3. ECT sensor 2 signal (TOH) circuit open-circuit
inspection
-1. Turn the ignition switch OFF and disconnect the
ECM connector A.
-2. Check for continuity between the No. 2 (Red/Green)
terminal of the ECT sensor 2 wire harness side con-
nector and the No. 15 (Red/Green) terminal of the
ECM connector A.
◆
Is there continuity?
YES - Go to the step 4.
NO -
Repair open circuit between the ECT sensor
2 and the ECM.
4. ECT sensor 2 ground (SG) circuit open-circuit
inspection
-1. Connect the ECM connector A.
-2. Check for continuity between the No. 1 (Green) ter-
minal of the ECT sensor 2 wire harness side 2P
connector and the body ground.
◆
Is there continuity?
YES - Go to the step 5.
NO -
Repair open circuit between the ECT sensor
2 and ECM.
5. ECT sensor 2 inspection
-1. Connect the ECM connector A and the ECT sensor
2 connector.
-2. Turn the ignition switch ON and check the engine
temperature with the HDS (Dr. H or Pocket Tester).
◆
Does it agree with actual engine temperature?
YES - Recheck with a new ECM.
NO -
Replace the ECT sensor 2.
5-22
BF115A•BF130A
ECT SENSOR 2
2P CONNECTOR
(Wire harness side)
View from the terminal side
ECM connector A
TOH
(RED/GREEN)
View from the terminal side
ECT SENSOR 2
2P CONNECTOR
(Wire harness side)
SG (GREEN)
