Problem: The engine fails to crank over
when the ignition is switched to the START position.
Details: The first thing the technician did
was to connect a scan tool. He retrieved a B1829 (Starter battery
circuit component error) diagnostic trouble code (DTC).
Next, he pulled the starter relay (see image for location) out of
the fuse box and measured voltage between relay socket terminals
85 and 86 (control coil) while the ignition was in the crank
There was battery voltage at terminals 85 and 86, and on terminal
30. He connected a fused jumper wire to bridge terminal 30 to
terminal 87. The starter engaged so he deduced that the relay was
Confirmed Repair: The technician replaced
the starter relay and cleared the DTC. The new relay restored
normal cranking, the engine started, and no code returned.