Toyota 4Runner: Relay(w/ Ptc Heater)

Toyota 4Runner Service Manual / Vehicle Interior / Heating / Air Conditioning / Relay(w/ Ptc Heater)

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. REMOVE PTC HEATER RELAY (PTC NO. 1, PTC NO. 1, PTC NO. 3)

(a) Remove the 3 PTC heater relays from the engine room relay block.

Text in Illustration

*1	PTC No. 1 Relay
*2	PTC No. 2 Relay
*3	PTC No. 3 Relay

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage not applied between terminals 1 and 2	10 kΩ or higher
3 - 5	Battery voltage applied to terminal 1 and 2	Below 1 Ω

If the result is not as specified, replace the relay.

3. INSTALL PTC HEATER RELAY (PTC NO. 1, PTC NO. 2, PTC NO. 3)

(a) Install the 3 PTC heater relays to the engine room relay block.

Relay(for Magnet Clutch Control)

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Room Temperature Sensor

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