"8.1 No communication between diagnostic tester and control module" · Test Work instruction Result Poss

911 Carrera 4 (996) PSM diagnosis "8.1 No communication between diagnostic tester and control module" Test Work instruction Result Possible causes of fault TOl Test: short to ground in power Greater No: supply circuit than 11 .Check the following componentsfor correct functioning .Ignition off battery .All loads switched off and .Pull wiring harness plug off of generator diagnostic tester .Check following circuits for correct .Measure voltage betweenthe functioning: following terminals: terminal 31 (GP 13) battery wiring harness plug (component landIterminal side) 30 terminal 30 and ground Yes: T02 T02 Test: short to ground/open circuit Greater No: in power supply circuit than 11 .Check the following componentsfor correct functioning .Measure voltage betweenthe fuse B1, following terminals: fuse F6 diagnosiswiring harness plug (wiring .Check the following connectionpoints harness side)terminal 16 in the passenger compartmentwiring and harness: 17, 120 Note: an open circuit or a short circuit ground is present. Checkwiring harness for continuityand for pinches or chafing Yes:103 damage, Possiblefault causes can be identifiedby consistentlychecking all steps. The control module can only be replaced once all other possibilitieshave been ruled out. The next step in the main diagnosis t est is test step 4. Read out fault memory. The procedure here is identical. If no fault is stored with "present" status, test steps 6 -11 must be carried out until the cause of the fault has been found. !I