MSM

B210E-BATTERY VOLTAGE HIGH - MSM





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .


- When Monitored:
Engine running, during seat operation.

- Set Condition:
This code is set immediately after the Memory Seat Module (MSM) receives a high charging system voltage message over the CAN Interior Bus or detects voltage over 16.5 volts on the (A210) Fused B(+) circuit.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview


Diagnostic Test


1. CHECK PCM/ECM FOR CHARGING SYSTEM DTC
With the scan tool, read Powertrain Control Module DTC's.
Are there any Charging System DTC's set in the Powertrain Control Module?

Yes


- Diagnose and repair the DTC(s).


No


- Go To 2


2. TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC's
Turn the ignition switch to the OFF position then start the engine and let run for one minute.
Attempt to operate the Driver Power Seat.
With the scan tool, read DTC's.
Does the scan tool display active this DTC?

Yes


- Go To 3


No


- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test.


3. CHECK THE VOLTAGE ON THE (A210) FUSED B(+) CIRCUIT




Turn the ignition off.
Disconnect the Memory Seat Module harness connector.
Start the engine and let idle.
Measure the voltage on the (A210) Fused B(+) circuit at the Memory Seat Module harness connector and compare to voltage at the vehicles battery.
Is the voltage at the Memory Seat Module connector the same as measured at the battery?

Yes


- Replace the Memory Seat Module.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test.


No


- Repair the (A210) Fused B(+) circuit as necessary.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test.