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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 9 Of 11 >> ECM-644A: Camshaft Reset Valve. Slow Control. Intermittent Fault (B6284T; 1999-2001) >> Slow regulation >> Checking the components and wiring

Checking the components and wiring

Check the resistance on camshaft reset valve between terminals #1 and #2. Resistance must be approximately 3.7 Ω.

Check the signal cable between Engine control module (ECM) terminal #A13 and camshaft reset valve terminal #2. Check for an open-circuit, short-circuit to ground and short-circuit to voltage.

Check the power supply cable between system relay terminal #5 and camshaft reset valve terminal #1. Check for an open-circuit.

Remedy as necessary.

Other information 

Fig 1: Identifying Camshaft Reset Valve Terminals
GLL104011Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
GLL100564Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Camshaft Reset Valve
GLL103034Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 



Check the resistance on camshaft reset valve between terminals #1 and #2. Resistance must be approximately 3.7 Ω.

Check the signal cable between Engine control module (ECM) terminal #A13 and camshaft reset valve terminal #2. Check for an open-circuit, short-circuit to ground and short-circuit to voltage.

Check the power supply cable between system relay terminal #5 and camshaft reset valve terminal #1. Check for an open-circuit.

Remedy as necessary.

Other information 

Fig 1: Identifying Camshaft Reset Valve Terminals
GLL104011Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
GLL100564Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Camshaft Reset Valve
GLL103034Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?