Engine Temperature Sensor Open Or Short Circuit - Test - Perkins 1104E Series Troubleshooting Manual

RENR2696-01
Test Step 6. Check the Continuity of
the Cables From the ECM to the Fuel
Injection Pump
A. Turn the keyswitch to the OFF position.
B. Disconnect the J1/P1 ECM connector and the
J40/P40 fuel injection pump connector.
Illustration 84
Fuel pump power supply
C. Perform a continuity test between P40:8 fuel
injection pump connector and the following
terminals:
•
P40:1
•
P40:2
• P40:5
•
P40:6
•
P40:7
Expected Result:
The continuity check is positive.
Results:
• OK – There is a fault with the cables between the
fuel injection pump and/or the ECM.
Repair: Replace the cable.
Verify that the repair eliminates the problem.
STOP.
•
Not OK – The ECM is suspect.
Repair: Verify that the repair eliminates the
problem.
1. Temporarily install a test ECM.
Note: The test ECM should be programmed with the
correct software. All parameters should be set to the
same value as the suspect ECM.
2. If the fault is eliminated with the test ECM,
reconnect the suspect ECM.
3. If the fault returns with the suspect ECM, then
the suspect ECM is faulty.
4. Replace the suspect ECM.
STOP.
Engine Temperature Sensor
Open or Short Circuit - Test
System Operation Description:
g00863550
Use this procedure under the following
conditions:
Use this procedure to troubleshoot the system only
when there is an active diagnostic code or when
a diagnostic code can easily be activated. This
procedure covers open circuit diagnostic codes and
short circuit diagnostic codes that are associated with
the following sensors:
•
Coolant temperature sensor
•
Intake manifold air temperature sensor
The following background information is related
to this procedure:
The troubleshooting procedures for the diagnostic
codes of each temperature sensor are identical.
The temperature sensors are sensors that have two
terminals. The temperature sensors do not require
supply voltage from the Electronic Control Module
(ECM). ECM connector J1/P1 terminal 34 is the
common connection for the engine temperature
sensors. The sensor common connection is shared
between all of the temperature sensors. The common
line is connected to each sensor connector terminal
2. Terminal 1 is the sensor output. The signal voltage
from terminal 1 of each sensor is supplied to the
appropriate terminal at ECM Connector J1/P1.
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Troubleshooting Section
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