N39-5 (SG-3) - Body ground | W - Body ground | Ground | Always | Below 1 Ω |
*1: w/ PTC Heater
*2: w/ Idle Up Switch
*3: w/ Max Hot Sensing
ECM
for 1GD-FTV (w/ Exhaust Gas Temperature Sensor for EGR):Engine / Hybrid System>1GD-FTV (ENGINE CONTROL)>ECD SYSTEM (w/ Exhaust Gas Temperature Sensor for EGR)>TERMINALS OF ECM202208,999999,_51,_078856,_0395991,RM100000002570O,
MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
COMBINATION METER ASSEMBLY