Circuit Diagnosis - Starter Relay

1. Verify relay integrity
^ The starter relay works in conjunction with RKE system to disable the Starter motor until the RKE module acknowledges the "Unlock" transmission from the FOB. Vehicle built without the RKE option enable the starter relay by shorting circuit 625 to ground.
^ Verify relay enable circuitry by back probing both A1 and C2 terminals at the starter relay with doors unlocked by the RKE system and ignition in the Run position with a DVOM to ground. If voltage is present at terminal A1, inspect circuits 625 and 625A for poor connections or opens or RKE module. If no voltage is present at C2, inspect circuit 5A and 5 for poor connections or opens, 30A IGN 3 fuse (UHJB) and ignition switch.
^ Verify relay enable circuitry by back probing both A2 and C1 terminals at the starter relay with doors unlocked by the RKE system and ignition in the "Start" position with a DVOM to ground. If no voltage is present at terminal A2, inspect circuits 5A and 5 for poor connections or opens, 30A IGN 3 fuse (UHJB) and ignition switch.