Circuit Description
The memory seat module (MSM) supplies a 5 volt reference voltage to all of the seat position sensors from connector C1 cavity 13 (GRY).
Conditions for Setting the DTC
The 5-volt feed voltage falls out of the range of 4.6-5.2 volts.
Action Taken When the DTC Sets
The MSM does not allow any memory recall function. Only manual seat movement is allowed. Only one seat motor moves at a time.
Conditions for Clearing the DTC
The 5-volt feed voltage is within a valid operating range during the last monitoring cycle.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for a short to ground in CKT 788 (GRY).
-
This step tests for a short to battery positive voltage (B+) in CKT 788 (GRY).
-
This step tests for an open in CKT 788 (GRY).
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the entire Power Seat Systems Diagnostic System Check performed? | -- | Go to Step 2 | ||
Is the voltage near the specified value? | 0 V | Go to Step 6 | Go to Step 3 | |
Is the voltage near the specified value? | 12 V | Go to Step 7 | Go to Step 4 | |
4 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 5 | Go to Step 8 |
5 | Replace the MSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | -- | Go to Step 9 | -- |
6 | Repair the open or short to ground in CKT 788 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 9 | -- |
7 | Repair the short to battery positive voltage (B+) in CKT 788 (GRY). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 9 | -- |
8 | Repair the open in CKT 788 (GRY) between the MSM and S348. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 9 | -- |
9 | Clear the DTCs from memory. Is the action complete? | -- | -- |
