(Table 196, contd)
Troubleshooting Test Steps
Values Results
3. Measure the Sensor Supply Voltage at the Valve
Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect valve from the engine harness.
C. Turn the keyswitch to the ON position.
D. Measure the voltage at the harness connector for the valve
from the 5 VDC supply terminal of the position sensor to the
sensor ground terminal.
4.84 to 5.16 VDC Result: The voltage from the terminal for the 5 VDC supply
to the sensor common terminal measures 4.84 to 5.16
VDC.
Repair: Reconnect the suspect valve. Operate the engine
for enough time to allow the engine to reach normal operat-
ing temperature. The suspect valve may be not responding
due to frozen condensation.
Use the electronic service tool to run the “Air System Motor
Valves Verification Test” .
If the fault is cleared, return the engine to service.
If the -7, E1263 (2), or E1121 (2) code is still active, replace
the suspect valve. Refer to Disassembly and Assembly for
more information.
Use the electronic service tool to clear all logged diagnostic
codes and then verify that the repair eliminates the fault.
Result: The sensor supply voltage is out of the nominal
range. A 5 VDC supply diagnostic code is active. The fault
is in the 5 VDC supply wire or the ground wire in the engine
harness.
Repair: Repair the faulty wiring or replace the faulty
harness.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
4. Create a Short Circuit at the Valve Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the suspect valve.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Install the jumper between the signal and return pins on the
connector for the suspect valve to create a short circuit.
E. Turn the keyswitch to the ON position. Check for active di-
agnostic codes on the electronic service tool.
F. Remove the jumper wire from the connector for the motor-
ized valve.
Open circuit Result: A -6 diagnostic code is active when the jumper wire
is installed. A -5 diagnostic code is active with the jumper
removed.
Repair: Reconnect the valve.
Check for active diagnostic codes on the electronic service
tool. Wait at least 30 seconds in order for the codes to be
displayed.
If the -5 diagnostic code returns, then replace the valve. Re-
fer to Disassembly and Assembly for the correct procedure.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: A -5 diagnostic code is still active with the jumper
installed.
Proceed to Test Step 5.
(continued)
UENR4469-36 359
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
