Main Relay (Computer/Fuel System): Testing and Inspection

EFI MAIN RELAY INSPECTION

Junction Block No. 2 (J/B2) Is On The Left Side Of The Engine Compartment:

1. REMOVE EFI MAIN RELAY.
2. INSPECT EFI MAIN RELAY.
(NIPPONDENSO)
A. Inspect relay continuity



(a) Using an ohmmeter, check that there is continue between terminals 1 and 2.
(b) Check that there is no continuity between terminals 3 and 5.
- If continuity is not as specified, replace the relay.
B. Inspect relay operation
(a) Apply battery voltage across terminals 1 and 2.



(b) Using an ohmmeter, check that there is continuity between terminals 3 and 5.
- If operation is not as specified, replace the relay.
3. INSPECT EFI MAIN RELAY.

(BOSCH)
A. Inspect relay continuity



(a) Using an ohmmeter, check that there is continuity between terminals 86 and 85.
(b) Check that there is no continuity between terminals 30 and 87.
- If continuity is not as specified, replace the relay.
B. Inspect relay operation



(a) Apply battery voltage across terminals 86 and 85.
(b) Using an ohmmeter, check that there is continuity between terminals 30 and 87.
- If operation is not as specified, replace the relay.
4. REINSTALL EFI MAIN RELAY.