Toyota Celica 2005 Repair Manual page 1272

3 Check voltage between terminal STP− of cruise control ECU connector and
body ground.
ON
(−) (+)
AB0119
I00142
NG
4 Check for open in harness and connectors between terminal STP− of cruise con-
trol ECU and stop light switch (See page IN−30).
OK
Check and replace cruise control ECU (See
page IN−30).
2005 CELICA (RM1131U)
DIAGNOSTICS
STP−
I00173
− CRUISE CONTROL SYSTEM (1ZZ−FE)
PREPARATION:
(a) Remove ECU with connectors being connected.
(b) Turn ignition switch ON.
CHECK:
Measure the voltage between terminal STP− of the cruise con-
trol ECU connector and body ground when the brake pedal is
depressed and released.
OK:
Depressed
Released
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI−1048).
NG Repair or replace harness or connector.
1271
DI−1071
10 − 14 V
Below 1 V