Diagnosis Procedure
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
- Turn ignition switch ON.
- Check the voltage between ECM harness connector and ground.
+
-
Voltage
ECM
Connector
Terminal
Connector
Terminal
F79
123
E32
204
Battery voltage
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F79
123
F24
65
Existed
- Also check harness for short to ground.
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK FUSE
- Turn ignition switch OFF.
- Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
IPDM E/R
#55
15A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
GO TO 4.
- CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL
Check the voltage between ECM harness connector and ground as per the following conditions.
ECM
Condition
Voltage
(Approx.)
+
-
Connector
Terminal
Connector
Terminal
F79
96
E32
204
Ignition switch: OFF
0 V
Ignition switch: ON
Battery voltage
Is the inspection result normal?
YES
INSPECTION END
NO
GO TO 5.
- CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F79
96
F19
57
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.