Perkins 1104E Series Troubleshooting Manual page 214

214
Troubleshooting Section
Results:
•
OK – Proceed to Test Step 2.
•
Not OK
Repair: Repair the circuit.
Verify that the repair eliminates the problem.
STOP.
Test Step 2. Check "Throttle Switch
Position" on the Electronic Service Tool
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the
diagnostic connector.
C. Turn the keyswitch to the ON position.
D. Observe the status of the throttle switch and the
throttle inputs on the electronic service tool while
you operate the throttle switch in each position.
Expected Result:
The status on the electronic service tool should
correspond with the information in Table 13.
Results:
•
OK – The throttle switch is functioning properly
at this time.
Repair: Refer to Troubleshooting, "Electrical
Connectors - Inspect" if the problem is intermittent.
STOP.
•
Not OK – Record the suspect input. Proceed to
Test Step 3.
Test Step 3. Jumper the Switch Input at
the Suspect Throttle Position Switch
A. Turn the keyswitch to the OFF position.
B. Observe the status of the suspect throttle input on
the electronic service tool.
C. Use a suitable piece of wire to short P/20:37
Switch Return to the terminal for the suspect
throttle input.
D. Observe the status of the suspect throttle input on
the electronic service tool.
E. Remove the wire short.
Expected Result:
The status of the suspect throttle input should be
"OFF" when the jumper wire is disconnected. The
status should be "ON" when the jumper wire is
connected.
Results:
•
OK – The harness and the ECM are OK.
Repair: Replace the throttle switch.
Verify that the repair eliminates the problem.
STOP.
•
Not OK – Proceed to Test Step 4.
RENR2696-01