EN(H4DOTC)(diag)-384
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
accelerator pedal position sensor.
3) Measure the resistance of harness between
ECM connector and accelerator pedal position
sensor connector.
Connector & terminal
(B135) No. 23 — (B315) No. 6:
(B135) No. 29 — (B315) No. 5:
Is the resistance less than 1 Ω? Go to step
2.
Repair the open
circuit of harness
between ECM con-
nector and accel-
erator pedal
position sensor
connector.
2
CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR
CONNECTOR.
1) Connect the connector to ECM.
2) Measure the resistance between accelera-
tor pedal position sensor connector and chassis
ground.
Connector & terminal
(B315) No. 5 — Chassis ground:
Is the resistance less than 5 Ω? Go to step
3.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM
connector
and engine ground
• Poor contact of
ECM connector
• Poor contact of
coupling connector
3
CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR
CONNECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between accelerator
pedal position sensor connector and chassis
ground.
Connector & terminal
(B315) No. 6 (+) — Chassis ground (–):
Is the voltage 5 V or more?
Repair the short
circuit to power
supply in harness
between ECM con-
nector and accel-
erator pedal
position sensor
connector.
Go to step
4.
4
CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance between ECM con-
nectors.
Connector & terminal
(B135) No. 21 — (B135) No. 23:
Is the resistance 1 MΩ or
more?
Repair the poor
contact of acceler-
ator pedal position
sensor connector.
Replace the accel-
erator pedal if
defective. <Ref. to
SP(STI)-4, Accel-
erator Pedal.>
Repair the short
circuit to power
supply in harness
between ECM con-
nector and accel-
erator pedal
position sensor
connector.