Diagnostic Procedure (Using DRB-II)

NOTE: When using diagnostic code charts, DO NOT skip any steps in chart or incorrect diagnosis may result. Always check related Technical Service Bulletins (TSBs).

Refer to RETRIEVING CODES (USING DRB-II) to retrieve fault codes. If fault codes are NOT present and DRB-II is used, proceed to one of the following tests:

Go to NO START TEST 1 (NS-1) chart if a no-start condition exists or engine stalls after start-up. Perform indicated VERIFICATION PROCEDURE chart (when provided) after repairs. Ensure charts apply to engine being tested.
Go to DRIVEABILITY TEST 1 (DR-1) chart if engine runs but has performance problems. Perform indicated VERIFICATION TEST chart (when provided) after repairs. Ensure charts apply to engine being tested.