Engine General Information and Diagnosis: 1A-143
DTC Troubleshooting
NOTE:
• Before performed trouble shooting, be sure to read the “Precautions of ECM Circuit Inspection: ”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits: ”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and
confirm that the trouble has been corrected.
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
Starter signal check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Start engine, measure voltage between “C37-48”
terminal of ECM connector and vehicle body ground.
Is voltage 0 – 1 V?
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00”. If OK, substitute a
known-good ECM and
recheck.
Go to Step 3.
3
Wire circuit check
1) Disconnect starting motor control relay in relay box with
ignition switch turned OFF.
2) Check for proper connection to starting motor control
relay at “RED/WHT”, “RED”, “WHT”, “YEL” (A/T vehicle)
and “YEL/GRN” (M/T vehicle) wire terminals.
3) Disconnect connectors from starting motor.
4) Check for proper connection to ECM at “C37-48”
terminal.
5) Measure voltage between “C37-48” terminal of ECM
connector and vehicle body ground with ignition switch
turned ON.
Is voltage 0 – 1 V?
Go to Step 4.
For A/T vehicle, “YEL”
or “YEL/GRN” wire is
shorted to power circuit.
For M/T vehicle, “YEL/
GRN” wire is shorted to
power circuit.
If wires are OK,
substitute a known-
good ECM and recheck.
4
Wire circuit check
1) Measure voltage between “RED/WHT” wire terminal of
starting motor control relay connector and vehicle body
ground wire ignition switch turned ON.
Is voltage 0 – 1 V?
Go to Step 5.
Faulty ignition switch,
check ignition switch
referring to “Ignition
Switch Inspection: in
Section 9C”.
If ignition switch is OK,
check for short circuit
between ignition switch
and starting motor
control relay to power
circuit.
5
Starting motor control relay check
1) Check starting motor control relay referring to “Main
Is it in good condition?
Substitute a known-
good ECM and recheck.
Replace starting motor
control relay.
Содержание SWIFT RS415 2017
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