Idle Control System — Troubleshooting Flowchart — Alternator FR Signal (cont'd)
6-67flowchartReferences Section 16 (charging system / alternator) for Alternator Inspection.
1
(From page 6-66)
2
Disconnect "B" connector from ECU only, not the main wire harness.
3
Disconnect the negative battery cable from the battery.
4
Check for continuity between B14 terminal and body ground.
5
Does continuity exist?
YES
Disconnect GRN connector from the alternator.
Disconnect GRN connector from the alternator.
Check for continuity between B14 terminal and body ground.
Does continuity exist?
NO
6
Disconnect GRN connector from the alternator.
7
Connect BLU wire to body ground.
8
Check for continuity between B14 terminal and body ground.
9
Does continuity exist?
NO
Repair open in BLU wire between ECU (B14) and alternator.
YES
See Alternator Inspection (section 16).