Table 212
Troubleshooting Test Steps
Values Results
1. Check for Diagnostic Codes
A. Establish communication between the electronic service tool and
the ECM . Refer to Troubleshooting, “Electronic Service Tools”, if
necessary.
B. Turn the keyswitch to the ON position.
C. Look for a -3, or -4 active or logged codes:
Diagnostic
code
Result: There are no active diagnostic codes for the
active sensors.
Repair: If there are logged diagnostic codes for the ac-
tive sensors, the fault may be intermittent.
Refer to Troubleshooting, “Electrical Connectors - In-
spect” to identify intermittent faults.
Result: A diagnostic code that is listed in Table 211 is
active.
Proceed to Test Step 2.
2. Check the 5 VDC Supply Voltage at the Sensor Connector
A. Turn the keyswitch to the ON position.
B. Measure the voltage between the sensor supply pin and the sen-
sor return pin at the suspect sensor.
Test passed Result: The supply voltage is approximately 5.0 ± 0.2
VDC
Connect the sensor and then proceed to Test Step 3.
Result: The supply voltage is not approximately 5.0 ±
0.2 VDC.
There is a short in the harness to the battery. Repair
the wiring or replace the harness
Verify that the problem is resolved.
(continued)
UENR4469-36 387
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
