BF135A•BF150A
5-76
3. TP sensor signal line open circuit check
-1. Turn the ignition switch OFF and disconnect the TP
sensor connector.
-2. Measure the voltage between the No. 2 (Red/Black)
terminal of the TP sensor harness side 3P connector
and the engine ground.
Is the measured voltage 4.75 – 5.25V?
YES –
Perform "4. TP sensor signal line short circuit
check".
NO –
Repair open in the wire between the TP sen-
sor and the ECM.
4. TP sensor signal line short circuit check
-1. Turn the ignition switch OFF and disconnect the TP
sensor connector.
-2. Check for the continuity between the No. 2 (Red/
Black) terminal of the TP sensor harness side 3P con-
nector and the engine ground.
Is there the continuity?
YES –
Repair short in the wire between the TP sen-
sor and the ECM.
NO –
Perform "5.TP sensor ground line open circuit
check".
5. TP sensor ground line open circuit check
-1. Turn the ignition switch OFF and disconnect the TP
sensor 3P connector.
-2. Check for the continuity between the No. 1 (Green/
Red) terminal of the TP sensor harness side 3P con-
nector and the engine ground.
Is there the continuity?
YES –
Perform "6. TP sensor check".
NO –
Repair open in the wire between the TP sen-
sor and the engine ground.
6. TP sensor check
-1. Turn the ignition switch OFF and connect the TP sen-
sor 3P connector.
-2. Measure the voltage between the B-7 terminal and the
A-2 terminal of the test harness.
Is the voltage 4.49 – 4.85V when the throttle is fully
open and 0.44 – 0.56V when the throttle is fully
closed?
YES –
Substitute a known-good ECM and recheck.
NO –
Replace the TP sensor.
TP SENSOR HARNESS SIDE
3P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
THL (RED/BLACK)
TP SENSOR HARNESS SIDE
3P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
SG2 (GREEN/RED)
TP SENSOR HARNESS SIDE
3P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
A-2
B-7
THL (RED/BLACK)