• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Seat Adjuster Memory Switch 12 Volt Reference | B3907 02, 1 | 1 | -- | -- |
Memory Seat Switch Signal 1 | 1 | 1 | B1390 01 | -- |
Memory Seat Switch Signal 2 | 1 | 1 | B1400 01 | -- |
Memory Seat Switch Signal 3 | 1 | 1 | B1410 01 | -- |
Memory Mirror Switch Signal | 1 | 1 | B2765 01 | 1 |
1. Memory recall is inoperative |
Reference voltage from the seat interface module (SIM) is supplied at all times to the memory seat switch. When a memory recall switch is pressed, reference voltage is applied through the switch contacts and the signal circuit to the SIM indicating the memory recall request. The SIM serves as a interface and applies a reference voltage through the appropriate memory signal circuit to the memory seat module (MSM) indicating the memory seat request. The MSM then commands the driver seat motors and the exterior mirrors to move to the appropriate seat and mirror positions stored in memory.
The SIM is powered.
The button PCB assembly is shorted to ground.
The memory recall function is disabled.
• | The current DTC clears when the fault is no longer present. |
• | The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred. |
Memory Seats Description and Operation
Control Module References for scan tool information
Ignition ON, observe the scan tool SIM Input parameters listed below while pressing the appropriate memory 1, 2, 3, and M switches. The readings should change between Inactive and Active.
• | Button 1 Input Status |
• | Button 2 Input Status |
• | Button 3 Input Status |
• | Button M Input Status |
⇒ | If the test lamp does not illuminate, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the SIM. |
• | Button 1 Input Status |
• | Button 2 Input Status |
• | Button 3 Input Status |
• | Button M Input Status |
⇒ | If not the specified value, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the SIM. |
• | Button 1 Input Status |
• | Button 2 Input Status |
• | Button 3 Input Status |
• | Button M Input Status |
⇒ | If not the specified value, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the SIM. |
• | Memory 1 terminal 1 |
• | Memory 2 terminal 2 |
• | Memory 3 terminal 3 |
• | Memory M terminal 4 |
⇒ | If not the specified value, replace the memory seat switch. |
• | Memory 1 terminal 1 |
• | Memory 2 terminal 2 |
• | Memory 3 terminal 3 |
• | Memory M terminal 4 |
⇒ | If greater than the specified range, replace the memory seat switch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for SIM and MSM replacement, setup, and programming |