Test Description
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step tests for voltage at the ignition 3 voltage side of the transfer case select switch.
- 3: This step tests the control circuit of the Neutral indicator for a short to voltage or an open.
- 4: This step tests the control circuit of the Neutral indicator for a short to ground.
DTC B0790
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Transfer Case Control Schematics Connector End View Reference: Transfer Case Control Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Step 3 | Go to Step 6 |
| 3 | Test the Neutral indicator control circuit for a short to voltage or an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 9 | Go to Step 4 |
| 4 | Test the control circuit of the Neutral indicator for a short to ground. Refer to Testing for Short to Ground
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the transfer case shift control module, and the transfer case shift control switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 9 | Go to Step 7 |
| 6 | Test the Neutral feed circuit of the transfer case select switch for an open, high resistance or short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 9 | - |
| 7 | Replace the transfer case select switch, and clear all DTCs. Refer to Transfer Case Shift Control Switch Replacement . Does the DTC reset? |
Go to Step 8 | System OK |
| 8 | Replace the transfer case shift control module. Refer to Control Module References
for replacement, setup and programming. Did you complete the repair? |
Go to Step 9 | - |
| 9 |
|
Go to Step 1 | System OK |