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2.1 Electronic Automatic Transmission Control (ETC)   >   13 Diagnosis - Complaint Related Diagnostic Chart

Complaint/Problem Possible cause Test step/Remedy 1) Customer complaint: Transmission does not shift into 5GR or 4GR (vague complaint) Determine exact complaint by performing a test drive 11 Transmission occasionally does not shift into 5GR, no DTC in memory Sockets on TB switch AP potentiometer connector (S29/4x2) spread Repair sockets on connector Transmission shifts into 5GR only under WOT Vacuum line from intake manifold and DI control module (N1/3) not connected or leaking Connect/replace vacuum line Transmission shifts 4 5 4 at approximately 2200 rpm or DTC's can only be read with engine running Wires (socket 8 and 9) reversed on interior/engine connector (X26) Correct wiring/pin layout Transmission shifts 3 5, DTC Valve block connector (Y3/1x1) on transmission not reconnected after repair work and engine idled > 100 rpm Erase DTC If DTC reappears 23 9.0 Transmission occasionally does not shift into 5GR, transmission shifts 4 5 4 Loose contact on TB switch AP potentiometer connector (S29/4x2), incorrect TCM (N15/1) installed Repair loose contact, install correct TCM. No 5GR Load signal DI control module (N1/3) Wiring between N1/3 and N15/1 23 7.0 No 5GR Accelerator pedal signal Wiring Connector 23 2.0 No 5GR RPM signal DI control module (N1/3) Engine systems (MAS) control module (N16) CFI control module (N3) Wiring 23 5.0 No 5GR Vehicle speed signal (VSS) Instrument cluster Wiring 23 2.0 No 4GR Valve block control valve (Y3/1y2) TCM (N15/1) 23 9.0 No 4GR No control voltage Overvoltage protection relay module (K1/2) 23 1.0 No 5GR TR "D" signal 23 3.0 No kickdown or downshift Kickdown signal 23 8.0 1) Observe Preparation for Test, see 22.