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Diagnosis Procedure
1.CHECK “B” TERMINAL CONNECTION
  1. Ignition switch OFF.
  2. Check if “B” terminal is clean and tight.
Is the inspection result normal?
.
Repair “B” terminal connection.
 
2.CHECK “B” TERMINAL CIRCUIT
Check voltage between generator “B” terminal and ground.
(+)(-)Voltage (Approx.)
Generator
ConnectorTerminal
F291Ground12V battery voltage
Is the inspection result normal?
.
Check harness for open between generator and fusible link.
 
3.CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)
  1. Start engine, then engine running at idle and warm.
  2. Check voltage between 12V battery positive terminal and generator “B” terminal.
    (+)(-)Voltage (Approx.)
    Generator
    ConnectorTerminal
    12V battery positive terminalF291 Less than 0.2 V
Is the inspection result normal?
“B” terminal circuit is normal. Refer to Work Flow (With EXP-800 NI or GR8-1200 NI) or Work Flow (Without EXP-800 NI or GR8-1200 NI).
Check harness between 12V battery and generator for poor continuity.