Circuit Description
This circuit monitors the Delivered Trottle Position Input for proper operation.
Conditions for Setting the DTC
DTC C0266 can set anytime the ignition is in the RUN position and the EBCM does not recieve a Delivered Throttle Position Input.
Action Taken When the DTC Sets
| • | The TCS is disabled |
| • | The traction control indicator is turned on |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the scan tool clear DTC function is used |
| • | 100 ignition cycles have passed with no DTCs detected |
Diagnostic Aids
| • | Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction. |
| • | If an intermittent malfunction exists, refer to Inducing Intermittent Fault Conditions in Electrical Diagnosis. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 |
Is there any evidence of damage or corrosion? | -- | ||
Using the J 39200 DMM, measure the resistance between the ASM harness connector terminal 28 and a good ground. Is the resistance within specifications? | 0-5 ohms | |||
4 | Using the J 39200 DMM, measure the resistance between the ASM harness connector terminal 55 and a good ground. s the resistance within specifications? | 0-5 ohms | ||
Is the voltage within specifications? | B+ | |||
6 | Repair CKT 739 for an open or high resistance. Refer to Wiring Repairs . Is the circuit repair complete? | -- | -- | |
7 | Repair as necessary. Are the repairs complete? | -- | -- | |
8 | Repair the open or high resistance in CKT 151. Refer to Wiring Repairs . Is the circuit repair complete? | -- | -- | |
9 | Replace the ASM. Refer to Accelerator and Servo Control Module Replacement . Is the replacement complete? | -- | -- | |
10 |
Is the resistance within the range specified in the value(s) column? | OL (infinite) | ||
11 | Repair CKT 464 for a short to ground. Refer to Wiring Repairs . Is the circuit repair complete? | -- | -- | |
12 | Using J 39200 DMM, measure the resistance between terminal 9 of J 39700 and terminal 35 of the ASM harness connector. Is the resistance within the range specified in the value(s) column? | 0-5ohms | ||
13 | Repair the open or high resistance in CKT 464. Refer to Wiring Repairs . Is the circuit repair complete? | -- | -- | |
14 |
Is the voltage within the range specified in the value(s) column? | Above 1V | ||
15 | Repair CKT 464 for a short to voltage Wiring Repairs . Is the circuit repair complete? | -- | -- |
