AD80.35-D-6002B | Radio frequency locking (RFL) test of electrical system | 25.7.97 |
MODEL 901, 902, 903, 904 with ENGINE 602
with CODE (FZ1) Radio frequency central locking
with CODE (FZ7) Immobilizer
Radio frequency locking (RFL) diagnosis basic knowledge | |||
| Battery voltage >11 volts | ||
| Fuses in order | ||
| Drive authorization system (DAS) complete (all plug connections plugged in) | ||
| Vehicle unlocked with transmitter key | ||
| Connecting hand-held tester (HHT) | ||
| DFI engine control module with RFL control module properly identified | ||
| Cables, connectors and plug connectors are covered by the test with the HHT and may have to once again tested separately, if a fault is displayed, for open circuit, good contact and correct connection on the basis of the valid wiring diagram. | ||
| Do not unplug control module sockets unless the ignition is switched off. | ||
Testing | |||
1 | RFL test of electrical system control module | Voltage supply | |
2 | RFL test of electrical system control module antenna reception | ||
3 | RFL test of electrical system engine management enable dataline | ||
4 | RFL test of electrical system immobilizer indicator lamp | if fault code B1780 displayed | |
5 | RFL test of electrical system central locking interface | if fault code B1781 displayed Central locking does not respond | |
6 | RFL test of electrical system central locking interface | if fault code B1781 displayed + |