Diagnostic Aids
WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the connectors at the TCM, the AT ISS, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
- Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
- Road test the vehicle while monitoring the Transmission ISS parameter on the scan tool. The Transmission ISS parameter should vary with engine speed changes and not abruptly drop out.
- Inspect for an open or shorted AT ISS wire.
- Inspect for a disconnected AT ISS connector.
- Inspect for a faulty AT ISS.
DTC P0716
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
IMPORTANT:
Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data.
|
1300 RPM | Go to Step 3 | Go to Diagnostic Aids |
| 3 |
|
12 V | Go to Step 4 | Go to Step 7 |
| 4 | Measure the voltage from the AT ISS 12-volt reference circuit to the AT ISS low reference circuit, at the AT 20-way connector, engine harness side. Does the voltage measure near the specified value and not fluctuate? |
12 V | Go to Step 5 | Go to Step 8 |
| 5 |
|
602 RPM | Go to Step 9 | Go to Step 6 |
| 6 | Test the AT ISS signal circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 7 | Test the AT ISS 12-volt reference circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 8 | Test the AT ISS low reference circuit for an open or a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 9 | Test the AT ISS internal transmission harness for the following conditions:
Refer to Circuit Testing . Did you find a condition? |
- | Go to Step 11 | Go to Step 10 |
| 10 |
|
- | Go to Step 14 | Go to Step 12 |
| 11 | Replace the internal transmission harness. Refer to Valve Body and Pressure Switch Replacement
. Did you complete the action? |
- | Go to Step 14 | - |
| 12 | Replace the AT ISS. Refer to Oil Pump Disassemble
. Did you complete the replacement? |
- | Go to Step 14 | - |
| 13 | Replace the TCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 14 | - |
| 14 | Perform the following procedure In order to verify the repair:
Has the test run and passed? |
- | Go to Step 15 | Go to Step 2 |
| 15 | With the scan tool, observe the stored information, capture info and DTC info. Does the scan tool display any DTCs that you have not diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |