
Table 100
Troubleshooting Test Steps
Values
Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Check the connectors and the harness for the following
faults:
·
Abrasion
·
Corrosion
·
Incorrect attachment
Refer to Troubleshooting, “Electrical Connectors - Inspect”.
C. Perform a 30 N (6.7 lb) pull test on each of the wires in the
harness that are associated with the throttle position sensor.
Check the wire connectors at the ECM and at the throttle
sensor.
D. Check the harness for abrasions and for pinch points from
the sensors back to the ECM.
Damaged wire
or connector
Result:
A damaged wire or damaged connector was found.
Repair the damaged wire or the damaged connector. Replace
any blown fuses
Use the electronic service tool to clear all logged diagnostic co-
des. Verify that the repair eliminates the fault.
Result:
All connectors, pins, and sockets are correctly con-
nected and/or inserted and the harness is free of corrosion, of
abrasion or of pinch points.
Proceed to Test Step 2.
2. Check For Active Diagnostic Codes
A. Turn the keyswitch to the ON position.
B. Use the electronic service tool to check for diagnostic
codes.
Diagnostic
codes
Result:
One or more of the diagnostic codes that are listed in
Table 99 is active or recently logged.
Proceed to Test Step 5.
Result:
There are no active or recently logged diagnostic co-
des for the analog throttle position sensors.
Proceed to Test Step 3.
3. Check the Throttle Position with the Electronic Service
Tool
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position. Do not start the
engine.
C. Observe the throttle position reading on the throttle status
screens in the electronic service tool.
D. Operate the throttle over the full range of movement.
0 percent at low
idle
100 percent at
high idle
Result:
The throttle output is 0 percent at low idle and 100 per-
cent at high idle.
Proceed to Test Step 4.
Result:
The throttle output is not correct.
Use the electronic service tool to verify that the throttle has
been configured correctly before continuing with this procedure.
For information on the parameters that can be configured, refer
to Troubleshooting, “Throttle Setup”.
If the fault is still present after the throttle has been configured
correctly, replace the analog throttle position sensor.
(continued)
UENR0612
207
This document has been printed from SPI2. NOT FOR RESALE