Checking wiring

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Check the engine control module (ECM) and intake air temperature (IAT) sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage, or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal 48 and intake air temperature (IAT) sensor terminal 1 for an intermittent short-circuit to supply voltage. Remedy according to Short-circuit to supply voltage, intermittent faults and for an intermittent open-circuit Open-circuit, intermittent faults .

Check the ground lead between engine control module (ECM) terminal 79 and intake air temperature (IAT) sensor terminal 2 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

Other information

To replace the intake air temperature (IAT) sensor, see Replacing the intake air temperature sensor
To connect the breakout box, see Connecting the breakout box. EMS 2000 .

Fig 1: Identifying Injector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Information