Toyota Cressida and Van 1983-1990

Component Testing and Inspection

Print

Due to optional equipment, the number or types of relays or other components will vary by model.

HEATER MAIN RELAY



Continuity
CRESSIDA


Click image to see an enlarged view

Fig. Fig. 1 Using an ohmmeter, test the heater relay continuity-Cressida

  1. Using a suitable ohmmeter, check that there is continuity between terminals 1 and 3.
  2.  
  3. Check that there is continuity between terminals 2 and 4.
  4.  
  5. Check that there is no continuity between terminals 4 and 5.
  6.  
  7. If the continuity is not correct, replace the relay.
  8.  

VAN


Click image to see an enlarged view

Fig. Fig. 2 Using an ohmmeter, test the heater relay continuity-Van

  1. Using a suitable ohmmeter, check that there is continuity between terminals 1 and 3.
  2.  
  3. Check that there is no continuity between terminals 2 and 4.
  4.  
  5. If the continuity is not as specified, replace the relay.
  6.  

Operation
CRESSIDA


Click image to see an enlarged view

Fig. Fig. 3 Inspecting the heater relay operation-Cressida

  1. Apply battery voltage across terminals 1 and 3 of the relay connector.
  2.  
  3. Using a suitable ohmmeter, check that there is continuity between terminals 4 and 5.
  4.  
  5. Check that there is no continuity between terminals 5 and 6.
  6.  
  7. If the operation of the relay is not as just described, replace the relay.
  8.  

VAN


Click image to see an enlarged view

Fig. Fig. 4 Inspecting the heater relay operation-Van

  1. Apply battery voltage across terminals 1 and 3 of the relay connector.
  2.  
  3. Using a suitable ohmmeter, check that there is continuity between terminals 2 and 4.
  4.  
  5. If the operation of the relay is not as just described, replace the relay.
  6.  

BLOWER RESISTOR



CRESSIDA


Click image to see an enlarged view

Fig. Fig. 5 Check the continuity of terminals 5 and 6 of the blower resistor using an ohmmeter-Cressida

  1. Using a suitable ohmmeter, check that there is continuity between terminals 5 and 6.
  2.  
  3. If the continuity is not as specified, replace the resistor.
  4.  

VAN


Click image to see an enlarged view

Fig. Fig. 6 Check the continuity of terminals 2 and 4 of the front heaters blower resistor using an ohmmeter-Van



Click image to see an enlarged view

Fig. Fig. 7 Check the continuity of terminals 2 and 3 of the rear heaters blower resistor using an ohmmeter-Van

  1. Using a suitable ohmmeter, check that there is continuity between terminals 2 and 4 (terminals 2 and 3 on the rear heater blower resistor, if so equipped).
  2.  
  3. If the continuity is not as specified, replace the resistor.
  4.  

NO. 1 AND NO. 2 REAR HEATER SWITCHES





Click image to see an enlarged view

Fig. Fig. 8 Terminal identification for the No. 1 and No. 2 rear heater switch-Van

  1. Using a suitable ohmmeter, check for continuity between the terminals.
  2.  
  3. If the continuity is not as specified, replace the switch.
  4.  

REAR HEATER BLOWER SWITCH





Click image to see an enlarged view

Fig. Fig. 9 Terminal location and testing grid for the rear heater blower switch on Van models

  1. Using a suitable ohmmeter, check for continuity between the terminals.
  2.  
  3. If the continuity is not as specified, replace the switch.
  4.  

HEATER CONTROL CABLE



Adjustment
CRESSIDA
  1. Set the air inlet damper and control lever to the FRESH position.
  2.  
  3. Set the mode selector damper and control lever to the VENT position.
  4.  
  5. Set the air mix damper and control lever to the COOL position.
  6.  
  7. Set the water valve and control lever to the COOL position.
  8.  

Place the water valve lever on the COOL position and while pushing the outer cable in the direction of the COOL position, clamp the outer cable to the water valve bracket.

  1. Move the control levers left and right and check for stiffness or binding through the full range of levers. Adjust as necessary, by repositioning the cable in the adjustment clip.
  2.  

VAN-FRONT HEATER


Click image to see an enlarged view

Fig. Fig. 10 Adjustment clip location for the front heater cable which regulates the air mix damper-Van



Click image to see an enlarged view

Fig. Fig. 11 Adjusting the front heater cable after positioning the water valve-Van

  1. Set the air inlet damper and control lever to the FRESH position.
  2.  
  3. Set the mode selector damper and control lever to the FACE position.
  4.  
  5. Set the air mix damper and control lever to the COOL position.
  6.  
  7. Set the water valve and control lever to the COOL position.
  8.  

Place the water valve lever on the COOL position and while pushing the outer cable in the direction of the COOL position, clamp the outer cable to the water valve bracket.

  1. Move the control levers left and right and check for stiffness or binding through the full range of levers. Adjust as necessary, by repositioning the cable in the adjustment clip.
  2.  

VAN-REAR HEATER


Click image to see an enlarged view

Fig. Fig. 12 Adjusting the rear heater cable which regulates the mode selector damper-Van



Click image to see an enlarged view

Fig. Fig. 13 Adjusting the rear heater cable which regulates the air mix damper-Van

  1. Set the mode selector damper and control lever to the FACE position.
  2.  
  3. Set the air mix damper and control lever to the WARM position.
  4.  
  5. Move the control levers left and right and check for stiffness or binding through the full range of levers. Adjust as necessary, by repositioning the cable in the adjustment clip.
  6.  

ELECTRIC COOLING FAN



The following procedures are to be used on vehicles equipped with a single cooling fan assembly only. If the vehicle is equipped with a dual fan system (one for the radiator and one for the A/C condenser), refer to the A/C condenser fan tests located in .

Operation
TEMPERATURE BELOW 181°F (82°C)
  1. Turn the ignition switch to the ON position. If the fan runs, then check the fan relay and temperature switch. Check for a separated connector or a severed wire between the relay and temperature switch.
  2.  
  3. Disconnect the temperature switch wire and check to see if the fan rotates.
  4.  
  5. If the fan does not move, check the fan relay, fan motor, ignition relay and fuse. Check for a short circuit between the fan relay and temperature switch.
  6.  

TEMPERATURE ABOVE 194°F (90°C)
  1. Start the engine and raise the engine rpm so as to raise the engine coolant temperature above 194°F (90°C).
  2.  
  3. Confirm that the fan rotates, if the fan does not rotate, replace the temperature switch.
  4.  

TEMPERATURE SWITCH



  1. Remove the temperature switch, which is usually located in the lower tank of the radiator.
  2.  
  3. Place the switch into a suitable container of coolant which is at or above 194°F (90°C). Using a suitable ohmmeter, check that there is no continuity when the coolant temperature is above 194°F (90°C).
  4.  
  5. Place the switch into a container of coolant of which the temperature is below 181°F (83°C). Using a suitable ohmmeter, check that there is continuity when the coolant temperature is below 181°F (83°C).
  6.  
  7. If the temperature switch fails any part of this inspection, replace it with a new one.
  8.  

IGNITION (OR CUTOUT) RELAY





Click image to see an enlarged view

Fig. Fig. 14 Terminal locations for the ignition or cutout relay

This relay, if so equipped, is usually located in the engine compartment in the relay box.

  1. Using a suitable ohmmeter, measure the resistance between terminals 1 and 2 of the relay connector. The resistance should be 50-80 omega .
  2.  
  3. Connect a 12 volt battery across terminals 1 and 2.
  4.  
  5. Using the ohmmeter, check that there is continuity between terminals 3 and 4.
  6.  
  7. Using the ohmmeter, check that there is no continuity between terminals 4 and 5.
  8.  
  9. If any of the above checks are not as specified, replace the ignition relay.
  10.  

FAN MOTOR RELAY





Click image to see an enlarged view

Fig. Fig. 15 Terminal locations for the fan motor relay

This relay is usually located in the engine compartment in the relay box.

  1. Using a suitable ohmmeter, measure the resistance between terminals 1 and 2 of the relay connector. The resistance should be 50-80 omega .
  2.  
  3. Connect a 12 volt battery across terminals 1 and 2.
  4.  
  5. Using the ohmmeter, check that there is continuity between terminals 3 and 4.
  6.  
  7. If any of the above checks are not as specified, replace the fan motor relay.
  8.  

 
label.common.footer.alt.autozoneLogo