Central Electronic Module (Cem) & Accessory Electronic Module (Aem) Diagnostic Trouble Codes: Wiring Volvo V70 II

Checking components and wiring

Check the power supply cable between accessory control module terminal #B6 and the back-up (reversing) warning system connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access or replace the back-up (reversing) warning system, see «Back-up warning sensor, replacing»(ref-441132-S13068211562011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

Scheme 294

1. Continue Refer to «Verification»(ref-406910-S34436916422011070100000)

Check the power supply cable between accessory control module terminal #B6 and the back-up (reversing) warning system connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access or replace the back-up (reversing) warning system, see «Back-up warning sensor, replacing»(ref-441132-S13068211562011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S27759672262011070100000)

Check the signal cable for the back-up (reversing) warning system buzzer. Check between accessory control module terminal #B7 and the back-up (reversing) warning system connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access or replace the back-up (reversing) warning system, see «Back-up warning sensor, replacing»(ref-441132-S13068211562011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S08739186452011070100000)

Check the signal cable for the back-up (reversing) warning system buzzer. Check between accessory control module terminal #B7 and the back-up (reversing) warning system connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access or replace the back-up (reversing) warning system, see «Back-up warning sensor, replacing»(ref-441132-S13068211562011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S15463018382011070100000)

Check the signal cable to the relay for the electric engine block heater. Check between accessory control module terminal #B5 and the connector for the relay. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access and replace the relay for the electric engine block heater, see «Relay electrical engine block heater, replacing»(ref-441122-S20227168082011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S39560451162011070100000)

Check the signal cable for the relay for the electric engine block heater. Check between accessory control module terminal #B5 and the connector for the relay. Check for a short-circuit to supply voltage. Check for an open-circuit.

Check the ground lead for the relay for the electric engine block heater. Check between accessory control module terminal #B4 and the connector for the relay. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access and replace the relay for the electric engine block heater, see «Relay electrical engine block heater, replacing»(ref-441122-S20227168082011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S30827361292011070100000)

Check the power supply cable between accessory control module terminal #B1 and the remote start unit connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access or replace the remote start unit, see «Replacing the remote starter unit»(ref-441122-S23150757372011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S28117280082011070100000)

Check the signal cable to the remote start unit. Check between accessory control module terminal #B3 and the remote start unit connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access the remote start unit, see «Replacing the remote starter unit»(ref-441122-S23150757372011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S05770354302011070100000)

Check the signal cable for the remote start unit. Check between accessory control module terminal #B3 and the remote start unit connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To access the remote start unit, see «Replacing the remote starter unit»(ref-441122-S23150757372011121500000)
5. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S33662590702011070100000)

Check the signal cable for alarm output P0. Check between accessory control module terminal #B15 and the alarm unit connector. Check for a short-circuit to ground. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S32425954282011070100000)

Check the signal cable for alarm output P0. Check between accessory control module terminal #B15 and the alarm unit connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S37367395242011070100000)

Check the signal cable for alarm output P1. Check between accessory control module terminal #B16 and the alarm unit connector. Check for a short-circuit to ground. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S09159944622011070100000)

Check the signal cable for alarm output P1. Check between accessory control module terminal #B16 and the alarm unit connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S01706482992011070100000)

Check the signal cable for the alarm output S0. Check between accessory control module terminal #B33 and the alarm unit connector. Check for a short-circuit to ground. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S20876879862011070100000)

Check the signal cable for alarm output S0. Check between the accessory control module terminal #B33 and the alarm unit connector. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S00095906952011070100000)

Check the signal cable for the alarm output S1. Check between accessory control module terminal #B34 and the alarm unit connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S32001094402011070100000)

Check the signal cable for the alarm output S1. Check between accessory control module terminal #B34 and the alarm unit connector. Check for a short-circuit to ground. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S16119904672011070100000)

Check the signal cable (carphone mute). Check between accessory control module terminal #B12 and the radio connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S20823212522011070100000)

Check the signal cable (carphone mute). Check between accessory control module terminal #B12 and the radio connector. Check for a short-circuit to supply voltage. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the Accessory Electronic Module (AEM) and connector, see «Accessory electronic module (AEM), replacing»(ref-441132-S40916385662011121500000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S37993438092011070100000)

Check the signal cable (rheostat). Check between accessory control module terminal #B13 and the connector for the radio. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S33327118872011070100000)

Check the signal cable (speed). Check between accessory control module terminal #B14 and the connector for the radio. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S08459192942011070100000)

Check the power supply cable between accessory control module terminal #B30 and the antenna amplifier connector. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S05605316662011070100000)

Check the power supply cable between accessory control module terminal #B30 and the antenna amplifier connector. Check for a short-circuit to supply voltage. Check for an open-circuit.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box. Accessory electronic module»(ref-406825-S01828266742011070100000)
2. To access or replace the accessory electronic module and connector, see «Replacing the accessory electronic module»(ref-406828-S17249222382011070100000)
3. For information about signals, see «Signal description. Accessory electronic module (AEM)»(ref-406827-S35003813772011070100000)
4. To fault-trace wiring and terminals see «Contents»(ref-406811-S37635188302011070100000)

1. Continue Refer to «Verification»(ref-406910-S27658861842011070100000)

Checking wiring

Check the cable between central electronic module (CEM) connector #1B and ignition switch S-supply #3 for an intermittent open-circuit according to Open-circuit, intermittent faults and for a short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

1. The voltage must be the same as battery voltage if the key is in positions 0, I, II or III.
2. To access / replace the central electronic module (CEM) connector, see «Central electronic module (CEM), replacing»(ref-441112-S09232038292011121500000)
3. To connect the breakout box, see «Connecting the breakout box»(ref-406825-S28150951272011070100000)
4. For further information about signals and other values, see «Signal specification»(ref-406816-S38647568162011070100000)

Scheme 295

1. Continue OKAY: Troubleshooting has been completed.

Check the cable between central electronic module (CEM) connector #2B and ignition switch connector X-supply #6 for an intermittent open-circuit according to Open-circuit, intermittent faults and for a short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

1. The voltage must be 0 V if the key is in position 0 or III.
2. To access / replace the central electronic module (CEM) connector, see «Central electronic module (CEM), replacing»(ref-441112-S09232038292011121500000)
3. For the intermediate junction point, see appropriate SYSTEM WIRING DIAGRAM article.
4. To connect the breakout box, see «Connecting the breakout box»(ref-406825-S28150951272011070100000)
5. For further information about signals and other values, see «Signal specification»(ref-406816-S38647568162011070100000)

1. Continue OKAY: Troubleshooting has been completed.

Check the cable between central electronic module (CEM) connector #3B and ignition switch connector 15A #1 for an intermittent open-circuit according to Open-circuit, intermittent faults and for a short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

1. The voltage must be the same as battery voltage if the key is in positions II or III.
2. To access / replace the central electronic module (CEM) connector, see «Central electronic module (CEM), replacing»(ref-441112-S09232038292011121500000)
3. For the intermediate junction point, see appropriate SYSTEM WIRING DIAGRAM article
4. To connect the breakout box, see «Connecting the breakout box»(ref-406825-S28150951272011070100000)
5. For further information about signals and other values, see «Signal specification»(ref-406816-S38647568162011070100000)

1. Continue OKAY: Troubleshooting has been completed.

Check the cable between central electronic module (CEM) connector #3B and ignition switch connector 15A #1 for an intermittent open-circuit according to Open-circuit, intermittent faults and for a short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

1. The voltage must be 0 V if the key is in position 0 or I.
2. To access / replace the central electronic module (CEM) connector, see «Central electronic module (CEM), replacing»(ref-441112-S09232038292011121500000)
3. For the intermediate junction point, see appropriate SYSTEM WIRING DIAGRAM article.
4. To connect the breakout box, see «Connecting the breakout box»(ref-406825-S28150951272011070100000)
5. For further information about signals and other values, see «Signal specification»(ref-406816-S38647568162011070100000)

1. Continue OKAY: Troubleshooting has been completed.

Check the cable between central electronic module (CEM) connector #20A and ignition switch connector #50 for an intermittent open-circuit according to Open-circuit, intermittent faults and for a short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

1. The voltage must be 0 V if the key is in position 0, I or II.
2. To access / replace the central electronic module (CEM) connector, see «Central electronic module (CEM), replacing»(ref-441112-S09232038292011121500000)
3. For the intermediate connector, see appropriate SYSTEM WIRING DIAGRAM article.
4. To connect the breakout box, see «Connecting the breakout box»(ref-406825-S28150951272011070100000)
5. For further information about signals and other values, see «Signal specification»(ref-406816-S38647568162011070100000)

1. Continue OKAY: Troubleshooting has been completed.