Diagnosis Procedure

Regarding Wiring Diagram information. Refer to WIRING DIAGRAM .

1. CHECK "L" TERMINAL CONNECTION
   
   
   1. Turn ignition switch OFF.
   2. Check if "L" terminal is clean and tight.

   Is the inspection result normal?

   YES 

   GO TO STEP 2. 

   NO 

   Repair "L" terminal connection. Confirm repair by performing complete Charging system test using EXP-800 NI or GR8-1200 NI (if available). Refer to applicable Instruction Manual for proper testing procedures.

2. CHECK "L" TERMINAL CIRCUIT (OPEN)
   
   
   1. Disconnect the generator connector.
   2. Apply ground to generator harness connector terminal.
   3. Check condition of the charge warning lamp with the ignition switch in the ON position.

      Generator		Ground	Condition
      Connector	Terminal		Ignition switch position	Charge warning lamp
      F7	2		ON	Illuminate

   Does it illuminate?

   YES 

   "L" 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) .

   NO 

   GO TO 3.

3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
   
   
   1. Disconnect the battery cable from the negative terminal.
   2. Disconnect the combination meter connector.
   3. Check continuity between generator harness connector and combination meter harness connector.

      Generator		Combination meter		Continuity
      Connector	Terminal	Connector	Terminal
      F7	2	M24	11	Yes

   is the inspection result normal?

   YES 

   GO TO 4.

   NO 

   Repair or replace the harness or connectors.

4. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
   
   

   Check continuity between combination meter harness connector and fuse block (J/B).

   Combination meter		Fuse block (J/B)		Continuity
   Connector	Terminal	Connector	Terminal
   M24	21	M4	8P	Yes

   Is the inspection result normal?

   YES 

   GO TO 5.

   NO 

   Repair or replace the harness or connectors.

5. CHECK POWER SUPPLY CIRCUIT
   
   
   1. Connect the battery cable to the negative terminal.
   2. Check voltage between combination meter harness connector and ground.

      (+)		(-)	Condition	Voltage (Approx.)
      Combination meter
      Connector	Terminal
      M24	21	Ground	When the ignition switch is in ON position	Battery voltage

   Is the inspection result normal?

   YES 

   Replace the combination meter. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair or replace the harness or connectors.