Engine General Information and Diagnosis: 1A-168
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions For 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
Electric load current sensor power/ ground circuit
check
1) Disconnect connector from electric load current sensor
with ignition switch turned OFF.
2) Check for proper connection of wire terminal to electric
load current sensor connector.
3) If connections are OK, check electric load current sensor
circuit for the following.
• Resistance between ground circuit wire of electric
load current sensor connector and vehicle body
ground is less than 1
Ω
(ground circuit check)
• Voltage between 5 V power circuit wire of electric load
current sensor connector and vehicle body ground is
4 – 6 V with ignition switch tuned ON (power circuit
check)
Is it in good condition?
Go to Step 3.
Repair or replace
defective wire and/or
check connected
sensors to this circuit.
3
Electric load current sensor output circuit check
1) Disconnect connector from ECM with ignition switch
turned OFF.
2) Check for proper connection of electric load current
sensor wire terminal to ECM connector.
3) If connections are OK, check electric load current sensor
circuit for the following.
• Resistance of electric load current sensor output
circuit wire between electric load current sensor
connector and ECM connector is less than 1
Ω
(continuity check)
• Resistance between electric load current sensor
output circuit wire of electric load current sensor
connector and vehicle body ground is infinity
(insulation check)
• Voltage between electric load current sensor output
circuit wire of electric load current sensor connector
and vehicle body ground is 0 V with ignition switch
tuned ON (power circuit short check)
Is it in good condition?
Go to Step 4.
Repair or replace
defective wire.
4
Electric load current sensor check
1) Check for electric load current sensor output referring to
“Electric Load Current Sensor On-Vehicle Inspection
(For J20 Engine): in Section 1C”.
Is check result satisfactory?
Substitute a known
good ECM and recheck.
Replace electric load
current sensor.
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