Coupling codes

OPERATING INSTRUCTIONS F106.7/F106.7A/F156.7/F156.7A

Coupling codes

40001345.00-en

Code Meaning Possible repair steps

4209 red Short circuit to battery voltage at coupling K1 4210 red Short circuit to ground at coupling K1 4211 red Circuit open at coupling K1 4212 red Short circuit to ground at coupling K2 4213 red Circuit open at coupling K2 4214 red Short circuit to battery voltage at coupling K3 4215 red Short circuit to ground at coupling K3 4216 red Circuit open at coupling K3 4217 red Short circuit to battery voltage at coupling K4 4225 red Short circuit to ground at coupling K4 4226 red Circuit open at coupling K4 4227 red Circuit open at coupling K4 4228 red Short circuit to battery voltage at coupling KV 4229 red Short circuit to ground at coupling KV 4230 red Circuit open at coupling KV 4231 red Short circuit to battery voltage at coupling KR 4232 red Short circuit to ground at coupling KR 4233 red Circuit open at coupling KR Check cable between TCU and transmission control valve. Check connector between TCU and transmission control valve. Check controller resistance. Check internal wiring harness of transmission control valve. 4241 red Short circuit to ground at backup alarm relay coupling

4242 red Short circuit to battery voltage at backup alarm relay 4243 red Circuit open at backup alarm relay Check cable between TCU and backup alarm relay. Check connector between backup alarm relay and TCU. Measure resistance in backup alarm relay circuit.

OPERATING INSTRUCTIONS F106.7/F106.7A/F156.7/F156.7A

Code Meaning Possible repair steps

4273 red Slipping at coupling K1

4274 red Slipping at coupling K2

4275 red Slipping at coupling K3

4276 red Slipping at coupling K4 Measure pressure at coupling K1. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling. Measure pressure at coupling K2. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling. Measure pressure at coupling K3. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling. Measure pressure at coupling K4. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling.

4277 red Slipping at coupling KV

4278 red Slipping at coupling KR

4279 yellow Oil temperature in valve housing exceeds limit value Measure pressure at coupling KV. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling. Measure pressure at coupling KR. Check main pressure in system. Check signal at internal speed sensor. Check signal at output speed sensor. Replace coupling. A critical stop function warning occurred. The red stop indicator comes on and a continuous warning signal is sounded. Stop the vehicle and carry out the required service in the critical range. Allow the vehicle to cool. Check oil level. Check temperature sensor.

OPERATING INSTRUCTIONS F106.7/F106.7A/F156.7/F156.7A

Code Meaning Possible repair steps

4281 yellow Engine speed is measured at over 5,000 rpm for 0.2 sec. Check engine speed sensor.

4282 yellow TCU detects that the voltage at the oil filter maintenance switch is outside the allowed tolerance (filter clogged)

4284 yellow Output speed too high 4288 yellow Engine torque or output too high 4289 yellow Transmission output torque overload Check oil filter. Check wiring between TCU and filter maintenance switch. Check filter maintenance switch (measure resistance).

4290 yellow Transmission input torque overload

4291 red Oil temperature at converter output exceeds limit

4292 yellow Short circuit to ground at joystick status indicator 4293 yellow Short circuit to battery voltage at joystick status indicator 4294 yellow Current to joystick status indicator too high 4305 yellow Short circuit to battery voltage at sensor power supply 4306 yellow Short circuit to ground at sensor power supply A critical stop function warning occurred. The red stop indicator comes on and a continuous warning signal is sounded. Stop the vehicle and carry out the required service in the critical range. Allow the vehicle to cool. Check oil level. Check temperature sensor.

Check cable between TCU and joystick. Check connector between TCU and joystick. Measure the joystick resistance.

Check cable between TCU and the sensors. Check connector between TCU and the sensors.

OPERATING INSTRUCTIONS F106.7/F106.7A/F156.7/F156.7A

Code Meaning Possible repair steps

4307 white Battery voltage too low 4308 white Battery voltage too high Check batteries. Check (+) cable between batteries and TCU. Measure voltage at contact 35 in TCU connector.

4309 red Fault in VPS1 power supply to solenoid switch 4310 red Fault in VPS2 power supply to solenoid switch

Check fuse A2. Check cable between control valve and TCU. Check connector between control valve and TCU. Replace TCU. 4325 yellow Vehicle identification timeout 4326 red Undefined chassis number query on CAN 4337 red General EEPROM error Replace TCU. 4338 red Configuration error Program the correct configuration for the new vehicle.

4339 red Application error (ZF internal) Replace TCU. 4341 red Coupling calibration error Calibrate transmission couplings as instructed. 4342 yellow Coupling configuration data lost Calibrate transmission couplings as instructed.

4344 yellow

4345 yellow CAN “selected gear range” message (transmission 3 identical) contains invalid data TCU receiving FWD CAN messages although configuration indicates no FWD wheel control installed Stop operation

Stop operation

4346 yellow Timeout error on “gear range selection” message from FWD wheel control Stop operation

4347 yellow Timeout error on “FWD status” message from FWD wheel control Stop operation

4348 yellow CAN “FWD status” message contains invalid data Stop operation

4349 yellow Short circuit to ground at DLM output 4350 yellow Short circuit on battery + at DLM output 4351 yellow Short circuit on battery + at DLM warning lamp 4352 yellow Open circuit at DLM warning lamp Code possible only if additional ZF diagnosis module connected to TCU.