AT1-91 AT340E (2JZ-GE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING O D Cancel Signal Circuit CIRCUIT DESCRIPTION While driving with cruise control activated, in order to minimize gear shifting and provide smooth uphill cruising, overdrive may be prohibited temporarily in some conditions. The Cruise Control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels overdrive shifting until these signals are discontinued. (For details, see the cruise control section, page BE–162) WIRING DIAGRAM Cruise Control ECU OD 9 BR-B 11 BR-B 12 OD1 C10 IJ2 E10 4 – 6 V ECM INSPECTION PROCEDURE 1 Check voltage between terminal OD1 of ECM connector and body ground. ON Check and replace ECM. Check Harness A ECM A 12 OD1 BE6663 AT8774 P 1. Connect the Check Harness A to the ECM (See page EG–404). 2. Turn ignition switch ON. C Measure voltage between terminal OD1 of ECM connector and body ground. OK Voltage: 4 – 6 V NG OK Proceed to next circuit inspection shown on matrix chart (See page AT1–58).