Engine Control Module (ECM) Diagnostic Trouble Codes - 3 of 3: Wiring Volvo V40 I рестайлинг

Checking components and wiring

Check that the resistance between relay terminals 1 and 2 is approximately 75 ohms at +20 °C.

Check the signal cable between engine control module (ECM) terminal 38 (half speed), terminal 8 (full speed), terminal 69 (air conditioning (A/C) cooling fan) and relay terminal 2 for an intermittent short-circuit to supply voltage and remedy according to Short-circuit to supply voltage, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Scheme 163

Scheme 164

Scheme 165

1. Continue Refer to «Information»(ref-441352-S34038339612011121500000)

Checking wiring

Check that the resistance between relay terminals #1 and #2 is approximately 75-105 ohms at +20 °C.

Check the signal cable between engine control module (ECM) terminal #38 (half speed), terminal #8 (full speed) and terminal #69 (air conditioning (A/C) cooling fan) and relay terminal #2. Check for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults . Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Continue Refer to «Information»(ref-441352-S19139852692011121500000)

Check that the resistance between relay terminals #1 and #2 is approximately 75-105 ohms at +20 °C.

Check the signal cable between engine control module (ECM) terminal #38 (half speed), terminal #8 (full speed) and terminal #69 (air conditioning (A/C) cooling fan) and relay terminal #2. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Continue Refer to «Information»(ref-441352-S08393624912011121500000)

Check that the resistance between relay terminals #1 and #2 is approximately 75-105 ohms at +20 °C.

Check the signal cable between engine control module (ECM) terminal #38 (half speed), terminal #8 (full speed) and terminal #69 (air conditioning (A/C) cooling fan) and relay terminal #2. Check for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults . Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Remedy if necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Continue Refer to «Information»(ref-441352-S14313114362011121500000)

Check that the resistance between relay terminals 1 and 2 is approximately 75 ohms at +20 °C.

Check the signal cable between engine control module (ECM) #38 (half speed), #8 (full speed), #69 (air conditioning (A/C) cooling fan) and relay terminal 2 for an intermittent short-circuit to supply voltage and remedy according to Short-circuit to supply voltage, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Scheme 166

1. Continue Refer to «Information»(ref-441352-S09293182292011121500000)

Check that the resistance between idle air control (IAC) valve terminals 1 and 2 is approximately 10 ohms at +20 °C.

Check the signal cable between engine control module (ECM) terminal 64 and idle air control (IAC) valve terminal 2 for an intermittent short-circuit to supply voltage. Remedy according to Short-circuit to supply voltage, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Continue Refer to «Information»(ref-441352-S23930203522011121500000)

1. Ignition off. Check that the resistance between idle air control (IAC) valve terminals 1 and 2 is approximately 10 ohms at +20 °C. Check signal cable between engine control module (ECM) terminal 64 and idle air control (IAC) valve terminal 2 for an intermittent short-circuit to ground. Remedy according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Continue Refer to «Information»(ref-441352-S30922075342011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damaged or loose terminal pins.

Check the signal cable between the engine control module (ECM) terminal #20 and DSA control module terminal 15 for an intermittent open-circuit and remedy according to Open-circuit, intermittent faults .

Scheme 167

1. Continue Refer to «Information»(ref-441352-S26803465522011121500000)

Check the engine control module (ECM) and DSA control module connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damaged or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal #20 and DSA control module terminal #15. Check for an open-circuit according to Open-circuit, permanent faults . Remedy if necessary.

1. Continue Refer to «Verification»(ref-441352-S28839093602011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damaged or loose terminal pins.

Check the signal cable between the engine control module (ECM) #20 and DSA control module terminal 15 for an intermittent open-circuit and remedy according to Open-circuit, intermittent faults .

1. Continue Refer to «Information»(ref-441352-S13305248482011121500000)

Checking wiring and terminals

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between DSA control module terminal #1 and the fuse. Check for an intermittent open-circuit according to Open-circuit, intermittent faults .

FENIX 5.1

1. Check the cable between DSA control module terminal #9 and engine control module (ECM) terminal #31. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

EMS 2000

1. Check the cable between DSA control module terminal #9 and ground terminal 31/25. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

Other information

1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000)
2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000)
3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Scheme 168

1. Continue Refer to «Information»(ref-441352-S42191655142011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damaged or loose terminal pins.

Check the signal cable between the engine control module (ECM) terminal #20 and DSA control module terminal 15 for an intermittent open-circuit and remedy according to Open-circuit, intermittent faults .

1. Continue Refer to «Information»(ref-441352-S23073761822011121500000)

Check the cable between engine control module (ECM) terminal #20 and DSA control module terminal #15. Check for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

1. Continue Refer to «Verification»(ref-441352-S30924814372011121500000)

Check the cable between engine control module (ECM) terminal #20 and DSA control module terminal #15. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults . Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

1. Continue Refer to «Verification»(ref-441352-S30924814372011121500000)

Checking wiring and connectors

1. Ignition off. Check the engine coolant temperature (ECT) sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the engine coolant temperature (ECT) sensor and engine control module (ECM) terminals visually according to «Check terminals visually»(ref-441291-S04910850932011121500000) . Remedy as necessary. Try a new engine coolant temperature (ECT) sensor if no fault is found during the above fault-tracing. Other information: To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) To replace the engine coolant temperature (ECT) sensor, see «Replacing the engine coolant temperature (ECT) sensor»(ref-441342-S14721213142011121500000) .

1. Continue Refer to «Information»(ref-441352-S38867240812011121500000)

Check that the resistance between system relay terminals 3 and 5 is infinite.

Check the power supply cable between engine control module (ECM) terminal #66 and the system relay base terminal 3 for a short-circuit to supply voltage and remedy according to Short-circuit to supply voltage, intermittent faults .

Check the power supply cable between the system relay terminal 3 and injectors terminal 1, ignition coils terminal 2, idle air control valve terminal 1, turbocharger (TC) control valve terminal 1, mass air flow (MAF) sensor terminal 3 and heated oxygen sensors (HO2S) terminal 1 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Checking the wiring and component

1. Ignition off. Check the cable at system relay base terminal #5 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Try a new system relay if no fault is found during the above fault-tracing. Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the system relay, see «Engine compartment»(ref-441344-S14012564022011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Information»(ref-441352-S17808093622011121500000)

1. Ignition off. Check the voltage between ground and system relay base terminal #5. The voltage must be approximately 0 V when the system relay is disconnected. If the voltage is above approximately 0 volts, check the cable at system relay base terminal #5. Check for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000) . Try a new system relay if no fault is found during the above fault-tracing. Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the system relay, see «Engine compartment»(ref-441344-S14012564022011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Verification»(ref-441352-S01571062422011121500000)

Check the signal cable between engine control module (ECM) terminal #66 and system relay terminal 3 for an intermittent short-circuit to ground and remedy according to Short-circuit to ground, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

1. Ignition off. Check at the battery that the battery voltage is not too low. Check the system relay and system relay base. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Check fuse 12 the integrated relay / fusebox in the engine compartment. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Check the cable between system relay base terminal #3 and fuse 12 in the integrated relay / fusebox in the engine compartment. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check the cable from system relay base terminal #5. Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the system relay, see «Engine compartment»(ref-441344-S14012564022011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Information»(ref-441352-S21779829232011121500000)

1. Ignition off. Check at the battery that the battery voltage is not too low. Check the system relay and system relay base. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check fuse 12 the integrated relay / fusebox in the engine compartment. If the fuse is blown, check the circuit for the fuse for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check the cable between system relay base terminal #3 and fuse 12 in the integrated relay / fusebox in the engine compartment. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . HINT: The voltage between ground and system relay base terminal #3 must be approximately 12 volt. Check the cable from system relay base terminal #5. Check for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Try a new system relay if no fault is found during the above fault-tracing. Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the system relay, see «Engine compartment»(ref-441344-S14012564022011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Verification»(ref-441352-S29028243622011121500000)

1. Ignition off. Check the cable between control module terminal #72 and connector terminal #3 on boost pressure sensor 1. Check for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000) . Check the ground lead between control module terminal #79 and connector terminal #1 on boost pressure sensor 1. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Try a new boost pressure sensor 1 if no fault is found during the above fault-tracing. Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) See «Boost pressure sensor 1, replacing»(ref-441339-S06643094402011121500000) See «Signal specification»(ref-441338-S16642011902011121500000)

1. Continue Refer to «Verification»(ref-441352-S35392630692011121500000)

Check the connector on boost pressure sensor 1 and the engine control module (ECM). Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check the signal cable between control module terminal #72 and connector terminal #3 on boost pressure sensor 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 .

Check the power supply cable between connector terminal #2 on boost pressure sensor 1 and control module terminal #74. Check for an open-circuit according to Open-circuit, intermittent faults .

Other information

1. To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
2. See «Boost pressure sensor 1, replacing»(ref-441339-S06643094402011121500000)
3. See «Signal specification»(ref-441338-S16642011902011121500000)

1. Continue Refer to «Information»(ref-441352-S16327660942011121500000)

Check the signal cable between control module terminal #72 and connector terminal #3 on boost pressure sensor 1. Check for an open-circuit according to Open-circuit, permanent faults . Check for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Check the power supply cable between connector terminal #2 on boost pressure sensor 1 and control module terminal #74. Check for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Try a new boost pressure sensor 1 if no fault is found during the above fault-tracing.

Other information

1. To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
2. See «Boost pressure sensor 1, replacing»(ref-441339-S06643094402011121500000)
3. See «Signal specification»(ref-441338-S16642011902011121500000)

1. Continue Refer to «Verification»(ref-441352-S15312742582011121500000)

1. Ignition off. Check the connectors for the boost pressure sensor and the control module. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Remedy as necessary.

1. Continue Refer to «Checking the signals for the boost pressure sensors»(ref-441352-S39428194202011121500000)

1. Ignition off. Check the connector on the leak diagnostic pump. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the signal cable between engine control module (ECM) terminal #41 and leak diagnostic pump terminal #4. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Check the power supply cable between system relay terminal #5 (87) and leak diagnostic pump terminal #2. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Remedy as necessary. Try a new leak diagnostic pump if no fault is found during the above fault-tracing. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the leak diagnostic pump, see «Replacing the leak diagnostic pump»(ref-441337-S19530588282011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Verification»(ref-441352-S33262994352011121500000)

1. Ignition off. Check the connector on the leak diagnostic pump for loose connections according to «Loose connections (terminals)»(ref-441291-S22081329982011121500000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Check the signal cable between engine control module (ECM) terminal 41 and leak diagnostic pump terminal 4 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access / replace the leak diagnostic pump, see «Replacing the leak diagnostic pump»(ref-441337-S19530588282011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Information»(ref-441352-S05707269552011121500000)

Checking the wiring

1. Ignition off. Check the connector on the leak diagnostic pump. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the signal cable between engine control module (ECM) terminal #41 and leak diagnostic pump terminal #4. Check for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000) . Remedy as necessary. Try a new leak diagnostic pump if no fault is found during the above fault-tracing. Other information: To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the leak diagnostic pump, see «Replacing the leak diagnostic pump»(ref-441337-S19530588282011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Verification»(ref-441352-S26776803042011121500000)

1. Ignition off
2. Disconnect the connectors. Check the connector on the camshaft reset valve for loose connections according to «Loose connections (terminals)»(ref-441291-S22081329982011121500000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Check the signal cable between engine control module (ECM) terminal 41 and leak diagnostic pump terminal 4 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check the power supply cable between system relay terminal 5 (87) and leak diagnostic pump terminal 2 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access / replace the leak diagnostic pump, see «Replacing the leak diagnostic pump»(ref-441337-S19530588282011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Information»(ref-441352-S14860764802011121500000)

1. Ignition off. Check the connector on the leak diagnostic pump. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the signal cable between engine control module (ECM) terminal #41 and leak diagnostic pump terminal #4. Check for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check the power supply cable between system relay terminal #5 (87) and leak diagnostic pump terminal #2. Check for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Try a new leak diagnostic pump if no fault is found during the above fault-tracing. Other information: To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the leak diagnostic pump, see «Replacing the leak diagnostic pump»(ref-441337-S19530588282011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .

1. Continue Refer to «Verification»(ref-441352-S21191023242011121500000)

Check the signal cables between engine control module (ECM) terminals 57 and 27 and transmission control module (TCM) terminals 14 and 27. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults . Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults . Check for a short-circuit to each other and for open-circuits according to Open-circuit, permanent faults . Remedy if necessary.

If no problem is found in above troubleshooting, try changing Transmission control module (TCM).

Scheme 169

1. Continue Refer to «Verification»(ref-441352-S41157835462011121500000)