Fault code 0532: Diagnosis/troubleshooting

NOTE: Visual inspection: In the next troubleshooting section, please check first that the affected 'pin' of the transverse lock control unit plug connection and the 'pin' of the plug connections are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

NOTE: Control unit replacement: Before replacing the 'transverse lock control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'transverse lock control unit' should be detected and remedied.

Before carrying out the work instruction, please check fuse '22', terminal 30 power supply for the transverse lock control unit, in the fuse carrier at the left of the dashboard and replace it if necessary. After replacing the fuse, determine and remedy the cause of the fault in accordance with the work instruction below!

DIAGNOSIS TROUBLESHOOTING PROCEDURE

Work instruction			Display OK	If not OK
1	Check battery voltage/current and alternator charging voltage/current:	Engine speed > 2,000 rpm. Measure charging voltage/current of generator.	11.4 to 14.5 V Go to Step 2	Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase fault memory and then read out fault memory again while observing diagnostic conditions. If no fault stored, then: → End If fault reappears, then: Go to Step 2
2	Check terminal 30 voltage supply and ground supply line to transverse lock control unit:	Measurement '2a': Ignition off Pull plug off the transverse lock control unit Measure voltage between 'pin 46' of transverse lock control unit plug and ground.	10.5 to 14.5 V go to measurement '2b'	Check fuse '22' in fuse carrier at left of dashboard (resistance measurement). Check voltage supply line for short circuit to ground: Go to Step 3
2		Measurement '2b': Measure voltage between 'pin 47' of transverse lock control unit plug and battery terminal 30.	10.5 to 14.5 V Go to Step 3	Check ground supply line for short circuit to B+: Go to Step 3
3	Check voltage supply line for short circuit to ground:	Measurement '3a': Measure voltage between 'pin 46 and battery positive' of transverse lock control unit plug.	< 0.3 V Measurement '3b'	Short circuit to ground between transverse lock control unit plug leads 'pin 46 and fuse 22' in fuse carrier at left of dashboard. Repair wiring and replace faulty fuse. → End
3	Check ground supply line for short circuit to B+:	Measurement '3b': Measure voltage between 'pin 47 and ground' of transverse lock control unit plug.	< 0.3 V Go to Step 4	Short circuit to B+ between transverse lock control unit plug leads 'pin 47' and ground pin MB41. Repair wiring. → End
4	Check for open circuit of terminal 30 voltage supply line and ground supply line for ground pin MB41:	Measure resistance on transverse lock control unit plug between 'pin 46 and fuse 22' in fuse carrier at left of dashboard. Measure resistance between 'pin 47' of transverse lock control unit plug and ground pin MB41.	< 0.5 Ω Go to Step 5	Open circuit in wire to fuse carrier at left of dashboard. Open circuit in wire to ground pin MB41. Repair wiring. Also check fuse. → End
5	Check terminal 30 voltage supply at fuse:	Measure voltage between fuse plug '22 and body ground' in fuse carrier at left of dashboard.	10.5 V to 14.5 V Go to Step 6	Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at left of dashboard. → End
6	Replace transverse lock control unit		Please see above note on replacing control units! → End