RM3090E _58 Vehicle Interior _008789 HEATING / AIR CONDITIONING _0049189 AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Manual Air Conditioning System)  PTC Heater Circuit  


DESCRIPTION

The air conditioning amplifier assembly sends operation signals to the PTC heater relays when quick heater assembly operation conditions are met. Based on the signals from the air conditioning amplifier assembly, the PTC heater relays turn on, and power is supplied to the quick heater assembly installed in the air conditioning radiator assembly.

Quick Heater Assembly Operation Condition
Control ECU Condition
Air Conditioning Amplifier Assembly Engine running
Combination switch assembly (ECO mode switch) off
Blower motor on
Temperature set to MAX HOT
IDH terminal signal less than 1 V
(Inverter with converter assembly overload not detected)
·

Engine coolant temperature 65°C or less (3 heaters operate)

·

Engine coolant temperature 70°C or less (2 heaters operate)

·

Engine coolant temperature 75°C or less (A heater operates)


Ambient temperature 10°C or less

WIRING DIAGRAM

E269929E02
3.458,1.292 4.479,1.479 1.021,0.188 10 false PTC HTR NO.1 5.917,0.573 6.531,0.771 0.615,0.198 10 false PTC1 1.927,0.708 2.813,0.906 0.885,0.198 10 false ECU-IG NO.3 5.917,1.76 6.531,1.958 0.615,0.198 10 false PTC3 3.458,2.49 4.552,2.667 1.094,0.177 10 false PTC HTR NO.3 5.927,2.948 6.542,3.146 0.615,0.198 10 false PTC2 3.479,3.688 4.521,3.885 1.042,0.198 10 false PTC HTR NO.2 1.927,3.583 3.01,3.792 1.083,0.208 10 false PTC HTR NO.2 1.927,2.385 3.01,2.594 1.083,0.208 10 false PTC HTR NO.3 1.927,1.198 2.948,1.49 1.021,0.292 10 false PTC HTR NO.1 0.646,1.031 1.5,1.229 0.854,0.198 10 false from Battery 0.125,0.563 1.531,0.771 1.406,0.208 10 false from IG1 NO.2 Relay 5.781,3.354 6.396,3.552 0.615,0.198 10 false G80 5.792,3.542 7.063,3.896 1.271,0.354 10 false Air Conditioning Amplifier Assembly 4.313,4.281 4.458,4.448 0.146,0.167 10 false B 4.323,4.76 4.458,4.927 0.135,0.167 10 false B 4.313,5.302 4.448,5.469 0.135,0.167 10 false B 3.365,5.302 3.5,5.469 0.135,0.167 10 false E 3.365,4.271 3.5,4.438 0.135,0.167 10 false E 3.188,5.531 4.896,5.74 1.708,0.208 10 false Quick Heater Assembly 4.521,4.188 4.802,4.354 0.281,0.167 10 false A31 4.521,4.573 4.802,4.74 0.281,0.167 10 false A31 4.531,5.219 4.813,5.385 0.281,0.167 10 false A31 4.625,3.979 4.75,4.167 0.125,0.188 10 false 1 4.625,4.396 4.75,4.583 0.125,0.188 10 false 2 4.625,5.021 4.75,5.208 0.125,0.188 10 false 3 3.083,3.979 3.208,4.167 0.125,0.188 10 false 1 3.01,4.188 3.292,4.354 0.281,0.167 10 false A30 3.01,5.219 3.292,5.385 0.281,0.167 10 false A35 3.083,5 3.208,5.188 0.125,0.188 10 false 1 4.49,0.458 4.656,0.625 0.167,0.167 10 false 1 4.5,1.667 4.667,1.833 0.167,0.167 10 false 1 3.167,2.833 3.333,3 0.167,0.167 10 false 1 3.188,0.469 3.354,0.635 0.167,0.167 10 false 2 3.188,1.656 3.354,1.823 0.167,0.167 10 false 2 4.5,2.833 4.667,3 0.167,0.167 10 false 2 3.177,0.927 3.344,1.094 0.167,0.167 10 false 5 3.177,2.146 3.344,2.313 0.167,0.167 10 false 5 3.167,3.333 3.333,3.5 0.167,0.167 10 false 5 4.5,0.917 4.667,1.083 0.167,0.167 10 false 3 4.5,2.146 4.667,2.313 0.167,0.167 10 false 3 4.5,3.333 4.667,3.5 0.167,0.167 10 false 3 5.635,0.469 5.844,0.667 0.208,0.198 10 false 13 5.656,1.656 5.865,1.854 0.208,0.198 10 false 20 5.656,2.833 5.854,3.052 0.198,0.219 10 false 19 0.083,0.042 2.365,0.281 2.281,0.24 12 false for Diesel not in Cold Areas:

E273611E01
0.052,0.063 2.896,0.281 2.844,0.219 12 false for Gasoline, Diesel in Cold Areas: 0.229,0.563 1.844,0.781 1.615,0.219 10 false from IG1 NO.2 Relay 0.74,1.042 1.615,1.25 0.875,0.208 10 false from Battery 2.01,0.729 2.969,0.927 0.958,0.198 10 false ECU-IG NO.3 1.958,1.229 2.917,1.427 0.958,0.198 10 false PTC HTR NO.1 1.969,2.417 2.927,2.615 0.958,0.198 10 false PTC HTR NO.2 3.469,1.344 4.427,1.542 0.958,0.198 10 false PTC HTR NO.1 3.469,2.531 4.427,2.729 0.958,0.198 10 false PTC HTR NO.2 5.969,0.594 6.542,0.771 0.573,0.177 10 false PTC1 5.708,0.479 5.938,0.667 0.229,0.188 10 false 13 5.979,1.771 6.552,1.948 0.573,0.177 10 false PTC2 5.719,1.656 5.948,1.844 0.229,0.188 10 false 19 4.531,0.479 4.76,0.667 0.229,0.188 10 false 1 3.24,1.677 3.469,1.865 0.229,0.188 10 false 1 3.25,0.469 3.479,0.656 0.229,0.188 10 false 2 4.542,1.656 4.771,1.844 0.229,0.188 10 false 2 4.542,0.948 4.771,1.135 0.229,0.188 10 false 3 4.552,2.146 4.781,2.333 0.229,0.188 10 false 3 3.25,0.958 3.479,1.146 0.229,0.188 10 false 5 3.25,2.146 3.479,2.333 0.229,0.188 10 false 5 4.635,2.917 4.865,3.104 0.229,0.188 10 false 1 3.125,2.917 3.354,3.104 0.229,0.188 10 false 1 4.656,3.552 4.885,3.74 0.229,0.188 10 false 3 3.146,3.552 3.375,3.74 0.229,0.188 10 false 2 3.063,3.135 3.365,3.333 0.302,0.198 10 false A32 3.063,3.75 3.365,3.948 0.302,0.198 10 false A32 4.354,3.219 4.552,3.396 0.198,0.177 10 false B 4.583,3.74 4.885,3.938 0.302,0.198 10 false A31 3.219,4.094 4.802,4.354 1.583,0.26 10 false Quick Heater Assembly 5.854,2.396 7.094,2.823 1.24,0.427 10 false Air Conditioning Amplifier Assembly 4.583,3.146 4.885,3.344 0.302,0.198 10 false A31 4.375,3.823 4.573,4 0.198,0.177 10 false B 3.417,3.219 3.615,3.396 0.198,0.177 10 false E 3.417,3.813 3.615,3.99 0.198,0.177 10 false E 5.854,2.208 6.427,2.385 0.573,0.177 10 false G80

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active Test.


e.

Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Heater Active Level Quick heater assembly Min.: 0, Max.: 3 -
Body Electrical > Air Conditioner > Active Test
Tester Display
Heater Active Level
50004 121 33

Result:
Proceed to
Heater Active Level changes normally
Heater Active Level does not change normally



Heater Active Level changes normally

2.INSPECT PTC HEATER RELAY

Heater Active Level does not change normally

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM(for Manual Air Conditioning System)>PROBLEM SYMPTOMS TABLE


2.INSPECT PTC HEATER RELAY
a.

for Diesel not in Cold Areas:

E269960C01
1.125,0.927 0.948,0.719 0.948,0.719 0.813,0.719 true 1.542,0.927 1.719,0.74 1.719,0.74 1.865,0.74 true 1.354,0.75 1.531,0.563 1.531,0.563 1.677,0.563 true 1.344,1.229 1.521,1.479 1.521,1.479 1.667,1.479 true 0.646,0.635 0.802,0.833 0.156,0.198 10 1 1.917,0.667 2.073,0.865 0.156,0.198 10 2 1.729,0.479 1.885,0.677 0.156,0.198 10 5 1.729,1.396 1.885,1.594 0.156,0.198 10 3 4.073,1.052 4.229,1.25 0.156,0.198 10 1 3,1.042 3.156,1.25 0.156,0.208 10 2 3,0.646 3.156,0.844 0.156,0.198 10 3 4.073,0.646 4.229,0.844 0.156,0.198 10 5 5.094,1.052 5.25,1.25 0.156,0.198 10 1 6.177,1.052 6.333,1.25 0.156,0.198 10 2 6.177,0.646 6.333,0.844 0.156,0.198 10 5 5.104,0.646 5.26,0.844 0.156,0.198 10 3 2.677,0.063 2.969,0.26 0.292,0.198 10 *1 4.792,0.052 5.083,0.25 0.292,0.198 10 *2
*1 PTC HTR NO.2 relay *2 PTC HTR NO.1 relay, PTC HTR NO.3 relay


i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
3 - 5 Battery voltage is applied between terminals 1 and 2 Below 1 Ω




b.

for Gasoline, Diesel in Cold Areas:

E269961C01
1.438,1.24 1.125,1.385 1.125,1.385 0.948,1.385 true 1.271,0.75 1.115,0.49 1.115,0.49 0.938,0.49 true 1.583,0.729 1.792,0.542 1.792,0.542 1.958,0.542 true 1.469,0.958 1.771,1.073 1.771,1.073 1.938,1.073 true 0.823,0.417 0.979,0.615 0.156,0.198 10 1 2,0.469 2.156,0.667 0.156,0.198 10 2 1.99,0.99 2.146,1.188 0.156,0.198 10 5 0.833,1.302 0.99,1.5 0.156,0.198 10 3 3,0.656 3.156,0.854 0.156,0.198 10 3 4.073,0.656 4.229,0.854 0.156,0.198 10 5 5.094,0.656 5.25,0.854 0.156,0.198 10 3 6.177,0.656 6.333,0.854 0.156,0.198 10 5 3,1.052 3.156,1.25 0.156,0.198 10 2 4.073,1.052 4.229,1.25 0.156,0.198 10 1 5.094,1.052 5.25,1.25 0.156,0.198 10 1 6.177,1.052 6.333,1.25 0.156,0.198 10 2 2.74,0.094 2.948,0.302 0.208,0.208 10 *1 4.844,0.073 5.052,0.281 0.208,0.208 10 *2
*1 PTC HTR NO.2 relay *2 PTC HTR NO.1 relay


i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
3 - 5 Battery voltage is applied between terminals 1 and 2 Below 1 Ω




Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - BATTERY)

NG

REPLACE PTC HEATER RELAY

3.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - BATTERY)
a.
E269962C01
0.052,0.052 0.365,0.25 0.313,0.198 10 *1 1.542,1.667 1.854,1.865 0.313,0.198 10 *2 1.979,1.667 2.292,1.865 0.313,0.198 10 *3 2.49,1.667 2.802,1.865 0.313,0.198 10 *4
*1 No. 2 Engine Room Relay Block
*2 PTC HTR NO.1 relay
*3 PTC HTR NO.2 relay
*4 PTC HTR NO.3 relay


for Diesel not in Cold Areas:

i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

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

Standard Voltage:
PTC HTR NO.1:
Tester Connection Condition Specified Condition
5 - Body ground Always 11 to 14 V
2 - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V

PTC HTR NO.2:
Tester Connection Condition Specified Condition
5 - Body ground Always 11 to 14 V
1 - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V

PTC HTR NO.3:
Tester Connection Condition Specified Condition
5 - Body ground Always 11 to 14 V
2 - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V




b.
E269963C01
0.052,0.031 0.365,0.229 0.313,0.198 10 *1 2.365,2.167 2.677,2.365 0.313,0.198 10 *2 2.646,2.052 2.958,2.25 0.313,0.198 10 *3
*1 No. 2 Engine Room Relay Block
*2 PTC HTR NO.1 relay
*3 PTC HTR NO.2 relay


for Gasoline, Diesel in Cold Areas:

i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

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

Standard Voltage:
PTC HTR NO.1:
Tester Connection Condition Specified Condition
5 - Body ground Always 11 to 14 V
2 - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V

PTC HTR NO.2:
Tester Connection Condition Specified Condition
5 - Body ground Always 11 to 14 V
1 - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V




Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

for Diesel in not Cold Areas:

i.

Disconnect the G80 air conditioning amplifier assembly connector.


ii.

Remove the PTC heater relays from No. 2 engine room relay block.


iii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 - G80-13 (PTC1) Always Below 1 Ω
2 - G80-19 (PTC2) Always Below 1 Ω
1 - G80-20 (PTC3) Always Below 1 Ω
G80-13 (PTC1) - Body ground Always 10 kΩ or higher
G80-19 (PTC2) - Body ground Always 10 kΩ or higher
G80-20 (PTC3) - Body ground Always 10 kΩ or higher




b.

for Gasoline, Diesel in Cold Areas:

i.

Disconnect the G80 air conditioning amplifier assembly connector.


ii.

Remove the PTC heater relays from No. 2 engine room relay block.


iii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 - G80-13 (PTC1) Always Below 1 Ω
2 - G80-19 (PTC2) Always Below 1 Ω
G80-13 (PTC1) - Body ground Always 10 kΩ or higher
G80-19 (PTC2) - Body ground Always 10 kΩ or higher




Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - QUICK HEATER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - QUICK HEATER ASSEMBLY)
a.

for Diesel not in Cold Areas:

i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

Disconnect the A31 quick heater assembly connector.


iii.

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

Standard Resistance:
PTC HTR NO.1:
Tester Connection Condition Specified Condition
3 - A31-1 (B) Always Below 1 Ω
A31-1 (B) - Body ground Always 10 kΩ or higher

PTC HTR NO.2:
Tester Connection Condition Specified Condition
3 - A31-2 (B) Always Below 1 Ω
A31-2 (B) - Body ground Always 10 kΩ or higher

PTC HTR NO.3:
Tester Connection Condition Specified Condition
3 - A31-3 (B) Always Below 1 Ω
A31-3 (B) - Body ground Always 10 kΩ or higher




b.

for Gasoline, Diesel in Cold Areas:

i.

Remove the PTC heater relays from No. 2 engine room relay block.


ii.

Disconnect the A31 quick heater assembly connector.


iii.

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

Standard Resistance:
PTC HTR NO.1:
Tester Connection Condition Specified Condition
3 - A31-1 (B) Always Below 1 Ω
A31-1 (B) - Body ground Always 10 kΩ or higher

PTC HTR NO.2:
Tester Connection Condition Specified Condition
3 - A31-3 (B) Always Below 1 Ω
A31-3 (B) - Body ground Always 10 kΩ or higher




Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (QUICK HEATER ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (QUICK HEATER ASSEMBLY - BODY GROUND)
a.

for Diesel not in Cold Areas:

i.

Disconnect the A30 and A35 quick heater assembly connectors.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A30-1 (E) - Body ground Always Below 1 Ω
A35-1 (E) - Body ground Always Below 1 Ω




b.

for Gasoline, Diesel in Cold Areas:

i.

Disconnect the A32 quick heater assembly connector.


ii.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A32-1 (E) - Body ground Always Below 1 Ω
A32-2 (E) - Body ground Always Below 1 Ω




Result:
Proceed to
OK
NG



OK

7.INSPECT QUICK HEATER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR