PGM-FI Troubleshooting Flowchart (ECU power supply circuit)
6-93flowchart1
(From page 6-92)
2
Is there battery voltage?
YES
Repair open in BLK wire between the 4P connector and G201.
NO
3
Turn the ignition switch OFF.
4
Connect the PGM-FI test harness between the ECU and connector (page 6-19).
5
Turn the ignition switch ON.
6
Measure voltage between A6 (+) terminal and A18 (-) terminal.
7
Is there battery voltage?
YES
Repair open in GRN wire between ECU (A6) and the 4P connector.
NO
8
Measure voltage between A17 (+) terminal and A18 (-) terminal.
9
Is there battery voltage?
YES
Substitute a known-good ECU and recheck. If prescribed voltage is now available, replace the original ECU.
Substitute a known-good ECU and recheck. If prescribed voltage is now available, replace the original ECU.
(To page 6-94)
NO
10
Inspect No. 14 fuse.
11
Is No. 14 fuse OK?
NO
Replace fuse.
YES
Repair open in BLK/YEL wire between ECU (A17) and No. 14 fuse.