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Diagnosis Procedure

Regarding Wiring Diagram information, refer to [STARTING SYSTEM: WIRING DIAGRAM [VQ40DE WITH CLUTCH INTERLOCK CANCEL SWITCH] ], [STARTING SYSTEM: WIRING DIAGRAM [VQ40DE WITHOUT CLUTCH INTERLOCK CANCEL SWITCH] ] or [STARTING SYSTEM: WIRING DIAGRAM [QR25DE] ].

CAUTION: Perform diagnosis under the condition that the engine cannot start by the following procedure.
  1. Remove fuel pump fuse.
  2. Crank or start the engine (where possible) until the fuel pressure is depleted.
DIAGNOSIS PROCEDURE CHART

Step Action YES NO
1  CHECK TERMINAL 2 POWER SUPPLY VOLTAGE 
  1. Turn ignition switch OFF.
  2. Make sure that starter motor connector E210 terminal 2 connection is clean and tight.
  3. Check voltage between starter motor connector E210 terminal 2 and ground.
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G06444614G06444615Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Is there battery voltage present? 		 GO TO 2 Check harness between battery and starter motor for open circuit.
2  CHECK BATTERY CABLE (VOLTAGE DROP TEST) 
  1. Shift the transmission into park or neutral.
  2. Depress the clutch pedal if the vehicle is equipped with M/T.
  3. Check voltage between battery positive terminal and starter motor connector E210 terminal 2 while cranking the engine.
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G00525997G00525998

Is the voltage drop less than 0.2V? 		 GO TO 3 Check harness between the battery and the starter motor for high resistance.
3  CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST) 
Check voltage between starter motor case and battery negative terminal while cranking the engine.
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G00525999G00526000

Is the voltage drop less than 0.2V? 		 Terminal 2 circuit is OK. Further inspection necessary. Refer to [DIAGNOSIS AND REPAIR WORKFLOW ]. Check the starter motor case to engine mounting for high resistance.
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