Toyota Camry Manual page 531

BE–212
Electronically Controlled Transaxle Communication Circuit
CIRCUIT DESCRIPTION
CIRCUIT DESCRIPTION
When driving uphill under cruise control, in order to reduce shifting due to ON–OFF overdrive opera–
tion and to provide smooth driving, when down shifting in the electronically controlled transaxle oc–
curs, a signal to prevent upshift until the end of the uphill slope is sent from the cruise control ECU to
the ECM.
Terminal ECT of the cruise control ECU detects the shift change signal (out–put to electronically con–
trolled transaxle No.2 solenoid) from the ECM.
If vehicle speed down and terminal ECT of the control ECU receivers down shifting signal, it sends a
signal from terminal OD to ECM to cut overdrive until the end of the uphill slope, and the gearshifts are
reduced.
DIAGNOSTIC CHART
Check operation of overdrive.
Check voltage between terminal OD of
harness side connector of cruise
control ECU and bod round.
Check voltage between terminal ECT
of cruise control ECU connector and
body ground (ON test drive).
Check harness and connector between terminal ECT
of cruise control ECU and electronically controlled
transaxle No.2 solenoid. (Seepage
Check and repair cruise control ECU.
Check harness and connector between
terminal OD of cruise control ECU and
terminal OD 1 of ECM.
Check and replace ECM.
BODY ELECTRICAL SYSTEM
IN–31 )
– CRUISE CONTROL SYSTEM_
Check and repair electronically
controlled transaxle
(See page AX' Section).
Proceed to next circuit
inspection shown on matrix
chart (See page BE–178).
Repair or replace harness or
connector.
Repair or replace harness or
connector.