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Volvo XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)05 · Powertrain Management
05 · Diagnostics

Engine Control Module: Diagrams (page 45 of 126)

Make
Volvo
Model
XC70
Engine
L5-2.5L Turbo VIN 59 B5254T2
Year
2003
Section
Relays and Modules - Computers and Control Systems › Engine Control Module › Diagrams
Powertrain ManagementDiagram Information and Instructions · page 45 of 126
Engine Control Module: Diagrams (page 45 of 126) – Volvo XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)

Checking female socket terminals and male pin terminals
Greasing female terminals

Inspect terminals visually

NOTE:  When checking the engine control module (ECM), do not remove the control module from the car before the main relay has interrupted the
power supply. This may take up to 4 minutes after the ignition has been switched off and the engine cooling fan (FC) has stopped running.

Inspect the terminals visually when checking, or taking readings from, opened connectors.

Repair wiring and cable terminals as required, using appropriate procedures. 
 
Checks:

-

Check for oxidation. This can cause poor connections in the terminals

-

Check for damage to pins and terminals. Check that they are properly inserted into the connector. Check that the cable is properly connected to the
pin or terminal. Check pins and terminals particularly carefully

-

Using a loose male connector, test to see if the female connector provides a good contact and that the pin remains in place when the male
connector is pulled lightly

-

Shake the cable lightly and pull on connectors during measurement to locate damage.

Open-Circuit, Intermittent Faults

Open-circuit, Intermittent faults

An open-circuit in a cable will be indicated by the loss of a function (or functions).
Chafed and broken leads are common causes of faults.
Repair wiring and cable terminals as required, using appropriate procedures.
 
Checks:

-

Disconnect the connectors at both ends of the cable.

Check the cables visually according to "Inspect Terminals Visually". 

Connect an ohmmeter between the ends of the cable. The ohmmeter should read approximately 0 [ohm] if there is no open-circuit in the cable.
Shake the cable lightly and pull on connectors during measurement to locate the damage.

Pinch or Ctrl + scroll to zoom. Double-tap to reset.

Parts & tools for this job For 2003 Volvo XC70 2.5L

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