Central Electronic Module (Cem) Diagnostic Trouble Codes: Wiring Volvo V40 I рестайлинг

Checking components and wiring

1. Ignition off. Check the cable between control module connector B2 #3 (#A3) and connector #2 for the turn signal lamp switch for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Try a new turn signal lamp switch if no fault is found in the cable. Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) . To access / replace the turn signal lamp switch see «Turn signal lamp switch, replace»(ref-441357-S16819503602011121500000) .

1. Continue Refer to «Verification»(ref-441355-S30799369912011121500000)

1. Ignition off. Check the cable between control module connector P #17 (#B37) and connector #9 for the lighting switch and the cable between control module connector P #18 (#B38) and connector #13 for the lighting switch for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Try a new switch if no fault is found in the cables. Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) . To access / replace the switch see «Replacing the light switch»(ref-441357-S30335505522011121500000) .

1. Continue Refer to «Verification»(ref-441355-S18028570752011121500000)

1. Ignition off. Check that fuse 4 in the central electrical unit is intact. Check the cable between control module connector B1 #1 (#A31) and fuse 4 in the passenger compartment fusebox for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) , contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) and for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S29543541372011121500000)

1. Ignition off. Check that fuse 6 the central electrical unit is intact. Check the cable between control module connector P #7 (#B27) and fuse 6 in the passenger compartment fusebox for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) , contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) and for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S40380787472011121500000)

1. Ignition off. Check that fuse 14 in the integrated relay / fusebox in the passenger compartment is intact. Check the cable between control module connector F #10 (#B10) and fuse 14 in the passenger compartment fusebox for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the cable between fuse 14 in the passenger compartment fusebox and windshield wiper motor connector #3, control module connector F #10 (#B10), control module B2 #24 (#A24), control module connector B2 #2 (#A2), control module B1 #12 (#A42) and rear windshield washer fluid pump #1 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check the following cables. Check the cable between control module connector B2 #13 (#A13) and connector #1 for the windshield wiper motor. Check the cable between control module connector B2 #11 (#A11) and connector #3 for the rear windshield wiper motor. Check the cable between control module connector B2 #261 (#A26) and connector #2 for the rear windshield wiper motor. Check these cables for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S00072865582011121500000)

Checking the wiring

Check the cable between control module connector P #12 (#B32) and connector #6 for the fog lamp switch 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»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

Scheme 107

Scheme 108

1. Continue Refer to «Information»(ref-441355-S02432308492011121500000)

Check the cable between control module connector P #12 (#B32) and connector #6 for the fog lamp switch for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults

Try a new switch if no fault is found in the cable.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .
3. To access / replace the switch see «Replacing the light switch»(ref-441357-S30335505522011121500000) .

1. Continue Refer to «Verification»(ref-441355-S01058744902011121500000)

Check the cable between control module connector P #4 (#B24) and connector #13 for the fog lamp switch 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»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S11509700912011121500000)

Check the cable between control module connector P #4 (#B24) and connector #13 for the fog lamp switch for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Try a new switch if no fault is found in the cable.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .
3. To access / replace the switch see «Replacing the light switch»(ref-441357-S30335505522011121500000) .

1. Continue Refer to «Verification»(ref-441355-S39144874472011121500000)

Check the cable between control module connector P #8 (#B28) and connector #2 for the fog lamp switch for an open-circuit according to Open-circuit, intermittent faults , contact resistance and oxidation according to Contact resistance and oxidation and a 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»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S03139778392011121500000)

Check the cable between control module connector P #8 (#B28) and connector #2 for the fog lamp switch for an open-circuit according to Open-circuit, permanent faults , contact resistance and oxidation according to Contact resistance and oxidation and a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Try a new switch if no fault is found in the cable.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .
3. To access / replace the switch see «Replacing the light switch»(ref-441357-S30335505522011121500000) .

1. Continue Refer to «Verification»(ref-441355-S23714105382011121500000)

1. Ignition off. Check the cable between control module connector F terminal #5 (#B5) and the left high beam bulb. Check the cable between control module connector F terminal #14 (#B14) and the right high beam bulb. Check the cable between control module connector P #9 and the relay for auxiliary lamps terminal #5. Check these cables for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) For information about signals see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S31036851812011121500000)

1. Ignition off. Check the cable between control module connector F terminal #5 (#B5) and the left high beam bulb. Check the cable between control module connector F terminal #14 (#B14) and the right high beam bulb. Check the cable between control module connector terminal P #9 and the relay for auxiliary lamps terminal #5. Check these cables for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) For information about signals see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S07882256312011121500000)

1. Ignition off. Check the cable between fuse 28 in the engine compartment fusebox and control module connector F terminal #6 (#B6). Check for an open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Check for short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check the cable between control module connector F terminal #5 (#B5) and the left high beam bulb. Check the cable between control module connector F terminal #14 (#B14) and the right high beam bulb. Check the cable between control module connector P #9 and the relay for auxiliary lamps terminal #5. Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) To access or replace the relay or fuse, see the inside of the cover on the engine compartment relay/fusebox .

1. Continue Refer to «Information»(ref-441355-S38380596062011121500000)

1. Ignition off. Check that fuse 19 the integrated relay / fusebox in the engine compartment is intact. Check the cable between control module connector F #6 (#B6) and fuse 19 for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) , contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) and for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check the cable between control module connector F #5 (#B5) and the left high beam bulb and the cable between control module connector F #14 (#B14) and the right high beam bulb for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S29962486952011121500000)

1. Ignition off. Check that fuse 28 in the integrated relay / fusebox in the engine compartment is intact. Check the cable between control module connector F terminal #6 (#B6) and fuse 28. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check for short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Check the cable between control module connector F terminal #5 (#B5) and the left high beam bulb. Check the cable between control module connector F terminal #14 (#B14) and the right high beam bulb. Check the cable between control module connector terminal P #9 and the relay for auxiliary lamps terminal #5. Check for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) To access or replace the relay or fuse, see the inside of the cover on the engine compartment relay/fusebox .

1. Continue Refer to «Verification»(ref-441355-S07992110342011121500000)

1. Ignition off. Check the following cables: Check the cable between control module connector P #14 (#B34) and the instrument lighting in the combined instrument panel. Check the cable between control module connector P #15 (#B35) and the information center lighting. Check the cable between control module B2 #22 (#A22) and the lighting in the heater control, the cigarette lighter, ECC, the gear selector for the automatic transmission, the switch for the passenger airbag, the switch for central locking, the switch for child proof locks. Check the cable between control module connector B2 #23 (#A23) and the radio lighting. Check all these cables for a short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S39745047802011121500000)

1. Ignition off. Check the following cables: Check the cable between control module connector P #14 (#B34) and the instrument lighting in the combined instrument panel. Check the cable between control module connector P #15 (#B35) and the information center lighting. Check the cable between control module B2 #22 (#A22) and the lighting in the heater control, the cigarette lighter, ECC, the gear selector for the automatic transmission, the switch for the passenger airbag, the switch for central locking, the switch for child proof locks. Check the cable between control module connector B2 #23 (#A23) and the radio lighting. Check all these cables for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S30203940442011121500000)

Check the cable between control module connector B2 #5 (#A5) and the warning lamp for the bulb failure warning sensor in the combined instrument panel (connector B #18 (#48)) 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»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S27809410152011121500000)

Check the cable between control module connector B2 #5 (#A5) and the warning lamp for the bulb failure warning sensor in the combined instrument panel (connector B #18 (#48)) for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S13055167712011121500000)

Check the cable between control module connector B2 #5 (#A5) and the warning lamp for the bulb failure warning sensor in the combined instrument panel (connector B #18 (#48)) for an intermittent open-circuit according to Open-circuit, intermittent faults , contact resistance and oxidation according to Contact resistance and oxidation and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S19696660832011121500000)

Check the cable between control module connector B2 #5 (#A5) and the bulb for the bulb failure warning sensor in the combined instrument panel (connector B #18 (#48)) for an open-circuit according to Open-circuit, permanent faults , contact resistance and oxidation according to Contact resistance and oxidation and for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Check that the bulb for the bulb failure warning sensor is intact.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) .
2. For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S16189239442011121500000)

1. Ignition off. Check the cable between control module connector P #7 (#B27) and fuse 6 in the passenger compartment fusebox for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) . Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Information»(ref-441355-S28326955642011121500000)

1. Ignition off. Check that the battery voltage is normal at the battery. Check the cable between control module connector P #7 (#B27) and fuse 6 in the passenger compartment fusebox for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box»(ref-441300-S21187382202011121500000) . For information about signals, see «Signal specification»(ref-441301-S11047559212011121500000) .

1. Continue Refer to «Verification»(ref-441355-S33808316532011121500000)