Suzuki 2006 SX4, Service Manual

Page: 158 / 1478

1A-114 Engine General Information and Diagnosis:
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Throttle actuator control relay circuit check
1) Remove throttle actuator control relay with ignition
switch turned OFF.
2) Check for proper terminal connection to throttle actuator
control relay and ECM connectors.
3) If connections are OK, turn ignition switch to ON
position.
4) Check that circuit voltage of throttle actuator control
relay (coil side and switch side) power supply circuit is
battery voltage.
Is it in good condition?
Go to Step 3. Repair or replace power
supply circuit of throttle
actuator control relay
(coil side and/or switch
side).
3 Throttle actuator control relay check
1) Check throttle actuator control relay for operation
referring to “Engine and Emission Control System Relay
Inspection in Section 1C”.
Is it in good condition?
Go to Step 4. Replace throttle
actuator control relay.
4 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check that throttle actuator control relay (coil side and
switch side) circuit is as follows.
• Wiring harness resistance of throttle actuator control
relay (coil side and switch side) control circuit is less
than 3
Ω
• Insulation resistance between throttle actuator control
relay (coil side and switch side) control circuit and
vehicle body ground is Infinity
• Insulation resistance of wire harness is infinity
between throttle actuator control relay (coil side)
terminal and each other terminal at throttle actuator
control relay connector
• Circuit voltage of throttle actuator control relay (coil
side and switch side) control circuit is 0 – 1 V with
ignition switch turned ON
Are they in good condition?
Substitute a known-
good ECM and recheck. Repair or replace
control circuit of throttle
actuator control relay
(coil side and/or switch
side) is open, short or
high resistance.