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Home >> Volvo >> 2008 >> S40 T-5, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Electronic Control Module (ECM) Diagnostic Trouble Codes - 2 Of 3 (644 Body)) >> ECM-38: Ignition Coil 1. Signal Too Low. Intermittent Fault (B4204T3; 2004) >> Signal too low. Intermittent fault >> Checking wiring

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 signal cable between engine control module (ECM) terminal #32 (ECM-38) or terminal #1 (ECM-3A) and ignition coil terminal 1. Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Check for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults . Remedy if necessary.

Other information 

Fig 1: Identifying Outside Temperature Sensor Connector Terminal 2
GLL118164Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying EMS2000
GLL111998Courtesy of VOLVO CARS OF NORTH AMERICA.