Action: Check all cables and connectors from the TCM to the central ECU (including check for chafing damage). With valve wiring disconned from central ECU: resistance of valve should be in [6..17] Ohm, resistance between actual valve connection and all wires of different components on the same connector should be larger than 200 kOhm. If not ok then measure directly on TCM connector, alve should be in [6..17] Ohm. if not ok then replace TCM else repair wiring. Connect again on ECU side and disconnect from TCM side: Set ECU in AM mode: Measure voltage difference between valve and vehicle ground should be lower than 3 V. If not ok then repair harness. If result is ok reconnect everything delete error code, check if error code appears again (activate Backup valve via diagnosis) . If error is not detected again. The error is intermittent try to reproduce the error by moving cables and connectors. If error cannot be reproduced no further action is possible.

Diagnostic depth