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Engine Cooling Systems: Other Toyota Paseo L40

Cooling System (Mechanical) 2 illustrations ~318 words

COOLING SYSTEM BLEEDING

No special cooling system bleeding procedure is required.

COOLING FAN RELAY NO. 1

  1. Disconnect negative battery cable. Remove cooling fan relay No. 1 relay from fuse/relay box. see scheme 1 Using ohmmeter, ensure continuity exists between specified terminals. (Scheme 3)
  2. To check relay operation, connect battery to specified terminals of cooling fan relay No. 1. (Scheme 3) Using ohmmeter, ensure no continuity exists between specified terminals. (Scheme 3) Replace cooling fan relay No. 1 if defective.

Scheme 3

Scheme 3
Scheme 3
Wiring Harness TerminalsConditionSpecification
No. 1 & GroundContinuity
No. 2 & GroundIgnition OnBattery Voltage
No. 3 & GroundIgnition OnBattery Voltage
No. 5 & 668°F (20°C) (1)2450 Ohms
No. 5 & 6136°F (58°C) (1)630 Ohms
No. 5 & 6176°F (80°C) (1)320 Ohms
No. 7 & GroundIgnition OnBattery Voltage
No. 9 & GroundIgnition OnBattery Voltage
(1) This is the engine compartment temperature.
(1)This is the engine compartment temperature.

COOLING FAN CONTROL MODULE CIRCUIT TEST

Temperature °F (°C)Ohms
68 (20)2450
136 (58)630
176 (80)320

ENGINE COMPARTMENT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS

Temperature °F (°C)Ohms
185 (85)1350
194 (90)1190
203 (95)1050

ECT SENSOR RESISTANCE SPECIFICATIONS

ENGINE COOLANT TEMPERATURE (ECT) SWITCH

  1. Disconnect negative battery cable. Drain cooling system. Disconnect electrical connector and remove ECT switch. See ECT SWITCH LOCATIONS table. Place probe end of ECT switch in container of water.
  2. Using ohmmeter, check for continuity and then no continuity between electrical terminal on ECT switch and switch body while heating water to specified temperatures. See ECT SWITCH CONTINUITY SPECIFICATIONS table. Replace ECT switch if not as specified. Reinstall and fill cooling system.
Application(1) Switch Location
Paseo(2)
(1) For additional information on ECT switch locations see scheme 1 (2) ECT switch is located in coolant housing below distributor and contains a single-pin connector with a Light Green wire.
(1)For additional information on ECT switch locations see scheme 1
(2)ECT switch is located in coolant housing below distributor and contains a single-pin connector with a Light Green wire.

ECT SWITCH LOCATIONS

ApplicationTemperature
Paseo
ContinuityLess Than 181°F (83°C)
No ContinuityGreater Than 201°F (94°C)

ECT SWITCH CONTINUITY SPECIFICATIONS

ENGINE MAIN RELAY

  1. Disconnect negative battery cable. Remove engine main relay from fuse/relay box. see scheme 1 Using ohmmeter, ensure continuity and no continuity exists between specified terminals. (Scheme 4)
  2. To check relay operation, connect battery to specified terminals of engine main relay. (Scheme 4) Using ohmmeter, ensure continuity and no continuity exists between specified terminals. (Scheme 4) Replace engine main relay if defective.

Scheme 4

Scheme 4
Scheme 4

RADIATOR COOLING FAN

  1. Disconnect electrical connector from radiator cooling fan. Connect battery and ammeter to electrical connector on radiator cooling fan.
  2. Radiator cooling fan should operate smoothly and amperage draw should be within specification. See RADIATOR COOLING FAN AMPERAGE DRAW SPECIFICATIONS table.
  3. Replace radiator cooling fan if it fails to rotate smoothly or amperage draw is not within specification. Reinstall electrical connector.
ApplicationAmps
Paseo
A/T8.8-10.8
M/T5.8-7.4

RADIATOR COOLING FAN AMPERAGE DRAW SPECIFICATIONS

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