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Home >> Suzuki >> 2012 >> Equator Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine General Information & Diagnosis - Qr25DE (3 Of 5) >> DTC P0340: CMP Sensor (PHASE) >> Diagnosis Procedure
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Diagnosis Procedure

DIAGNOSIS PROCEDURE CHART

Step Action YES NO
1  CHECK STARTING SYSTEM 
Turn ignition switch to START position.
Does the engine turn over? 
Does the starter motor operate? 
Yes or No 		 GO TO 2. Check starting system. (Refer to [DIAGNOSIS AND REPAIR WORKFLOW ])
2  CHECK GROUND CONNECTIONS 
  1. Turn ignition switch OFF.
  2. Loosen and retighten two ground screws on the body. Refer to [POWER SUPPLY AND GROUND CIRCUIT CHECK ].
G00538109Courtesy of SUZUKI OF AMERICA CORP.

OK or NG 		 GO TO 3. Repair or replace ground connections.
3  CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT 
  1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
G06444162G06444163Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Turn ignition switch ON.
  2. 3. Check voltage between CMP sensor (PHASE) terminal 1 and ground with SDT or tester.
G06444162G06444163Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Battery voltage 
OK or NG 		 GO TO 5. GO TO 4.
4  DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connectors E2, F32
  • Harness for open or short between camshaft position sensor (PHASE) and ECM
  • Harness for open or short between camshaft position sensor (PHASE) and IPDM E/R
 Repair open circuit, short to ground or short to power in harness or connectors.  
5  CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT 
  1. Turn ignition switch OFF.
  2. Check harness continuity between CMP sensor (PHASE) terminal 3 and ground.

    Continuity should exist. 

  3. Also check harness for short to power.

OK or NG 		 GO TO 7. GO TO 6.
6  DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connector E2, F32
  • Harness for open or short between CMP sensor (PHASE) and ground.
 Repair open circuit or short to power in harness or connectors.  
7  CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
  1. Disconnect ECM harness connector.
  2. Check harness continuity between ECM terminal 14 and CMP sensor (PHASE) terminal 2. Refer to WIRING DIAGRAM .

    Continuity should exist. 

  3. Also check harness for short to ground and short to power.

OK or NG 		 GO TO 8. Repair open circuit, short to ground or short to power in harness or connectors.
8  CHECK CAMSHAFT POSITION SENSOR (PHASE) 
Refer to [P0340 CMP SENSOR (PHASE) ].
OK or NG 		 GO TO 9. Replace camshaft position sensor (PHASE). Refer to TIMING CHAIN: EXPLODED VIEW .
9  CHECK CAMSHAFT (INTAKE) 
Check the following.
G00538118Courtesy of SUZUKI OF AMERICA CORP.

  • Accumulation of debris to the signal plate of camshaft rear end
  • Chipping signal plate of camshaft rear end

OK or NG 		 GO TO 10. Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to CAMSHAFT: REMOVAL AND INSTALLATION .
10  CHECK INTERMITTENT INCIDENT 
Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]		 INSPECTION END   
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