Inspection Procedure

INSPECT FUSE (A/C, HTR SUB1, HTR SUB2)

(a) Remove the A/C fuse from the main body ECU.

(b) Remove the HTR SUB1 and HTR SUB2 fuses from the engine room relay block.

(c) Measure the resistance. Standard resistance

Tester Item

Specified Condition

A/C fuse

Below 1 Q

HTR SUB 1 fuse

Below 1 Q

HTR SUB 2 fuse

Below 1 Q

(d) Reinstall the A/C fuse.

(e) Reinstall the HTR SUB1 and HTR SUB2 fuses.

REPLACE FUSE

INSPECT NO. 3 HEATER CONTROL KNOB

No. 3 Heater Control Knob

Htr Toyota Yaris

MAX COOL

MAX HOT

MAX COOL

MAX HOT

E123718E03

E123718E03

(a) Remove the No. 3 heater control knob.

(b) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

3 (IG+) - 6 (B)

Max hot position

Below 1 Q

3 (IG+) - 6 (B)

Other than max hot position

10 kQ or higher

(c) Reinstall the No. 3 heater control knob.

REPLACE NO. 3 HEATER CONTROL KNOB

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AIR CONDITIONING AMPLIFIER)

Htr Toyota Yaris

(a) Disconnect the E6 No. 3 heater control knob connector.

(b) Measure the voltage. Standard voltage

Tester Connection

Condition

Specified Condition

E6-3 (IG+) - Body ground

Ignition switch ON

11 to 14 V

(c) Reconnect the No. 3 heater control knob connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (No. 3 HEATER CONTROL KNOB - AIR CONDITIONING AMPLIFIER)

Wire Harness Side:

No. 3 Heater Control Knob Connector

Front View

(a) Disconnect the E6 No. 3 heater control knob connector.

(b) Disconnect the E9 air conditioning amplifier connector.

(c) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

E6-6 (B) - E9-14 (HEAT)

Below 1 Q

(d) Reconnect the No. 3 heater control knob connector.

(e) Reconnect the air conditioning amplifier connector.

NGj>

Front View

REPAIR OR REPLACE HARNESS OR CONNECTOR

Air Conditioning Amplifier Connector

HEAT

HEAT

E120281E03

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Responses

  • Christian Bar
    What is htr sub1 fuse for in Toyota?
    4 years ago

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