Component Testing

Relay Test

1. Ignition/Vehicle - Off
2. Remove the component: KR22 Fuel Heater Relay
3. Test for 70 to 110 ohms between the test points: Component terminal 1 & 2
   • If not between 70 and 110 ohms 

     Replace the component: KR22 Fuel Heater Relay

   • Go to next step: If between 70 and 110 ohms 
4. Test for infinite resistance between the test points:
   • Component terminal 3 & 2
   • Component terminal 3 & 1
   • Component terminal 3 & 5
   • Component terminal 2 & 5
   • If less than infinite resistance 

     Replace the component: KR22 Fuel Heater Relay

   • Go to next step: If infinite resistance 
5. Connect a 3 A fused jumper wire between the test points: Component terminal 1 & 12 V

   Connect a jumper wire between the test points: Component terminal 2 & Ground

6. Test for less than 2 ohms between the test points: Component terminal 3 & 5
   • If 2 ohms or greater 

     Replace the component: KR22 Fuel Heater Relay

   • Go to next step: If less than 2 ohms 
7. All OK.