WM 912801 Checking Antenna Cables: Checks: Pcm

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Work instruction		Yes	No
1	Perform general checks. (See General checks → Checks
2	Perform test steps 1 - 8 from checking instructions for radio CDR23 on right antenna amplifier. (See Radio CDR23 → Checks Fault is present?	Correct fault (see Radio CDR23 → Checks	==> Step 3
3	Measure voltage at positive connection of left antenna amplifier. Voltage is 10 - 14 V?	==> Step 5	==> Step 4
4	Check positive cable from right to left antenna amplifier for open circuit & check for ground short. Open circuit or ground short is present?	Replace lead.	Replace right antenna amplifier if necessary since the right antenna amplifier is supplied with vehicle voltage from the left amplifier. ==> End
5	Disconnect HF conductor (internal conductor) of antenna lead, which provides shielding between right and left antenna amplifier (beige connectors), from both antenna amplifiers and check for short circuit. Short circuit is present?	==> Step 6	Replace antenna lead. ==> End
6	Check for open circuit in HF conductor (internal conductor) of antenna lead, which provides shielding between right and left antenna amplifier (beige connectors). Open circuit is present?	==> Step 7	Replace antenna lead. ==> End
7	Check each antenna lead individually. To do this, pull off all antenna leads (black connectors) from the amplifiers. If all lines have been pulled off, no stations (max. of 1 to 2 very powerful stations) should be received. Connect the left antennae one by one. Can several stations be received?	==> Step 8	Replace antenna. If necessary, replace left antenna amplifier. ==> End
8	Disconnect all antennae, then connect the right antennae. Can several stations be received?	==> End	Replace antenna. If necessary, replace right antenna amplifier. ==> End