Unlocking Vehicle Using Central Locking Switch Inoperative
Unlock vehicle using interior central locking switch. All doors, fuel door and trunk should unlock within 3 seconds. If vehicle does not unlock and pump in PSE control module does not run, check the following as possible cause and repair as necessary:
- Check wiring. See WIRING DIAGRAMS .
- Using Hand-Held Tester (965 589 00 01 00), check PSE control module version coding.
- Suspect faulty PSE control module.
If vehicle does not unlock and pump in PSE control module runs, check the following as possible cause and repair as necessary:
- Perform central locking system TEST 1: INTERIOR CENTRAL LOCKING SWITCH (SLK230). See CENTRAL LOCKING under SYSTEM TESTS .
- Perform central locking system TEST 2: INTERIOR CENTRAL LOCKING SWITCH (CL500, S320, S420, S500). See CENTRAL LOCKING under SYSTEM TESTS .
- Perform central locking system TEST 3: INTERIOR CENTRAL LOCKING SWITCH (SL500). See CENTRAL LOCKING under SYSTEM TESTS .
- Perform central locking system TEST 4: INTERIOR CENTRAL LOCKING SWITCH (SL500). See CENTRAL LOCKING under SYSTEM TESTS .
- Perform central locking vacuum TEST 1: CENTRAL LOCKING SYSTEM PRESSURE CHECK. See CENTRAL LOCKING under VACUUM SYSTEM TESTS .
- Perform central locking vacuum TEST 3: INDIVIDUAL COMPONENT PRESSURE TESTS. See CENTRAL LOCKING under VACUUM SYSTEM TESTS .
- Perform pneumatic system vacuum TEST 2: CENTRAL LOCKING SYSTEM PRESSURE SUPPLY (DRIVER'S DOOR). See PNEUMATIC SYSTEM EQUIPMENT under VACUUM SYSTEM TESTS .
- Perform pneumatic system vacuum TEST 4: CENTRAL LOCKING SYSTEM PRESSURE SUPPLY (PASSENGER'S DOOR, REAR DOORS & TRUNK LID LOCK). See PNEUMATIC SYSTEM EQUIPMENT under VACUUM SYSTEM TESTS .
- Perform pneumatic system vacuum TEST 6: CENTRAL LOCKING SYSTEM PRESSURE SUPPLY (TRUNK LID LOCK). See PNEUMATIC SYSTEM EQUIPMENT under VACUUM SYSTEM TESTS .
- Perform pneumatic system vacuum TEST 8: CENTRAL LOCKING SYSTEM PRESSURE SUPPLY (FUEL DOOR). See PNEUMATIC SYSTEM EQUIPMENT under VACUUM SYSTEM TESTS .