Chrysler 300M 1999 Manual page 446

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TEST 1A
IDENTIFYING MEMORY SYSTEM PROBLEMS
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Perform TEST SYMPTOM IDENTIFICATION 1A Before Proceeding
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TEST 1A IDENTIFYING MEMORY HEATED SEAT/MIRROR PROBLEMS
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Diagnostics for the memory system are trouble code (DTC) driven. Almost all problems will have a
code to aide in diagnosis. Most codes will remain in memory for 20 ignition starts which can help in
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diagnosing intermittent problems.
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1. Ensure there is communication with the DRB, the Body Control Module (BCM), the Powertrain
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Control Module (PCM) and the Memory Heated Seat/Mirror Module (MHSMM). If any
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communication problems, perform . . . . . . . . . . . . . . . . . . ."Vehicle Communication" TEST 1A.
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2. Using the DRB select ''Body Computer'', ''Memory Seat Module'' and ''Read DTC's''
• If no codes are present - monitor the DRB for ''DTC's'' and operate all movements from the
switches and the RKE, reset both memory positions and operate the seat heaters. If there
are still no codes present yet a problem exists, using the DRB perform the ''Switch Self
Test'' and refer to the appropriate service manual for diagnostic procedures.
• If codes are present - record the codes then erase them. Monitor the DRB for ''DTC's'' and
operate all movements from the switches and the RKE, reset both memory positions and
operate the seat heaters. When the first code appears, stop and perform the respected
repair procedure from the list below.
• If there are no codes present, proceed to step 3.
TROUBLE CODE
• EEPROM Refresh Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace MHSMM
• Ignition Status Message Not Received . . . . . . . . . . . . . . . .''Vehicle Communication'' TEST 14A
• PRNDL Display Message Not Received . . . . . . . . . . . . . . .''Vehicle Communication'' TEST 10A
• Front Riser Down Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 2A
• Front Riser Up Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 3A
• Front Riser Sensor Out of Range Low. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 4A
• Front Riser Sensor Out of Range High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 5A
• Rear Riser Down Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 6A
• Rear Riser Up Position Stuck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 7A
• Rear Riser Sensor Out of Range Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 8A
• Rear Riser Sensor Out of Range High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 9A
• Horizontal Forward Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 10A
• Horizontal Rearward Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 11A
• Horizontal Sensor Out of Range Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 12A
• Horizontal Sensor Out of Range High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 13A
• Recliner Down Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 14A
• Recliner Up Position Stuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 15A
• Recliner Sensor Out of Range Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 16A
• Recliner Sensor Out of Range High. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 17A
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PERFORM