Air Conditioning. Air Conditioning System (For Automatic Air Conditioning System) Ptc Heater Circuit

Heater & Air Conditioning System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

Air Conditioning. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT PTC HEATER RELAY (PTC NO. 1, PTC NO. 2, PTC NO. 3*)

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

CHECK HARNESS AND CONNECTOR (PTC HEATER RELAY - QUICK HEATER)

INSPECT QUICK HEATER ASSEMBLY

CHECK HARNESS AND CONNECTOR (QUICK HEATER - BODY GROUND)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - PTC Heater Circuit

DESCRIPTION

PTC heater relays are closed in accordance with signals from the air conditioning amplifier assembly and power is supplied to the quick heater assembly installed on the radiator heater unit.

WIRING DIAGRAM

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Ptc Heater Circuit

INSPECTION PROCEDURE

1.INSPECT PTC HEATER RELAY (PTC NO. 1, PTC NO. 2, PTC NO. 3*)

*: except Cold Area

Remove the PTC NO. 1, PTC NO. 2 and PTC NO. 3* relays from the engine room No. 2 relay block.

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 to terminals 1 and 2
10 kΩ or higher
Battery voltage is applied to terminals 1 and 2
Below 1 Ω

REPLACE PTC HEATER RELAY (PTC NO. 1, PTC NO. 2, PTC NO. 3*)

OK

2.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Remove the air conditioning amplifier assembly with its connectors still connected (RAV4_ACA30 RM0000012KH00CX.html).

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E41-3 (PTC1) - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 75°C (167°F) or less Headlight dimmer switch: off Blower switch: off	Below 1 V*1
E41-22 (PTC2) - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 70°C (158°F) Headlight dimmer switch: off Blower switch: off
E41-4 (PTC3)*2 - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 65°C (149°F) or less Headlight dimmer switch: off Blower switch: off
E41-3 (PTC1) - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 75°C (167°F) or less Headlight dimmer switch: off Blower switch: lo	11 to 14 V*1
E41-22 (PTC2) - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 70°C (158°F) Headlight dimmer switch: off Blower switch: lo
E41-4 (PTC3)*2 - Body ground	Engine is running (1250 rpm or more) Temperature setting: MAX. HOT Outside temperature: 10°C (50°F) or less Engine coolant temperature: 65°C (149°F) or less Headlight dimmer switch: off Blower switch: lo

*1: After the measurement conditions are met, wait 30 seconds before performing measurements.
*2: except Cold Area

Go to step 6

OK

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

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

Disconnect the A29 quick heater assembly connector.

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

Standard Resistance:

except Cold Area:

Tester Connection	Condition	Specified Condition
PTC NO. 1 relay terminal 5 - A29-1 (B)	Always	Below 1 Ω
PTC NO. 2 relay terminal 5 - A29-2 (B)
PTC NO. 3 relay terminal 5 - A29-3 (B)
PTC NO. 1 relay terminal 5 - Body ground	Always	10 kΩ or higher
PTC NO. 2 relay terminal 5 - Body ground
PTC NO. 3 relay terminal 5 - Body ground

for Cold Area:

Tester Connection	Condition	Specified Condition
PTC NO. 1 relay terminal 5 - A29-1 (B)	Always	Below 1 Ω
PTC NO. 2 relay terminal 5 - A29-3 (B)
PTC NO. 1 relay terminal 5 - Body ground	Always	10 kΩ or higher
PTC NO. 2 relay terminal 5 - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.INSPECT QUICK HEATER ASSEMBLY

Disconnect the quick heater assembly connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 (B) - 1 (E)
Always
Below 1 kΩ
2 (B) - 1 (E)
2 (B) - 2 (E)
3 (B) - 2 (E)

REPLACE QUICK HEATER ASSEMBLY (RAV4_ACA30 RM0000022AH00HX.html)

OK

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

for Cold Area

Disconnect the A30 quick heater assembly connector.

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
A30-2 (E) - Body ground

except Cold Area

Disconnect the A68 and A69 quick heater assembly connectors.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
A68-1 (E) - Body ground
Always
Below 1 Ω
A69-1 (E) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)

Disconnect the E41 amplifier connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
E41-3 (PTC1) - Body ground
Always
Below 200 Ω
E41-22 (PTC2) - Body ground
E41-4 (PTC3)* - Body ground
*: except Cold Area

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (RAV4_ACA30 RM0000012KH00CX.html)