Circuit Description
Normal vehicle Class 2 communication does not begin until the system power mode has been identified. The dash integration module (DIM) monitors four discrete wires from the ignition switch contacts in order to determine the present power mode (ignition switch position). The DIM communicates the system power mode to all Class 2 modules on the Class 2 serial data line.
Conditions for Running the DTC
The DIM must be powered.
Conditions for Setting the DTC
One of the four monitored ignition switch circuits has malfunctioned.
Action Taken When the DTC Sets
The DIM implements default actions for each ignition switch position when faults are detected.
Conditions for Clearing the MIL/DTC
The power moding malfunction must be corrected.
Diagnostic Aids
| • | The following may cause an intermittent: |
| - | A bent terminal |
| - | A backed out terminal |
| - | A damaged terminal |
| - | Poor terminal tension |
| - | A chafed wire |
| - | A broken wire inside the insulation |
| • | When diagnosing for an intermittent short or an open, massage the wire harness while watching the test equipment for changes. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform Diagnostic System Check - Body Control System ? | -- | Go to Step 2 | |
2 |
Do all of the ignition switch parameters display Inactive? | -- | Go to Step 3 | Go to Step 7 |
3 |
Do all of the ignition switch parameters display Active? | -- | Go to Step 4 | Go to Step 9 |
4 |
Do only the Run/Crank and Ign. Unlock parameters display Active? | -- | Go to Step 5 | Go to Step 7 |
5 |
Does only the Ign. Unlock parameter display Active? | -- | Go to Step 6 | Go to Step 7 |
6 |
Does only the Ign. Accessory parameter display Active? | -- | Go to Step 11 | Go to Step 7 |
Does the previously Active state change to Inactive? | -- | Go to Step 10 | Go to Step 8 | |
8 | Test the active power moding signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 11 |
9 | Test the inactive power moding signal circuit for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 11 |
10 | Inspect for poor connections at the harness connector of the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the dash integration module (DIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 13 |
12 | Replace the ignition switch. Refer to Ignition Switch Replacement. Did you complete the replacement? | -- | Go to Step 14 | -- |
13 | Replace the DIM. Important:: Complete the set up procedures for the DIM. Did you complete the replacement. | -- | Go to Step 14 | -- |
14 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
