Rear Electronic Module (REM) & Upper Electronics Module (Uem) Diagnostic Trouble Codes (Xc): Other Volvo V70 II

Checking cable and component

Check connector D for the rear electronic module (REM) and the connector for the inclination sensor module (ISM). Check for contact resistance and oxidation.

Check the communication cable between rear electronic module (REM) connector terminal #26 (#D26) and inclination sensor module (ISM) connector terminal #2. Check for an open-circuit.

Check the cable between inclination sensor module (ISM) connector terminal #5 and the ground terminal. Check for open-circuit.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430921-S40351701642011101900000)
2. See «Signal specification»(ref-430923-S36978396402011101900000)
3. Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000)
4. See «Contents»(ref-430909-S26456997912011101900000)

Scheme 1867

Scheme 1868

1. Continue Refer to «Verification»(ref-431020-S26034089772011101900000)

Verification

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 1869

Scheme 1870

Scheme 1871

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Shut all the doors. Activate the alarm. Wait 25 seconds until the car is alarmed
5. Then deactivate the alarm
6. Read off diagnostic trouble codes (DTCs). Check if the status of the diagnostic trouble code (DTC) is intermittent.

Is the status intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S34777943582011101900000)

Fault-tracing information

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Check connector D for the rear electronic module (REM) and the connector for the inclination sensor module (ISM). Check for contact resistance and oxidation.

Check the power cable between rear electronic module (REM) connector terminal #31 (#D31) and inclination sensor module (ISM) connector terminal #1. Check for an open-circuit.

Check the communication cable between rear electronic module (REM) connector terminal #26 (#D26) and inclination sensor module (ISM) connector terminal #2. Check for an open-circuit.

Check the cable between inclination sensor module (ISM) connector terminal #5 and the ground terminal. Check for open-circuit.

Try a new inclination sensor module (ISM) if no fault is found.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430921-S40351701642011101900000)
2. See «Signal specification»(ref-430923-S36978396402011101900000)
3. See «Tilt sensor alarm, replacing»(ref-431006-S30649679772011101900000)
4. Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000)
5. See «Contents»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-431020-S17378063382011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Shut all the doors. Activate the alarm. Wait 25 seconds until the car is alarmed
5. Then deactivate the alarm
6. Read off diagnostic trouble codes (DTCs). Check if the status of the diagnostic trouble code (DTC) is intermittent.

Is the status intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S29868480192011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After the repair it is necessary to check that the fault has been rectified.

Scheme 1872

1. Ignition off.
2. Connect the connectors, install the components, etc. Open the boot lid and lock in the open position by pressing in the lock hinge. Lock the car by remote control. Wait for 25 seconds until the alarm is activated and sound the alarm by releasing the level sensor and turning it.

Is function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S12824490232011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

1. Disconnect connector C from the rear electronic module (REM). HINT: The signal loop runs from rear electronic module (REM) terminal #48 (#C8) to the glass breakage loop in the right-hand rear window, to the glass breakage loop in the left-hand rear window and then to the ground terminal. Check connector C for the rear electronic module (REM) and the terminals for the glass breakage loop. Check for contact resistance and oxidation. Check the glass breakage loop and the intermediate cable between rear electronic module (REM) terminal #48 (#C8) and the ground terminal. Check for an open-circuit. Remedy as necessary. Other information See «Connecting the breakout box»(ref-430921-S40351701642011101900000) See «Signal specification»(ref-430923-S36978396402011101900000) Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000) See «Contents»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-431020-S10145609272011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Shut all the doors. Activate the alarm. Wait 25 seconds until the car is alarmed
5. Then deactivate the alarm
6. Read off diagnostic trouble codes (DTCs). Check if the status of the diagnostic trouble code (DTC) is intermittent.

Is the status intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S31432373392011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

1. Disconnect connector C from the rear electronic module (REM). HINT: The signal loop runs from rear electronic module (REM) terminal #48 (#C8) to the glass breakage loop in the right-hand rear window, to the glass breakage loop in the left-hand rear window and then to the ground terminal. Check the glass breakage loop and the intermediate cable between rear electronic module (REM) terminal #48 (#C8) and the ground terminal. Check for a short-circuit to supply voltage. Remedy as necessary. Other information See «Connecting the breakout box»(ref-430921-S40351701642011101900000) See «Signal specification»(ref-430923-S36978396402011101900000) Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000) See «Contents»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-431020-S40151804852011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Shut all the doors. Activate the alarm. Wait 25 seconds until the car is alarmed
5. Then deactivate the alarm
6. Read off diagnostic trouble codes (DTCs). Check if the status of the diagnostic trouble code (DTC) is intermittent.

Is the status intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S10110290902011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Checking the signal from the trunk lid handle

Note. Only applies to 4-door cars.

1. Ignition on
2. Read off the status from the trunk lid handle. Open and close the trunk lid using the handle. The status should alternate as the handle is affected. The fault is permanent if the status does not change. If the status changes, this indicates an intermittent fault, i. e. the fault was present previously but is not active at the moment.

1. Continue Refer to «Checking cable and component»(ref-431020-S06903749982011101900000)

Disconnect the connector from the lamp housing for the license plate lighting. Check that the button has not stuck in the pressed in position. Check that there is not a short-circuit in the contact breaker for the switch by taking a reading between terminal #1 and ground.

Check the resistance between terminals #1 and #3 on the switch. The resistance must be infinite or near 0 ohm depending on the position of the switch.

Check the signal cable between terminal #43 (#F3) on the connector for the rear electronic module (REM) and terminal #1 on the connector for the lamp housing for the license plate lighting. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430921-S40351701642011101900000)
2. See «Signal specification»(ref-430923-S36978396402011101900000)
3. Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000)
4. See «Contents»(ref-430909-S26456997912011101900000)

Scheme 1873

1. Continue Refer to «Verification»(ref-431020-S15426973922011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the status from the trunk lid handle. Open and close the trunk lid using the handle. The status should alternate as the handle is affected.

Is the status OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S14872518132011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Install the components, connect the connectors, etc. Close the boot lid. Lock the car by remote control. Make sure that the boot lid is correctly locked and that opening works.

Is function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S37817641882011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replacing the relay

Replace the relay, 2/67 (2/87 5DRS).

Activate the relay.

If the function is OK, the cause of the fault was a defective relay (short-circuit in the relay).

Scheme 1874

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S36314801872011101900000)

Scheme 1875

Scheme 1876

1. Remove the relay. Check the relay coil driver circuit for a short-circuit to supply voltage by measuring the voltage at terminal #2 in the relay base. HINT: The voltage between terminal #2 and ground should be approximately 0 V. Replace the control module if the voltmeter displays an incorrect value. Other information See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Verification»(ref-431020-S11010753092011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S30162087862011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Replace relay, 2/87.

Activate the relay.

If the function is OK the cause of the fault was a defective relay (short-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Scheme 1877

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S17671219912011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S25225516372011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Checking the component

Remove the relay 2/67 (2/87 5DRS). Check the relay base switches. Check for contact resistance and oxidation.

Install the relay.

Activate the relay.

If the function is now OK the fault was caused by a contact fault in the relay base.

Was the function OK?

1. YES Refer to «Verification»(ref-431020-S03824704502011101900000)
2. NO Refer to «Replacing the relay»(ref-431020-S10282485222011101900000)

Replace the relay, 2/67 (2/87 5DRS).

Activate the relay.

If the function is now OK, the cause of the fault was a defective relay (short-circuit to ground or an open-circuit in the relay coil).

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the control module for open-circuits»(ref-431020-S26748382072011101900000)

Checking the control module for open-circuits

1. Remove the relay, 2/67 (2/87 5DRS). Check the driver circuit for the relay coil for an open-circuit as follows: activate the relay driver. Measure the voltage between terminals #1 and #2 on the relay base. HINT: The voltage between terminals #1 and #2 should be battery voltage. HINT: If the value deviates excessively, check the voltage between terminal #2 and battery voltage and between terminal #1 and ground. Both should equal battery voltage. HINT: Check for an open-circuit. HINT: Do not forget to check that the power supply to the control module is OK. Other information See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S03824704502011101900000)
2. NO Refer to «Checking the control module for short-circuits»(ref-431020-S04835560702011101900000)

Checking the control module for short-circuits

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

1. Continue Refer to «Verification»(ref-431020-S03824704502011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S01422957632011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Information»(ref-431020-S19422888022011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Remove relay (2/87) and check the relay base switches for contact resistance and oxidation according to Contact resistance and oxidation .

Install the relay.

Activate the relay.

If the function is now OK the fault was caused by a contact fault in the relay base.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES Refer to «Verification»(ref-431020-S30792854292011101900000)
2. NO Refer to «Replacing the relay»(ref-431020-S10238022692011101900000)

Replace relay, 2/87.

Activate the relay.

If the function is now OK, the cause of the fault was a defective relay (short-circuit to ground or an open-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the control module for open-circuits»(ref-431020-S17103541562011101900000)

1. Remove relay 2/87. Check the driver circuit for the relay coil for an open-circuit as follows: Activate the relay driver. Measure the voltage between terminals #1 and #2 on the relay base. For further information about open-circuits, see «Open-circuit, permanent faults»(ref-451698-S19428997892012020900000) . HINT: The voltage between terminals #1 and #2 should be battery voltage. HINT: If the value deviates excessively, check the voltage between terminal #2 and the battery and between terminal #1 and ground. Both should equal battery voltage. HINT: Check for an open-circuit according to «Open-circuit, permanent faults»(ref-451698-S19428997892012020900000) . HINT: Do not forget to check that the power supply to the control module is OK. Other information: To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S30792854292011101900000)
2. NO Refer to «Checking the control module for short-circuits»(ref-431020-S25024899802011101900000)

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Verification»(ref-431020-S30792854292011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S35856379892011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replace relay 2/86.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Verification»(ref-431020-S05078632842011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S40998996592011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replace relay 2/86.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Information»(ref-431020-S02505288142011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Remove relay 2/86 and check the relay base switches for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults .

Install the relay.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Information»(ref-431020-S31103314692011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Remove relay 2/86 and check the relay base switches for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault .

Install a new relay.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Verification»(ref-431020-S39911458732011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the fault was caused by a short-circuit in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S28654910472011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Checking / replacing relay

Replace relay, 2/59.

Activate the relay.

If the function is OK the cause of the fault was a defective relay (short-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Scheme 1878

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S38461077532011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect connectors, install components, etc.
3. Ignition on. Activate relay. If the function is now OK, this means that the fault was caused by a short circuit in the relay driver.

Does it work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S07508369442011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Checking and replacing the relay

Replace the relay, 2/59.

Activate the relay.

If the function is OK, the cause of the fault was a defective relay (short-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S13776141162011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the cause of the fault was a short-circuit to supply voltage in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S33313946752011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Information»(ref-431020-S20253371082011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Remove relay (2/59) and check the relay base switches for contact resistance and oxidation according to Contact resistance and oxidation .

Install the relay.

Activate the relay.

If the function is now OK the fault was caused by a contact fault in the relay base.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES Refer to «Verification»(ref-431020-S16165880892011101900000)
2. NO Refer to «Replacing the relay»(ref-431020-S16557528842011101900000)

Replace relay, 2/59.

Activate the relay.

If the function is now OK, the cause of the fault was a defective relay (short-circuit to ground or an open-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S28101505172011101900000)

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Verification»(ref-431020-S16165880892011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect connectors, install components, etc.
3. Ignition on. Activate relay. If the function is now OK, this means that the fault was caused by a short circuit in the relay driver.

Does it work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S42119876362011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Remove the relay (2/59). Check the relay base switches. Check for contact resistance and oxidation.

Install the relay.

Activate the relay.

If the function is now OK the fault was caused by a contact fault in the relay base.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was the function OK?

1. YES Refer to «Verification»(ref-431020-S20827990472011101900000)
2. NO Refer to «Replacing the relay»(ref-431020-S20186909392011101900000)

Replace the relay, 2/59.

Activate the relay.

If the function is now OK, the cause of the fault was a defective relay (short-circuit to ground or an open-circuit in the relay coil).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S42223107312011101900000)

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .

1. Continue Refer to «Verification»(ref-431020-S20827990472011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the relay. If the function is now OK, the cause of the fault was a short-circuit to supply voltage in the relay driver circuit.

Was the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S33103302472011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Replace relay, 2/58.

Activate the relay.

If the function is OK the cause of the fault was a defective relay (short-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the control module»(ref-431020-S28500111872011101900000)

Checking the control module

1. Remove the relay. Check the relay coil driver circuit for a short-circuit to supply voltage by taking a voltmeter reading at terminal #2 in the relay base. For further information about a short-circuit to supply voltage, see «Short-circuit to supply voltage. Permanent faults»(ref-451698-S16880710822012020900000) . HINT: The voltage between terminal #2 and ground should be approximately 0 V. If the voltmeter displays an incorrect value replace the control module. Other information: To access and replace the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .

1. Continue Refer to «Verification»(ref-431020-S40011825352011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect connectors, install components, etc.
3. Ignition on. Activate relay. If the function is now OK, this means that the fault was caused by a short circuit in the relay driver.

Does it work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S23350399482011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Information»(ref-431020-S07482516052011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Remove relay (2/58) and check the relay base switches for contact resistance and oxidation according to Contact resistance and oxidation .

Install the relay.

Activate the relay.

If the function is now OK the fault was caused by a contact fault in the relay base.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES Refer to «Verification»(ref-431020-S02514069462011101900000)
2. NO Refer to «Replacing the relay»(ref-431020-S17760361832011101900000)

Replace relay, 2/58.

Activate the relay.

If the function is now OK, the cause of the fault was a defective relay (short-circuit to ground or an open-circuit in the relay).

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

Was the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring»(ref-431020-S34813789502011101900000)

Measure the resistance between terminal #2 and ground when the relay driver is active.

The resistance should be high when the relay driver is active.

Replace the control module if the resistance is low.

Other information

1. To access the integrated relay / fusebox in the cargo compartment, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000) .

1. Continue Refer to «Verification»(ref-431020-S02514069462011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect connectors, install components, etc.
3. Ignition on. Activate relay. If the function is now OK, this means that the fault was caused by a short circuit in the relay driver.

Does it work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S26797289242011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the parking lamp. Check that the parking lamp is activated.

Is the parking lamp activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S19893518342011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the parking lamp. Check that the parking lamp is activated.

Is the parking lamp activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S19163201172011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the parking lamp. Check that the license plate lighting is activated.

Is the license plate lighting activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S41759708632011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the rear fog lamp. Check that the rear fog lamp is activated.

Is the rear fog lamp activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S12622883792011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Replace the Rear fog lamp relay (position 2/49). Check the relay terminal, in particular the relay guide (2/49 terminal #2), for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) .
2. To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .
3. When the relay is installed and activated, the voltage at the relay guide (terminal #2) should be 0 V.

1. Continue Refer to «Verification»(ref-431020-S23267111502011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Install the components, connect the connectors, etc.
3. Ignition on. Activate rear fog lamps.

Do the rear fog lamps work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S21307636092011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

1. Check that the rear fog lamp relay (position 2/49) is correctly installed.
2. Remedy as necessary.
3. Ignition on. Activate the rear fog lamps by pressing ON and OFF a few times. Other information: For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) . To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) . When the relay is installed but not activated, the voltage at the relay guide (terminal #2) should be 12 V.

Are the rear fog lamps working?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing the relay»(ref-431020-S03484011882011101900000)

Replace the rear fog lamp relay (position 2/49). Check the relay terminal, in particular the relay guide (2/49 terminal #2), for an open-circuit according to Open-circuit, permanent faults .

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) .
2. To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .
3. When the relay is installed but not activated, the voltage at the relay guide (terminal #2) should be 12 V.

1. Continue Refer to «Verification»(ref-431020-S38559873972011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Install the components, connect the connectors, etc.
3. Ignition on. Activate rear fog lamps.

Do the rear fog lamps work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S20079016372011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Activate the stop lamps. Check that the stop lamps are working.

Are the stop lamps working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S12518718412011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the high mounted stop light comes on when the brake pedal is pressed.

Is the high-level stop lamp working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S10701030392011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the high mounted stop light comes on when the brake pedal is pressed.

Is the high-level stop lamp working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S10793471412011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the stop lamp. Check that the stop lamp is activated.

Is the stop lamp activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S24036143652011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Replace the back-up (reversing) lamp relay (position 2/80). Check the relay terminal, in particular the relay guide (2/80 terminal #2), for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) .
2. To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .
3. When the relay is installed and activated, the voltage at the relay guide (terminal #2) should be 0 V.

1. Continue Refer to «Verification»(ref-431020-S06839966132011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Install the components, connect the connectors, etc.
3. Ignition on. Activate reversing lamps.

Do the reversing lights work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S22932155942011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

1. Check that the back-up (reversing) lamp relay (position 2/80) is correctly installed.
2. Remedy as necessary. Activate the back-up (reversing) lamps by pressing ON and OFF a few times. Other information: For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) . To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) . When the relay is installed and not activated, the voltage at the relay guide should be 12 V.

Do the back-up (reversing) lamps function?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing the relay»(ref-431020-S20880089172011101900000)

Replace the back-up (reversing) lamp relay (position 2/80). Check the relay terminal, in particular the relay guide (2/80 terminal #2), for an open-circuit according to Open-circuit, permanent faults .

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S19121820782011101900000) .
2. To access and replace the relay, see «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-430924-S11839078312011101900000) .
3. When the relay is installed and not activated, the voltage at the relay guide should be 12 V.

1. Continue Refer to «Verification»(ref-431020-S33529607152011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Install the components, connect the connectors, etc.
3. Ignition on. Activate reversing lamps.

Do the reversing lights work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S13365260212011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check the signal from position sensor by clicking on the VCT2000 symbol. The voltage should be between 1.7-3.2V depending on loading and inclination. Check that road surface illumination is normal.

Is the voltage and road surface illumination OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S04907161122011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check the signal from the position sensor for Xenon lamps by clicking the VCT2000 symbol. The voltage must be between 1.7-3.2 V depending on the load and inclination.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S26602402962011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check the signal from position sensor by clicking on the VCT2000 symbol. The voltage should be between 1.7-3.2V depending on loading and inclination. Check that road surface illumination is normal.

Is the voltage and road surface illumination OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S36614909332011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check the signal from the position sensor for Xenon lamps by clicking the VCT2000 symbol. The voltage must be between 1.7-3.2 V depending on the load and inclination.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S00847685732011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the rear axle sensor for the Xenon lamp is calibrated by clicking on the symbol for VCT2000.

Is the rear axle sensor calibrated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S07268072192011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the position sensor for the Xenon lamp is calibrated by clicking on the symbol for VCT2000.

Is the position sensor calibrated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S36853825652011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the position sensor for the Xenon lamp is calibrated. Click on the symbol for VCT2000.

Is the calibration OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S18771067632011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the position sensor for the Xenon lamp is calibrated by clicking on the symbol for VCT2000.

Is the calibration OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S29069622382011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replacing relay

Check the tailgate wiper fuse; replace as necessary.

Replace relay 2/16.

Other information

1. To access the relay/fuse box in the cargo compartment: «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000)

1. Continue Refer to «Information»(ref-431020-S15633254322011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check the tailgate wiper fuse; replace as necessary.

Replace relay 2/16.

Other information

1. To access the relay/fuse box in the cargo compartment: «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000)

1. Continue Refer to «Verification»(ref-431020-S22997974452011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reconnect the components, connectors etc.
3. Ignition on
4. Activate the relay for the rear wiper motor. tailgate wiper on / intermittent / off.

Does the tailgate wiper operate?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S04253926982011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replacing the fuse

Check the tailgate wiper fuse; replace as necessary.

Remove relay 2/16 and check the relay base switches for contact resistance and oxidation.

Fit the relay.

Other information

1. To access the relay/fuse box in the cargo compartment: «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000)
2. See «Checking wiring and terminals. Intermittent faults»(ref-451698-S18629440922012020900000)

1. Continue Refer to «Information»(ref-431020-S33689102772011101900000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check the tailgate wiper fuse; replace as necessary.

Remove relay 2/16 and check the relay base switches for contact resistance and oxidation.

Fit a new relay.

Other information

1. To access the relay/fuse box in the cargo compartment: «Relay/fuse box cargo compartment/Rear electronic module (REM), replacing»(ref-451767-S28873772202012020900000)
2. See «Checking wiring and terminals. Permanent fault»(ref-451698-S31552937112012020900000)

1. Continue Refer to «Verification»(ref-431020-S17690627702011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reconnect the components, connectors etc.
3. Ignition on
4. Activate the relay for the rear wiper motor. tailgate wiper on / intermittent / off.

Does the tailgate wiper operate?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S22866195072011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect the connectors, install the components, etc.
3. Ignition on. Activate and de-activate the relay.

Is there a clicking noise from the relay when activated and deactivated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S17355753862011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect the connectors, install the components, etc.
3. Ignition on. Activate and de-activate the relay.

Is there a clicking noise from the relay when activated and deactivated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S26171389112011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the cargo compartment lighting. Check that the cargo compartment lighting is activated

Is the cargo compartment lighting activated?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S14824998992011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Replacing the control module

Try a new parking assistance module (PAM).

Remedy as necessary.

Other information

1. See «Parking assistance module (PAM), replacing»(ref-451758-S35803821152012020900000)

1. Continue Refer to «Verification»(ref-431020-S02107334472011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Switch off the ignition. Wait at least 15 seconds
2. Reinstall the connectors, components etc.
3. Ignition on for at least 5 seconds
4. Move the gear selector lever to back-up (reversing) (R). The parking assistance module (PAM) is activated by pressing the switch on the lower section of the climate control module (CCM). Click on the VCT2000 symbol to read off the diagnostic status from the parking assistance module (PAM). Check that the parking assistance module (PAM) is active. Check that the sensors are OK.

Is the parking assistance module (PAM) active? Are the sensors OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S33293619972011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Try a new parking assistance module (PAM).

Remedy as necessary.

Other information

1. See «Parking assistance module (PAM), replacing»(ref-451758-S35803821152012020900000)

1. Continue Refer to «Verification»(ref-431020-S37270002682011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Switch off the ignition. Wait at least 15 seconds
2. Reinstall the connectors, components etc.
3. Ignition on for at least 5 seconds
4. Move the gear selector lever to back-up (reversing) (R). The parking assistance module (PAM) is activated by pressing the switch on the lower section of the climate control module (CCM). Click on the VCT2000 symbol to read off the diagnostic status from the parking assistance module (PAM). Check that the parking assistance module (PAM) is active. Check that the sensors are OK.

Is the parking assistance module (PAM) active? Are the sensors OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S29613155902011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Try a new parking assistance module (PAM).

Remedy as necessary.

Other information

1. See «Parking assistance module (PAM), replacing»(ref-451758-S35803821152012020900000)

1. Continue Refer to «Verification»(ref-431020-S04138269012011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Switch off the ignition. Wait at least 15 seconds
2. Reinstall the connectors, components etc.
3. Ignition on for at least 5 seconds
4. Move the gear selector lever to back-up (reversing) (R). The parking assistance module (PAM) is activated by pressing the switch on the lower section of the climate control module (CCM). Click on the VCT2000 symbol to read off the diagnostic status from the parking assistance module (PAM). Check that the parking assistance module (PAM) is active. Check that the sensors are OK.

Is the parking assistance module (PAM) active? Are the sensors OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S34283284092011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Try a new parking assistance module (PAM).

Remedy as necessary.

Other information

1. See «Parking assistance module (PAM), replacing»(ref-451758-S35803821152012020900000)

1. Continue Refer to «Verification»(ref-431020-S08372862062011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Switch off the ignition. Wait at least 15 seconds
2. Reinstall the connectors, components etc.
3. Ignition on for at least 5 seconds
4. Move the gear selector lever to back-up (reversing) (R). The parking assistance module (PAM) is activated by pressing the switch on the lower section of the climate control module (CCM). Click on the VCT2000 symbol to read off the diagnostic status from the parking assistance module (PAM). Check that the parking assistance module (PAM) is active. Check that the sensors are OK.

Is the parking assistance module (PAM) active? Are the sensors OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S11120081422011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Try a new inclination sensor module (ISM).

Remedy as necessary.

Other information

1. See «Tilt sensor alarm, replacing»(ref-431006-S30649679772011101900000)

1. Continue Refer to «Verification»(ref-431020-S14466950572011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the alarm. Check that the functions are OK.

Are the functions OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S05252776392011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Try a new inclination sensor module (ISM).

Remedy as necessary.

Other information

1. See «Tilt sensor alarm, replacing»(ref-431006-S30649679772011101900000)

1. Continue Refer to «Verification»(ref-431020-S05060592362011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on. Activate the alarm. Check that the functions are OK.

Are the functions OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S37018091982011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Faulty communication

See Faulty communication

Faulty configuration

See Faulty configuration

Check the connectors for the rear electronic module (REM). Check for contact resistance and oxidation.

Check the terminals for the power supply (30-supply) from the battery to the rear electronic module (REM) (screw terminal). Check for contact resistance and oxidation. Also check the terminals for the fuse to the actual rear electronic module (REM).

Check the ground terminal from the rear electronic module (REM) terminal #12 (#D12) and ground terminal. Check for contact resistance and oxidation.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430921-S40351701642011101900000)
2. See «Signal specification»(ref-430923-S36978396402011101900000)
3. Disconnecting the rear electronic module (REM): «Rear electronic module (REM), replacing»(ref-430924-S10377460652011101900000)
4. See «Contents»(ref-430909-S26456997912011101900000)

Scheme 1879

Scheme 1880

1. Continue Refer to «Verification»(ref-431020-S18015751722011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the power supply for the rear electronic module (REM) and the central electronic module (CEM). The voltage for the rear electronic module (REM) and the central electronic module (CEM) must be approximately the same (a maximum difference of 3 V).

Is the voltage OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S39340999012011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Checking for permanent or intermittent faults

Open the driver's door window. Lock the car using the remote control.

Wait 25 seconds until the vehicle has been alarmed. Trigger the alarm by inserting a hand through the window and unlocking the door from the inside using the internal door handle.

Note. On vehicles with deadlocks, these must be deactivated first. Press the button for the reduced locking position to activate deadlocks.

The function can be engaged in ignition position I and 0. It can also be engaged after the ignition has been switched off, for up to one minute after the ignition key has been removed from the ignition switch. The switch has an integrated light emitting diode for indicating that the function has been activated. A message also appears in the display in the Driver information module however, not when the key has been removed. The switches may be positioned differently than shown in the image, depending on the vehicle's configuration and equipment.

Scheme 1881

Is the siren triggered?

1. YES Refer to «Intermittent fault»(ref-431020-S29404610092011101900000)
2. NO Refer to «Checking the connectors»(ref-431020-S33286197452011101900000)

Scheme 1882

1. Check the connectors for the siren, upper electronic control module and cable harness. Check for contact resistance and oxidation. In particular, check for any damage
2. Reinstall the components, reconnect the connectors etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the vehicle has been alarmed. Trigger the alarm by inserting a hand through the window and unlocking the door from the inside using the internal door handle. NOTE: On vehicles with deadlocks, these must be deactivated first. Press the button for the reduced locking position to activate deadlocks. The function can be engaged in ignition position I and 0. It can also be engaged after the ignition has been switched off, for up to one minute after the ignition key has been removed from the ignition switch. The switch has an integrated light emitting diode for indicating that the function has been activated. A message also appears in the display in the Driver information module however, not when the key has been removed. The switches may be positioned differently than shown in the image, depending on the vehicle's configuration and equipment. Other information: To access the siren connector, see «Siren, replacing»(ref-431006-S14848374132011101900000) See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Is the siren triggered?

1. YES Refer to «Verification»(ref-431020-S23568356762011101900000)
2. NO Refer to «Checking for open-circuits and short-circuits»(ref-431020-S37358387772011101900000)

Checking for open-circuits and short-circuits

Check that the fuses in the fusebox in the passenger compartment are intact.

Check the cable between control module terminal #21 and siren terminal #2. Check for a short-circuit to ground. Check for an open-circuit. Check for a short-circuit to supply voltage.

Check the wiring from the fuse in the passenger compartment to siren connector terminal #1. Check for an open-circuit. Check for a short-circuit to ground.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the siren connector, see «Siren, replacing»(ref-431006-S14848374132011101900000)
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Remedy as necessary.

Scheme 1883

Scheme 1884

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S23568356762011101900000)
2. NO Refer to «Replacing the siren»(ref-431020-S34781458622011101900000)

Replacing the siren

Replace the siren. See Siren, replacing .

The siren must be configured after replacement. Click on the VCT2000 symbol for configuration.

1. Continue Refer to «Verification»(ref-431020-S23568356762011101900000)

Intermittent fault

Check the connectors for the upper electronic module (UEM) and the siren. Check for contact resistance and oxidation. Check for loose connections.

Check that the fuses in the fusebox in the passenger compartment are intact.

Check the cable between control module terminal #21 and siren terminal #2. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for an intermittent short-circuit to supply voltage.

Check the cable between ground terminal 31/94 and siren connector terminal #3. Check for an intermittent open-circuit.

Check the cable between the fuse in the fusebox in the passenger compartment and siren connector terminal #1. Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground.

Try replacing the siren if no fault is found.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the siren connector and to replace the siren, see «Siren, replacing»(ref-431006-S14848374132011101900000)
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Information»(ref-431020-S03601965782011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the alarm is active. Trigger the alarm by reaching into the car and unlocking the door from the inside using the internal door handle.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S35557205552011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Communication fault

See Communication fault

1. Ignition on. Attempt to operate the sun roof.

Can the sun roof be operated?

1. YES Refer to «Intermittent fault»(ref-431020-S32181175762011101900000)
2. NO Refer to «Checking the connectors»(ref-431020-S27677861902011101900000)

Checking the connectors

1. Ignition off
2. Remedy the connectors for the cable harness, sun roof control module and upper electronic module (UEM) for contact resistance and oxidation. In particular, check for any damage
3. Reinstall the components, reconnect the connectors etc.
4. Ignition on. Operate the sun roof. Other information: To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) To access the sun roof connector, see «Control module, sun roof, replacing»(ref-430952-S23697945242011101900000) See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Do the sun roof controls operate?

1. YES Refer to «Verification»(ref-431020-S07039380262011101900000)
2. NO Refer to «Checking for open-circuits and short-circuits»(ref-431020-S10794208812011101900000)

Check the cable between the upper electronic module (UEM) terminal #21 and the sun roof module (SRM) terminal #4. Check for a short-circuit to ground. Check for an open-circuit. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the sun roof control module, see «Control module, sun roof, replacing»(ref-430952-S23697945242011101900000)
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Scheme 1885

Scheme 1886

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S07039380262011101900000)
2. NO FAULT NOT FOUND: Troubleshooting has been completed.

Check the connectors for the upper electronic module (UEM) and the sun roof module (SRM). Check for contact resistance and oxidation. Check for loose connections.

Check the cable between the upper electronic module (UEM) terminal #21 and the sun roof module (SRM) terminal #4. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for an intermittent short-circuit to supply voltage.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the sun roof control module, see «Control module, sun roof, replacing»(ref-430952-S23697945242011101900000)
4. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Information»(ref-431020-S08731577782011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect connector, install components etc.
3. Ignition on. Try to move the sunroof.

Does the sunroof move?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S24458972692011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Communication fault

Checking for a short-circuit

Check that the button has not jammed in its depressed position.

Check the cable from the upper electronic module (UEM) to the rear reading lamp module. Check for a short-circuit to ground.

Remove the connector from the reading lamp module and measure between the connector and the upper electronic module (UEM) as follows.

UEM-0008 Right rear reading lamp

Control module terminal #20 and reading lamp module terminal #6.

UEM-0009 Left rear reading lamp

Control module terminal #20 and reading lamp module terminal #2.

Replace the cable if a fault is found.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access or replace the reading lamp module, see «Bulb, reading lamp, rear, replacing»(ref-430927-S20913083392011101900000)
4. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Scheme 1887

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S08444094152011101900000)
2. NO FAULT NOT FOUND: Troubleshooting has been completed.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S27188517052011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Signal too low

See Signal too low

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the alarm is active. Trigger the alarm by reaching into the car and unlocking the door from the inside using the internal door handle.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S31213557232011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the alarm is active. Trigger the alarm by reaching into the car and unlocking the door from the inside using the internal door handle.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S15449365422011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the alarm is active. Trigger the alarm by reaching into the car and unlocking the door from the inside using the internal door handle.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S32348014342011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. Open the driver's door window. Lock the car using the remote control. Wait 25 seconds until the alarm is active. Trigger the alarm by reaching into the car and unlocking the door from the inside using the internal door handle.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S35139294512011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off
2. Reinstall the connectors, components etc. To check the mass movement sensor (MMS) in the S60/S80/V70/XC70 Check that the function for reduced alarm is not activated (button on 7 in row). Open the driver's window, close all doors and hatches. Lock the vehicle using the remote control. Wait 25 seconds until the alarm is active. Then trigger the alarm by waving your arm inside the vehicle. The siren or horn must sound and the hazard warning lamps flash. Reset the alarm by pressing the unlocking button on the remote control. Check that the mass movement sensor (MMS) has triggered the alarm via the read out of the alarm cause in Vehicle communication.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S11119038912011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Unlock the car using the key or remote control from outside.

Does the general interior lighting come on?

1. YES Refer to «Intermittent fault»(ref-431020-S19610541852011101900000)
2. NO Refer to «Checking for a short-circuit»(ref-431020-S22555770452011101900000)

Check that the button has not jammed in its depressed position.

Check the cable between control module terminal #16 and roof lamp module terminal #7A. Check for a short-circuit to supply voltage.

Check the cable between control module terminal #4 and roof lamp module terminal #8A. Check for a short-circuit to supply voltage.

Replace the cable if a fault is found.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the roof lamp module switches, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
5. With the ignition on and when the function is not activated, the voltage between terminals #7A and #8A and ground should be 0 V
6. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Scheme 1888

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S02304484902011101900000)
2. NO Refer to «Replacing the lamp housing»(ref-431020-S35104116232011101900000)

Replacing the lamp housing

Remove the housing with the buttons.

Press directly on the switch for the light button.

If the switch works, replace the lamp housing.

If the switch still does not operate, replace the printed circuit board with switches.

Other information

1. To access the interior lighting, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000) .

1. Continue Refer to «Verification»(ref-431020-S02304484902011101900000)

Check the control module and roof lamp module connectors. Check for contact resistance and oxidation. Check for loose connections.

Check the cable between control module terminal #16 and roof lamp module terminal #7A. Check for an intermittent short-circuit to supply voltage. Check for an intermittent open-circuit.

Check the cable between control module terminal #4 and roof lamp module terminal #8A. Check for an intermittent short-circuit to supply voltage. Check for an intermittent open-circuit.

Check the roof lamp module housing.

Check the roof lamp module switches.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the roof lamp module switches, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
5. With the ignition on and when the function is not activated, the voltage between terminals #7A and #8A and ground should be 0 V
6. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Information»(ref-431020-S12279140702011101900000)

HINT: After the repair it is necessary to check that the fault has been rectified.

1. Ignition off.
2. Connect the connectors, install the components, etc.
3. Ignition on. Press the lamp switch and check that the lamps come on and that the switch does not stick.

Does it work?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S06489971022011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check that the button has not jammed in its depressed position.

Check the cable between the upper electronic module (UEM) and the roof lamp module. Check for a short-circuit to supply voltage.

UEM-001D front left reading lamp

Control module terminal #4 and roof lamp module terminal #8A.

UEM-001E front right reading lamp

Control module terminal #16 and roof lamp module terminal #7A.

Replace the cable if a fault is found.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access the roof lamp module switches, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. With the ignition on and when the function is not activated, the voltage between terminal #8A (UEM 001D) and terminal #7A (UEM 001E) on the roof lamp unit (control module side) and ground should be 0 V
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S05951928362011101900000)
2. NO Refer to «Replacing the lamp housing»(ref-431020-S23494436982011101900000)

Remove the housing with the buttons.

Press the switch for the light button.

If the switch works, replace the lamp housing.

If the switch still does not operate, replace the printed circuit board and its switches.

Other information

1. To access the interior lighting, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000) .

1. Continue Refer to «Verification»(ref-431020-S05951928362011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S29300498952011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Signal too high

See Signal too high

Check that the remote control is working.

Does the remote control function?

1. YES Refer to «Fault-tracing information»(ref-431020-S10144799772011101900000)
2. NO Refer to «Query»(ref-431020-S33812082502011101900000)

Query

Has the central electronic module (CEM) been replaced recently?

1. YES Refer to «Ordering software»(ref-431020-S25246434962011101900000)
2. NO Refer to «Replacing control module and programming»(ref-431020-S10037652172011101900000)

Ordering software

1. Ignition off. If the central electronic module (CEM) was replaced before DTC001F was stored, the fault is probably in the data sent from the central electronic module (CEM). In this case the central electronic module (CEM) must be reprogrammed. To download software to the relevant control module, see Replacement parts catalogue/Software index.

1. Continue Refer to «Programming control module»(ref-431020-S10224619412011101900000)

Programming control module

Programming can be carried out when the software has been delivered.

To program software to the relevant control module, see Replacement parts catalogue/Software index.

Replacing control module and programming

Note. If possible, read off the programmed data from the control module before it is replaced.

1. Ignition off. The upper electronic module (UEM) has registered an internal fault.

1. Continue Refer to «Replacing the control module»(ref-431020-S09450458032011101900000)

Reading off the programmed values

Note. Read off the programmed values from the upper electronic module (UEM) before replacing the control module.

1. Ignition on
2. Click on the symbol for VCT2000 to read off the programmed values. The retained values are programmed customer parameters in the upper electronic module (UEM). The retained values should be noted for later use. Other information For information about programming the customer parameters, see «Diagnostic functions»(ref-430929-S30787651682011101900000) .

1. Continue Refer to «Replacing control modules and downloading software»(ref-431020-S30143752232011101900000)

Replacing control modules and downloading software

Replace the control module and download the new software. See Interior lighting and upper electronic module (UEM), replacing .

HINT: When diagnostic trouble code (DTC) E001 is stored, communication with the control module cannot be established. This can be remedied in two ways.

1. Press the remote control button for local lighting
2. Remove fuse 11C/28 from the fusebox in the passenger compartment. Reinstall the fuse again.

1. Continue Refer to «Checking the interior lighting»(ref-431020-S08425448042011101900000)

Checking the interior lighting

Two times can be programmed for the interior lighting

1. Short

1. The period from when the door is unlocked, or the engine stops, to when the interior lighting goes out can be changed if it is too long or too short.

2. Long

1. The period from when the door is opened, or a lamp is lit with a switch, to when the lamp goes out can be changed if it is too long or too short.

To program a long interior lighting period you must step ("click") through the short interior lighting period programming.

1. Continue Refer to «Programming a short interior lighting period»(ref-431020-S06307639962011101900000)

Programming a short interior lighting period

The general lighting and rear reading lamps light and remain lit for 30 seconds when

1. The door has been unlocked from outside with a key or the remote control.
2. The engine has been stopped and the ignition key turned to 0.

The default period is 30 seconds. This can be changed to between 5 and 255 seconds.

Read off the programmed values.

To change the time, mark the desired value in the scrolling list and start programming.

Do you want to program any more parameters?

1. YES Refer to «Programming a long interior lighting period»(ref-431020-S11861966962011101900000)
2. NO Refer to «Checking the anti-dazzle function in the rear view mirror»(ref-431020-S26835529402011101900000)

Programming a long interior lighting period

The general lighting and rear reading lamps light and remain lit for 10 minutes when

1. A door is opened after being unlocked.
2. The lamp is lit with a switch.

The default period is 10 minutes. This can be changed to between 0 and 255 minutes at 10 minute intervals.

Read off the programmed values.

To change the time, mark the desired value in the scrolling list and start programming.

1. Continue Refer to «Checking the anti-dazzle function in the rear view mirror»(ref-431020-S26835529402011101900000)

Checking the anti-dazzle function

Note. If the upper electronic module (UEM) has been replaced software, specially developed for downloading after replacing the control module, must be downloaded to the control module before the anti-dazzle function is changed. See Interior lighting and upper electronic module (UEM), replacing .

The rear view mirror anti-dazzle function can be adjusted

1. If the rear view mirror anti-dazzle function is too powerful or too weak, it can be adjusted.

Specific software for setting the anti-dazzle function must be installed in the car to do this.

Order the software. See 9499432 .

Install the software. See 9499432 .

Fault-tracing indicates that the control module had previously identified an intermittent fault, but that the fault is no longer present.

Replacing the control module and programming

Note. If possible, read off the programmed data from the control module before it is replaced.

1. Ignition off. The upper electronic module has registered an internal fault. As a result of the fault, the control module must be replaced.

1. Continue Refer to «Replacing the control module»(ref-431020-S26998716572011101900000)

Note. Read off the programmed values from the upper electronic module (UEM) before replacing the control module.

1. Ignition on
2. Click on the symbol for VCT2000 to read off the programmed values. The retained values are programmed customer parameters in the upper electronic module (UEM). The retained values should be noted for later use. Other information For information about programming the customer parameters, see «Diagnostic functions»(ref-430929-S30787651682011101900000) .

1. Continue Refer to «Replacing control modules and downloading software»(ref-431020-S32325083282011101900000)

Replace the control module and download the new software. See Interior lighting and upper electronic module (UEM), replacing .

HINT: When diagnostic trouble code (DTC) E001 is stored, communication with the control module cannot be established. This can be remedied in two ways.

1. Press the remote control button for local lighting
2. Remove fuse 11C/28 from the fusebox in the passenger compartment. Reinstall the fuse again.

1. Continue Refer to «Checking the interior lighting (2)»(ref-431020-S20033595872011101900000)

Two times can be programmed for the interior lighting

1. Short

1. The period from when the door is unlocked, or the engine stops, to when the interior lighting goes out can be changed if it is too long or too short.

2. Long

1. The period from when the door is opened, or a lamp is lit with a switch, to when the lamp goes out can be changed if it is too long or too short.

To program a long interior lighting period you must step ("click") through the short interior lighting period programming.

1. Continue Refer to «Programming a short interior lighting period»(ref-431020-S34325219942011101900000)

The general lighting and rear reading lamps light and remain lit for 30 seconds when

1. The door has been unlocked from outside with a key or the remote control.
2. The engine has been stopped and the ignition key turned to 0.

The default period is 30 seconds. This can be changed to between 5 and 255 seconds.

Read off the programmed values.

To change the time, mark the desired value in the scrolling list and start programming.

Do you want to program any more parameters?

1. YES Refer to «Programming a long interior lighting period»(ref-431020-S17988049062011101900000)
2. NO Refer to «Checking the anti-dazzle function in the rear view mirror»(ref-431020-S14877185642011101900000)

The general lighting and rear reading lamps light and remain lit for 10 minutes when

1. A door is opened after being unlocked.
2. The lamp is lit with a switch.

The default period is 10 minutes. This can be changed to between 0 and 255 minutes at 10 minute intervals.

Read off the programmed values.

To change the time, mark the desired value in the scrolling list and start programming.

1. Continue Refer to «Checking the anti-dazzle function in the rear view mirror»(ref-431020-S14877185642011101900000)

Note. If the upper electronic module (UEM) has been replaced software, specially developed for downloading after replacing the control module, must be downloaded to the control module before the anti-dazzle function is changed. See Interior lighting and upper electronic module (UEM), replacing .

The rear view mirror anti-dazzle function can be adjusted

1. If the rear view mirror anti-dazzle function is too powerful or too weak, it can be adjusted.

Specific software for setting the anti-dazzle function must be installed in the car to do this.

Order the software. See 9499432 .

Install the software. See 9499432 .

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Check the connectors on the upper electronic module and rear reading lamp unit for contact resistance and oxidation as described in Contact resistance and oxidation , and for a loose contact as described in Loose connections (terminals) .

Additional information

1. For information on signals and additional values, see «Signal specification»(ref-430923-S15249807432011101900000) .
2. To connect the test box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000) .

Is there a fault?

1. YES Refer to «Verification»(ref-431020-S25261242772011101900000)
2. NO Refer to «Checking for open circuits and short circuits»(ref-431020-S40240428372011101900000)

Check the wire between the upper electronic module and the control unit of the rear reading lamp unit for a short circuit to ground, as described in Short-circuit to ground, permanent faults .

Remove the connector from the roof lamp unit and measure between the connector and the UEM as described below.

UEM-0030 Rear left reading lamp

Control unit #20 and reading lamp unit #1.

UEM-0032 Rear right reading lamp

Control unit #20 and reading lamp unit #7.

Check the wire between the upper electronic module and the control unit of the rear reading lamp unit for an open circuit, as described in Open-circuit, permanent faults .

UEM-0030 Rear left reading lamp

Control unit #7 and reading lamp unit #1.

UEM-0032 Rear right reading lamp

Control unit #17 and reading lamp unit #7.

If a fault is found, replace the wire.

If the wire is OK, test with a new bulb.

Additional information

1. For information on signals and additional values, see «Signal specification»(ref-430923-S15249807432011101900000) .
2. To connect the test box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000) .
3. To replace the bulb, see «Bulb, reading lamp, rear, replacing»(ref-430927-S20913083392011101900000) .

1. Continue Refer to «Verification»(ref-431020-S25261242772011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S24370038532011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Check that the bulb is intact.

Check the connectors on the upper electronic module and rear reading lamp unit for contact resistance and oxidation as described in Contact resistance and oxidation , and a loose contact as described in Loose connections (terminals) .

Do the necessary corrective action.

Additional information

1. To access/replace the lamp, see «Bulb, reading lamp, rear, replacing»(ref-430927-S20913083392011101900000) .

Is there a fault?

1. YES Refer to «Verification»(ref-431020-S23254132792011101900000)
2. NO Refer to «Checking for open circuits and short circuits»(ref-431020-S01613162302011101900000)

Check the wire between the upper electronic module and rear reading lamp unit for an open circuit as described in Open-circuit, permanent faults , and a short circuit to voltage supply as described in Short-circuit to supply voltage. Permanent faults .

UEM-0031 Rear left reading lamp

Control unit #7 and reading lamp unit #1.

UEM-0033 Rear right reading lamp

Control unit #17 and reading lamp unit #7.

Additional information

1. For information on signals and additional values, see «Signal specification»(ref-430923-S15249807432011101900000) .
2. To connect the test box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000) .

1. Continue Refer to «Verification»(ref-431020-S23254132792011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S09072863332011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low

Signal missing

See Signal missing

Check the control module and roof lamp module connectors. Check for contact resistance and oxidation. Check for loose connections.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access or replace the roof lamp module, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S30037948492011101900000)
2. NO Refer to «Checking for open-circuits and short-circuits»(ref-431020-S34685797682011101900000)

Check the cable between the control module and the roof lamp unit. Check for a short-circuit to ground.

Remove the connector from the roof lamp module and measure between the connector and the upper electronic module (UEM) as follows.

UEM-0034 Left front reading lamp

Control module terminal #20 and roof lamp module terminal #3A.

UEM-0036 Right front reading lamp

Control module terminal #20 and roof lamp module terminal #4A.

Check the cable between the control module and the roof lamp unit. Check for an open-circuit.

UEM-0034 Left front reading lamp

Control module terminal #18 and roof lamp module terminal #3A.

UEM-0036 Right front reading lamp

Control module terminal #6 and roof lamp module terminal #4A.

Replace the cable if a fault is found.

If the cable is OK, try a new bulb in the roof lamp module.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To access or replace the lamp, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Verification»(ref-431020-S30037948492011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S08292140242011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Check that the bulb is intact.

Check the connectors for the upper electronic module (UEM) and roof lamp module. Check for contact resistance and oxidation. Check for loose connections.

Remedy as necessary.

Other information

1. To access or replace the lamp, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
2. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S27919587622011101900000)
2. NO Refer to «Checking for open-circuits and short-circuits»(ref-431020-S33928478002011101900000)

Check the cable between the upper electronic module (UEM) and the roof lamp module. Check for an open-circuit. Check for a short-circuit to supply voltage.

UEM-0035 Left front reading lamp

Control module terminal #18 and roof lamp module terminal #3A.

UEM-0037 Right front reading lamp

Control module terminal #6 and roof lamp module terminal #4A.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Verification»(ref-431020-S27919587622011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S12405922202011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low

See Signal missing

Check the control module and roof lamp module connectors. Check for contact resistance and oxidation.

Other information

1. To access the roof lamp module connector, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
2. To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Was a fault detected?

1. YES Refer to «Verification»(ref-431020-S05525353042011101900000)
2. NO Refer to «Checking for open-circuits and short-circuits»(ref-431020-S35625308112011101900000)

Check the cable between the control module terminal #19 and roof lamp module terminal #5A. Check for an open-circuit. Check for a short-circuit to ground.

Replace the cable if a fault is found.

Try new bulbs in the roof lamp module if no fault is found.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To replace bulbs in the roof lamp module, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000)
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Verification»(ref-431020-S05525353042011101900000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S39445365082011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low

Checking the cable and component

1. Ignition off
2. Check the connectors for the upper electronic module (UEM) and roof lamp module. Check for contact resistance and oxidation. Remedy as necessary
3. Reinstall the connectors, components etc.
4. Ignition on. Activate the general lighting: Click on the VCT2000 symbol. Other information: To access the roof lamp switch, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000) . To access the connector for the upper electronic module (UEM), see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

Do the lamps light?

1. YES Refer to «Verification»(ref-431020-S21113310232012010300000)
2. NO Refer to «Checking for an open-circuit»(ref-431020-S10087892392012010300000)

Checking for an open-circuit

Check the cable between the control module terminal #19 and roof lamp module terminal #5A. Check for an open-circuit. Check for a short-circuit to supply voltage.

Replace the cable if a fault is found.

If no fault was found, try replacing the lamps.

Other information

1. For further information about signals and other values, see «Signal specification»(ref-430923-S15249807432011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430921-S34302379142011101900000)
3. To replace the lamps, For -2002, see «Interior lighting and upper electronic module (UEM), replacing»(ref-430927-S13783131922011101900000) For 2003-, see «Interior lighting, replacing»(ref-430927-S21103868592011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000) .

1. Continue Refer to «Verification»(ref-431020-S21113310232012010300000)

HINT: After carrying out the repair, check that the fault has been remedied.

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on. Check that the relevant lamp button and lamp are functioning.

Does the lamp function?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-431020-S34583345472012010300000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.