Memory Seat Module (Msmd) - Electrical Diagnostics: Diagnosis RAM Pickup 3500

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Scheme 179

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition from on to off. Turn the ignition on. Operate the Adjustable Pedals switch in both directions then wait 5 seconds. With the scan tool, read DTCs. Does the scan tool display DTC B1D5B-ADJUSTABLE PEDAL SWITCH CIRCUIT PERFORMANCE? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Perform the APS INTERMITTENT CONDITION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
2. CHECK THE (Q102)/(Q103) ADJUSTABLE PEDALS SWITCH FORWARD/REARWARD CIRCUITS FOR A SHORT TOGETHER, TO GROUND, OR TO (Z910) GROUND CIRCUIT Turn the ignition off. Disconnect the MSM C5 harness connector. Disconnect the Adjustable Pedals switch harness connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance between the (Q102) Adjustable Pedals Switch Forward circuit and the (Q103) Adjustable Pedals Switch Rearward circuit at the Adjustable Pedals switch harness connector. Measure the resistance of the (Q102) Adjustable Pedals Switch Forward circuit between ground and the Adjustable Pedals switch harness connector. Measure the resistance of the (Q103) Adjustable Pedals Switch Rearward circuit between ground and the Adjustable Pedals switch harness connector. Measure the resistance between the (Q102) Adjustable Pedals Switch Forward circuit and the (Z910) Ground circuit at the Adjustable Pedals switch harness connector. Measure the resistance between the (Q103) Adjustable Pedals Switch Rearward circuit and the (Z910) Ground circuit at the Adjustable Pedals switch harness connector. Is the resistance below 10K Ohms for any measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to one another/to ground or (Z910) Ground circuit. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK FOR A SHORTED ADJUSTABLE PEDALS SWITCH Remove the Adjustable Pedals Switch in accordance with the Service Information. Measure the resistance between the (Q102) Adjustable Pedals Switch Forward circuit and the (Q103) Adjustable Pedals Switch Rearward circuit at the Adjustable Pedals Switch (component) connector. Measure the resistance between the (Q102) Adjustable Pedals Switch Forward circuit and the (Z910) Ground circuit at the Adjustable Pedals Switch (component) connector. Measure the resistance between the (Q103) Adjustable Pedals Switch Rearward circuit and the (Z910) Ground circuit at the Adjustable Pedals Switch (component) connector. Is the resistance below 10K Ohms for any measurement? Yes Replace the Adjustable Pedals Switch in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 180

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. INSPECT DRIVER SEAT SWITCH FOR DAMAGE Turn the ignition off. Inspect the Driver Seat Switch for damage. Is the switch damaged? Yes Replace the Driver Seat Switch in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. INSPECT FOR OBJECT OR SUBSTANCE CAUSING DRIVER SEAT SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the Driver Seat Switch for anything that would cause it to stay or stick in a pushed position. Is anything present that would cause the switch to stay or stick in a pushed position? Yes Repair as necessary. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Press the Driver Seat Switch in all directions several times then wait one minute. Using a scan tool, read DTCs. Does the scan tool display DTC B1D62-POWER SEAT SWITCH STUCK? Yes Replace the Driver Seat Switch in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 181

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. CHECK FOR SEAT POSITION SENSOR AND CIRCUIT PERFORMANCE DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display any seat position sensor or circuit performance DTCs? Yes Diagnose and repair all seat position sensor and circuit performance DTCs. Refer to «Diagnosis and Testing»(ref-457886-S15824190502012030200000) . No Go To 2 .
2. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Move the seat switch in the full forward horizontal adjust position. Using a scan tool, read DTCs. Does the scan tool display DTC B1D9B-SEAT HORIZONTAL FRONT STOP NOT LEARNED? Yes Using a scan tool, perform the MSM Standard Routine. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 182

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read Powertrain Control Module (PCM) DTCs. Are there any Charging System DTCs set in the PCM? Yes Refer to «MODULE, POWERTRAIN CONTROL»(ref-457810-S40712881722012030200000) and perform the appropriate diagnostic procedure. . No Go To 2 .
2. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Turn the ignition off. Start the engine and let run for one minute. Operate the driver power seat. Using a scan tool, read DTCs. Does DTC B210E-BATTERY VOLTAGE HIGH reset? Yes Go To 3 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
3. CHECK (A907) FUSED B(+) CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Memory Seat Module C1 harness connector. NOTE: Check connectors. Clean and repair as necessary. Start the engine and let idle. Measure the Voltage of the (A907) Fused B(+) circuit between the Memory Seat Module C1 harness connector and ground and compare it to the Voltage at the vehicle battery. Is the Voltage measured at the Memory Seat Module C1 connector the same as the Voltage measured at the battery? Yes Replace the Memory Seat Module (MSM) in accordance with the service information. Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Repair the (A907) Fused B(+) circuit for the cause of the high Voltage condition at the Memory Seat Module (MSM). Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition switch off and then on again. Using a scan tool, read DTCs. Does the scan tool display DTC B221C-MEMORY SEAT MODULE INTERNAL? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 183

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

This module will not be able to communicate when this fault is active and therefore will only display this DTC as stored. To diagnose this fault, use a scan tool and check for DTCs in the TIPM. If DTCs are active, and diagnose and repair the faults. Refer to appropriate Electrical Diagnostics Information . If no DTCs are active, but there are stored Lost Communication DTCs set, and diagnose and repair these faults. Refer to DIAGNOSIS AND TESTING . If no DTCs are set, perform BODY VERIFICATION TEST. Refer to appropriate Electrical Diagnostics Information .

This module will not be able to communicate when this fault is active and therefore will only display this DTC as stored. To diagnose this fault, use a scan tool and check for DTCs in the TIPM. If DTCs are active, and diagnose and repair the faults. Refer to appropriate Electrical Diagnostic Information . If no DTCs are active, but there are stored Lost Communication DTCs set, and diagnose and repair these faults. Refer to DIAGNOSIS AND TESTING . If no DTCs are set, perform BODY VERIFICATION TEST. Refer to appropriate Electrical Diagnostic Information .

This module will not be able to communicate when this fault is active and therefore will only display this DTC as stored. To diagnose this fault, use a scan tool and check for DTCs in the TIPM. If DTCs are active, and diagnose and repair the faults. Refer to appropriate Electrical Diagnostic Information . If no DTCs are active, but there are stored Lost Communication DTCs set, and diagnose and repair these faults. Refer to DIAGNOSIS AND TESTING . If no DTCs are set, perform BODY VERIFICATION TEST. Refer to appropriate Electrical Diagnostic Information .

1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding. Turn the ignition on. Using a scan tool, read DTCs. Is this DTC active? Yes Go To 2 . No Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the Stored Lost Communication DTCs diagnostic procedure.
2. VERIFY TIPM IS COMMUNICATING WITH OTHER MODULES Using a scan tool, read DTCs in all modules. Is any other module reporting a loss of communication with the TIPM? Yes Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the No Response from TIPM diagnostic procedure. No Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «BODY VERIFICATION TEST»(ref-457926-S40044966262012030200000) for 1500, 2500 & 3500, or «BODY VERIFICATION TEST»(ref-457927-S20352278932012030200000) for 3500 CAB & CHASSIS, 4500 & 5500 .

1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding. Turn the ignition on. Using a scan tool, read DTCs. Is this DTC active? Yes Go To 2 . No Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the Stored Lost Communication DTCs diagnostic procedure.
2. VERIFY CCN IS COMMUNICATING WITH OTHER MODULES Using a scan tool, read DTCs in all modules. Are any other modules reporting a loss of communication with the CCN? Yes Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the No Response from CCN diagnostic procedure. No Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «BODY VERIFICATION TEST»(ref-457926-S40044966262012030200000) for 1500, 2500 & 3500, or «BODY VERIFICATION TEST»(ref-457927-S20352278932012030200000) for 3500 CAB & CHASSIS, 4500 & 5500 .

1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding. Turn the ignition on. Using a scan tool, read DTCs. Is this DTC active? Yes Go To 2 . No Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the Stored Lost Communication DTCs diagnostic procedure.
2. VERIFY DMFL IS COMMUNICATING WITH OTHER MODULES Using a scan tool, read DTCs in all modules. Is any other module reporting a loss of communication with the DMFL? Yes Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the No Response from DMFL diagnostic procedure. No Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «BODY VERIFICATION TEST»(ref-457926-S40044966262012030200000) for 1500, 2500 & 3500, or «BODY VERIFICATION TEST»(ref-457927-S20352278932012030200000) for 3500 CAB & CHASSIS, 4500 & 5500 .

1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding. Turn the ignition on. Using a scan tool, read DTCs. Is this DTC active? Yes Go To 2 . No Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the Stored Lost Communication DTCs diagnostic procedure.
2. VERIFY DMFR IS COMMUNICATING WITH OTHER MODULES Using a scan tool, read DTCs in all modules. Is any other module reporting a loss of communication with the DMFR? Yes Refer to «DIAGNOSIS AND TESTING»(ref-457935-S18786498362012030200000) . and perform the No Response from DMFR diagnostic procedure. No Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «BODY VERIFICATION TEST»(ref-457926-S40044966262012030200000) for 1500, 2500 & 3500, or «BODY VERIFICATION TEST»(ref-457927-S20352278932012030200000) for 3500 CAB & CHASSIS, 4500 & 5500 .

APS INTERMITTENT CONDITION TEST

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

1. PERFORM APS INTERMITTENT CONDITION TEST WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. Refer to any Technical Service Bulletins (TSBs) that may apply. Review the scan tool information. If possible, try to duplicate the conditions under which the DTC set. Turn the ignition off. Visually inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed, pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals. Wiggle the wires while checking for shorts and open circuits. Perform a voltage drop test on the related circuits between the suspected faulty component and the Memory Seat Module. Inspect and clean all grounds that are related to the most current DTC. If numerous trouble codes were set, use a wiring schematic and look for any common ground or supply circuits Monitor with the scan tool and wiggle the related wire harness to try to interrupt the actuation. Use the scan tool to perform a System Test if one applies to failing component. A co-pilot, data recorder, and/or lab scope should be used to help diagnose intermittent conditions. Were any problems found during the above inspections? Yes Repair as necessary. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Test Complete.

1. PERFORM ADJUSTABLE PEDALS SYSTEM VERIFICATION TEST Make sure all accessories are turned off and the battery is fully charged. Connect all previously disconnected components and connectors. If not done previously, turn the ignition on. Using a scan tool, erase all Diagnostic Trouble Codes (DTCs) from all modules. Cycle the ignition from on to off. Turn the ignition on. Operate the Adjustable Pedals in both directions. Press the Adjustable Pedals switch in one direction for at least one second then release the switch. Repeat three times consecutively, but press the switch in the opposite direction each time. Using a scan tool, read DTCs from all modules. Are any DTCs present or is the original concern still present? Yes Repair is not complete. Refer to appropriate system for the diagnostic procedure. No Repair is complete.

1. PERFORM POWER SEAT SYSTEM VERIFICATION TEST Disconnect all jumper wires and reconnect all previously disconnected components and connectors. Make sure that all accessories are turned off. Make sure that the battery is fully charged. Turn the ignition on. If either the Memory Seat Module (MSM) or the Driver Horizontal Seat Adjuster Motor/Seat Track was replaced, then the MSM Standard Routine must be performed using a scan tool. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs) from all modules. Operate the driver seat in all positions. Using the Memory Switch on the driver's door, program the driver's seat number 1 Button to a desired position and driver's seat number 2 Button to a different position. Verify both Memory positions can be recalled with the Remote Keyless Entry (RKE) transmitter and the Memory Switch on the driver's door. Turn the ignition off, wait 10 seconds, then turn the ignition on. Using a scan tool, select ECU View. Check for DTCs in the modules. Are DTCs present in any of the modules or is the original condition still present? Yes The repair is not complete. Refer to the related category for the DTC or symptom that is still present. No The repair is complete.