15-Power Feed to Auto Shutdown Relay

1. Turn ignition switch Off, then disconnect 4-way connector from auto shutdown relay and inspect connector for terminal damage.
2. Measure voltage at red wire terminal of auto shutdown relay.
3. If voltmeter indicates less than 10 volts, proceed to step 4. If voltmeter indicates at least 10 volts, proceed as follows:
a. Connect jumper wire between dark green/black wire and red wire at auto shutdown 4-way connector.
b. If fuel pump is running, replace auto shutdown relay, then proceed to Test 16.
c. If fuel pump is not running, check fuel pump fuse in panel and locate and repair open in dark green/black wire in harness, then proceed to Test 16.
4. Inspect fuse link to auto shutdown relay.
5. If fuse link is satisfactory, repair open in red wire from 4-way connector, then proceed to Test 16.
6. If fuse link is blown, disconnect battery and repair white fuse link, then reconnect battery and proceed to step 7.
7. Disconnect fuel pump connector from fuel tank, then put diagnostic read-out tool in ohms mode and connect ohm probe to dark green/black wire of auto shutdown connector.
8. If ohmmeter indicates 9K ohms or more, replace fuel pump unit and proceed to Test 16.
9. If ohmmeter indicates less than 9K ohms, disconnect ignition coil (+) wire.
10. If ohmmeter indicates open circuit, replace shorted ignition coil, then proceed to Test 16.
11. If ohmmeter does not indicate an open circuit, disconnect fuel injector connector from throttle body.
12. If ohmmeter now indicates an open circuit, repair shorted injector or throttle body harness, then proceed to Test 16.
13. If ohmmeter does not indicate an open circuit, disconnect oxygen sensor electrical connector.
14. If ohmmeter now indicates an open circuit, replace oxygen sensor, then proceed to Test 16.
15. If ohmmeter does not indicate an open circuit, repair short to ground in dark green/black wire from engine harness or chassis harness to tank, then proceed to Test 16.