Memory Seat Module (Msmd) - Electrical Diagnostics: Other RAM Pickup 2500

When Monitored

Continuously.

Set Condition

The Voltage on the (G13) Adjustable Pedals Sensor Supply circuit is not within a specified range. The Memory Seat Module (MSM) will not be able to detect pedal position. When the Adjustable Pedals switch is pressed, the pedals will move for approximately two seconds then the module turns off the output.

Possible Causes

Scheme 184

Scheme 185

Scheme 186

1. CHECK FOR ACTIVE FAULT WITH PEDALS STATIONARY Turn the ignition on. Using a scan tool, record and erase DTCs. Cycle the ignition from on to off. Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display DTC B1D56-ADJUSTABLE PEDAL SENSOR CIRCUIT LOW? Yes Go To 3 . No Go To 2 .
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE PEDALS Operate the Adjustable Pedals switch in both positions then wait five seconds. Using a scan tool, read DTCs. Does the scan tool display DTC B1D56-ADJUSTABLE PEDAL SENSOR CIRCUIT LOW? Yes Go To 3 . 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) .
3. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the MSM C2 harness connector. Disconnect the Adjustable Pedals Motor harness connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G13) Adjustable Pedals Sensor Supply circuit between ground and the Adjustable Pedals Motor harness connector. Is the resistance below 10K Ohms? Yes Repair the (G13) Adjustable Pedals Sensor Supply circuit for a short to ground. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR A SHORT TO THE (G493) POSITION SENSOR GROUND CIRCUIT, THE (P205) ADJUSTABLE PEDALS MOTOR FORWARD CIRCUIT, OR THE (P206) ADJUSTABLE PEDALS MOTOR REARWARD CIRCUIT Measure the resistance between the (G13) Adjustable Pedals Sensor Supply circuit and the (G493) Position Sensor Ground circuit at the Adjustable Pedals Motor harness connector. Measure the resistance between the (G13) Adjustable Pedals Sensor Supply circuit and the (P205) Adjustable Pedals Motor Forward circuit at the Adjustable Pedals Motor harness connector. Measure the resistance between the (G13) Adjustable Pedals Sensor Supply circuit and the (P206) Adjustable Pedals Motor Rearward circuit at the Adjustable Pedals Motor 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 the (G13) Adjustable Pedals Sensor Supply circuit. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY AND (G493) POSITION SENSOR GROUND CIRCUIT FUNCTION Reconnect the MSM C2 harness connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G13) Adjustable Pedals Sensor Supply circuit and the (G493) Position Sensor Ground circuit at the Adjustable Pedals Motor harness connector. While monitoring the test light, press the Adjustable Pedals switch in either direction then release the switch. Does the test light illuminate for approximately six seconds then turn off? Yes Replace the Adjustable Pedals Sensor 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) .

B1D57-ADJUSTABLE PEDAL SENSOR CIRCUIT HIGH

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

Continuously.

If Voltage on the (G13) Adjustable Pedals Sensor Supply circuit is not within a specified range. The Memory Seat Module (MSM) will not be able to detect pedal position. When the Adjustable Pedals switch is pressed, the pedals will move for approximately two seconds then the module turns off the output.

Scheme 187

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Scheme 191

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase DTCs. Cycle the ignition from on to off. Turn the ignition on. Operate the Adjustable Pedals switch in both positions then wait five seconds. Using a scan tool read DTCs. Does the scan tool display DTC B1D57-ADJUSTABLE PEDAL SENSOR CIRCUIT HIGH? 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 (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Adjustable Pedals Motor harness connector. Disconnect the MSM C2 harness connector. NOTE: Check connectors. Clean and repair as necessary. Turn the ignition on. Measure the Voltage of the (G13) Adjustable Pedals Sensor Supply circuit between the Adjustable Pedals Motor harness connector and ground. Is there any Voltage present? Yes Repair the (G13) Adjustable Pedals Sensor Supply circuit for a short to Voltage. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR A SHORT TO THE (P205) ADJUSTABLE PEDALS MOTOR FORWARD CIRCUIT OR THE (P206) ADJUSTABLE PEDALS MOTOR REARWARD CIRCUIT Turn the ignition off. Disconnect the MSM C1 harness connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance between the (G13) Adjustable Pedals Sensor Supply circuit and the (P205) Adjustable Pedals Motor Forward circuit at the Adjustable Pedals Motor harness connector. Measure the resistance between the (G13) Adjustable Pedals Sensor Supply circuit and the (P206) Adjustable Pedals Motor Rearward circuit at the Adjustable Pedals Motor harness connector. Is the resistance below 10K Ohms for either measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to the (G13) Adjustable Pedals Sensor Supply circuit. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR AN OPEN Measure the resistance of the (G13) Adjustable Pedals Sensor Supply circuit between the MSM C2 connector and the Adjustable Pedals Motor harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (G13) Adjustable Pedals Sensor Supply circuit for an open. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (G493) POSITION SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G493) Position Sensor Ground circuit between the MSM C2 connector and the Adjustable Pedals Motor harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (G493) Position Sensor Ground circuit for an open. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
6. CHECK THE (G13) ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FUNCTION Reconnect the MSM C1 harness connector. Reconnect the MSM C2 harness connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect the positive lead of a voltmeter to the (G13) Adjustable Pedals Sensor Supply circuit and the negative lead to the (G493) Position Sensor Ground circuit at the Adjustable Pedals Motor harness connector. While monitoring the voltmeter, press the Adjustable Pedals switch in either direction then release the switch. Does the Voltage drop to 0 Volts after approximately 6 second? Yes Replace the Adjustable Pedals Sensor in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Check the (G13) Adjustable Pedals Sensor Supply circuit for a short to Voltage from another circuit and repair as necessary. If circuit is okay, replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D5B-ADJUSTABLE PEDAL SWITCH CIRCUIT PERFORMANCE

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

Continuously.

The Memory Seat Module (MSM) receives a conflicting input from the Adjustable Pedals switch following an Adjustable Pedals switch activation.

Continuously.

The Memory Seat Module (MSM) detects that the Adjustable Pedals Switch has been activated for more than 50 seconds.

Scheme 192

Scheme 193

1. INSPECT THE ADJUSTABLE PEDALS SWITCH FOR DAMAGE Turn the ignition off. Inspect the Adjustable Pedals switch for damage. Is the switch damaged? 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 Go To 2 .
2. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE ADJUSTABLE PEDALS SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the Adjustable Pedals switch for anything that would cause it to stay or stick in a pushed position. Is anything present that would cause the Adjustable Pedals switch to stay or stick in a pushed position? Yes Repair as necessary. Perform he APS 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). Cycle the ignition from on to off. Turn the ignition on. Operate the Adjustable Pedals switch in both directions then wait one minute. With the scan tool, read DTCs. Does the scan tool display DTC B1D5-ADJUSTABLE PEDAL SWITCH CIRCUIT STUCK FORWARD? Yes Go To 4 . 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) .
4. CHECK THE (Q102) ADJUSTABLE PEDALS SWITCH FORWARD CIRCUIT FOR A SHORT TO GROUND 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 of the (Q102) Adjustable Pedals Switch Forward circuit between ground and the Adjustable Pedals switch harness connector. Is the resistance below 10K Ohms? Yes Repair the (Q102) Adjustable Pedals Switch Forward circuit for a short to ground. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (Q102) ADJUSTABLE PEDALS SWITCH FORWARD CIRCUIT FOR A SHORT TO THE (Z910) GROUND CIRCUIT Measure the resistance between the (Q102) Adjustable Pedals Switch Forward circuit and the (Z910) Ground circuit at the Adjustable Pedals switch harness connector. Is the resistance below 10K Ohms? Yes Repair the short between the (Q102) Adjustable Pedals Switch Forward circuit and the (Z910) Ground circuit. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 6 .
6. CHECK FOR A SHORTED ADJUSTABLE PEDALS SWITCH Remove the Adjustable Pedals Switch in accordance with the Service Information. NOTE: Adjustable Pedals Switch (harness) connector shown in illustration. Mirror image for 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. Is the resistance below 10K Ohms? 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) .

B1D5D-ADJUSTABLE PEDAL SWITCH CIRCUIT STUCK REARWARD

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

Continuously.

The Memory Seat Module (MSM) detects that the Adjustable Pedals Switch has been activated for more than 50 seconds.

Scheme 194

Scheme 195

1. INSPECT THE ADJUSTABLE PEDALS SWITCH FOR DAMAGE Turn the ignition off. Inspect the Adjustable Pedals switch for damage. Is the switch damaged? 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 Go To 2 .
2. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE ADJUSTABLE PEDALS SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the Adjustable Pedals switch for anything that would cause it to stay or stick in a pushed position. Is anything present that would cause the Adjustable Pedals switch to stay or stick in a pushed position? Yes Repair as necessary. Perform the APS 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). Cycle the ignition from on to off. Turn the ignition on. Operate the Adjustable Pedals switch in both directions then wait one minute. With the scan tool, read DTCs. Does the scan tool display DTC B1D5D-ADJUSTABLE PEDAL SWITCH CIRCUIT STUCK REARWARD? Yes Go To 4 . 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) .
4. CHECK THE (Q103) ADJUSTABLE PEDALS SWITCH REARWARD CIRCUIT FOR A SHORT TO GROUND 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 of the (Q103) Adjustable Pedals Switch Rearward circuit between ground and the Adjustable Pedals switch harness connector. Is the resistance below 10K Ohms? Yes Repair the (Q103) Adjustable Pedals Switch Rearward circuit for a short to ground. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (Q103) ADJUSTABLE PEDALS SWITCH REARWARD CIRCUIT FOR A SHORT TO THE (Z910) GROUND CIRCUIT Measure the resistance between the (Q103) Adjustable Pedals Switch Rearward circuit and the (Z910) Ground circuit at the Adjustable Pedals switch connector. Is the resistance below 10K Ohms? Yes Repair the (Q103) Adjustable Pedals Switch Rearward circuit for a short to the (Z910) Ground circuit. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 6 .
6. CHECK FOR A SHORTED ADJUSTABLE PEDALS SWITCH Remove the Adjustable Pedals Switch in accordance with the Service Information. NOTE: Adjustable Pedals Switch (harness) connector shown in illustration. Mirror image for 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? 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) .

B1D62-POWER SEAT SWITCH STUCK

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

Continuously.

When the Memory Seat Module (MSM) detects the Driver Seat Switch engaged in an active position for more than 50 seconds.

Continuously.

When the Memory Seat Module (MSM) detects an open Driver Seat Switch MUX circuit.

Scheme 196

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Scheme 200

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Press the seat switch in all directions several times then wait one minute. Using a scan tool, read DTCs. Does the scan tool display DTC B1D63-POWER SEAT SWITCH OPEN? Yes Go To 2 . 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) .
2. CHECK THE (P309) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT RESISTANCE Turn the ignition off. Disconnect the Memory Seat Module C4 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance between the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit and the (P28) Driver Seat Switch MUX Return circuit at the Memory Seat Module C4 connector. Is the resistance 47.0 Ohms + or - 1.0? Yes Go To 3 . No Go To 5 .
3. CHECK THE (P311) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT RESISTANCE Measure the resistance between the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit and the (P28) Driver Seat Switch MUX Return circuit at the Memory Seat Module C4 connector. Is the resistance 47.0 Ohms + or - 1.0? 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 Go To 4 .
4. CHECK THE (P311) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT FOR AN OPEN Disconnect the Driver Seat Switch connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector. Is the resistance below 5.0 Ohms? 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 Repair the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (P309) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR AN OPEN Measure the resistance of the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector. Is the resistance below 5.0 Ohms? Yes Go To 6 . No Repair the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
6. CHECK THE (P28) DRIVER SEAT SWITCH MUX RETURN CIRCUIT FOR AN OPEN Measure the resistance of the (P28) Driver Seat Switch MUX Return circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector. Is the resistance below 5.0 Ohms? 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 Repair the (P28) Driver Seat Switch MUX Return circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D67-ADJUSTABLE PEDAL CONTROL CIRCUIT PERFORMANCE

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

Continuously.

The Adjustable Pedals switch is pressed three times in opposite directions (e.g. either, forward, rearward, forward, or rearward, forward, rearward) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect Adjustable Pedals Motor rotation in either direction.

Scheme 201

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Scheme 205

1. INSPECT THE ADJUSTABLE PEDALS ASSEMBLY FOR DAMAGE NOTE: If present, diagnose and repair Diagnostic Trouble Code (DTC) B1D56-Adjustable Pedal Sensor Circuit Low or B1D57-Adjustable Pedal Sensor Circuit High before proceeding. Turn the ignition off. Inspect the Adjustable Pedals assembly for damage. Is the assembly damaged? Yes Replace the Adjustable Pedals assembly in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. INSPECT FOR OBSTRUCTION IN PATH OF ADJUSTABLE PEDALS Inspect for anything that would prevent the Adjustable Pedals from moving to each end-stop. Is anything present that would prevent the Adjustable Pedals from moving to each end-stop? Yes Repair as necessary. Perform the APS 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 DTCs. Cycle the ignition from on to off. Turn the ignition on. NOTE: Do not adjust the pedals against an end-stop when performing the following. 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. Does the scan tool display DTC B1D67-ADJUSTABLE PEDAL CONTROL CIRCUIT PERFORMANCE? Yes Go To 4 . No The conditions that caused this code to set are not present at this time. Repeat Step 5, beginning in direction opposite of that previously selected. If DTC now is active, Go To 4 . Otherwise, perform the APS INTERMITTENT CONDITION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
4. CHECK (P205) ADJUSTABLE PEDALS MOTOR FORWARD AND (P206) ADJUSTABLE PEDALS MOTOR REARWARD CIRCUIT FUNCTION Turn the ignition off. Disconnect the Adjustable Pedals Motor harness connector. NOTE: Check connectors. Clean and repair as necessary. Connect a 12-volt test light between the (P205) Adjustable Pedals Motor Forward circuit and the (P206) Adjustable Pedals Motor Rearward circuit at the Adjustable Pedals Motor harness connector. Turn the ignition on. While monitoring the test light, operate the Adjustable Pedals switch in both directions. Does the test light illuminate with the Adjustable Pedals switch engaged? Yes Go To 5 . No Go To 8 .
5. CHECK ADJUSTABLE PEDALS MOTOR OPERATION Turn the ignition off. Reconnect the Adjustable Pedals Motor harness connector. Disconnect the MSM C1 connector. NOTE: Check connectors. Clean and repair as necessary. Check motor operation in both directions as follows: NOTE: Do not adjust the pedals against an end-stop when performing the following. To drive pedals forward: Connect one end of a fused jumper wire to battery voltage and the other end to the (P205) Adjustable Pedals Motor Forward circuit at the MSM C1 harness connector. Connect an ammeter between ground and the (P206) Adjustable Pedals Motor Rearward circuit at the MSM C1 harness connector. Disconnect before reaching the end-stop. To drive pedals rearward: Connect one end of a fused jumper wire to battery voltage and the other end to the (P206) Adjustable Pedals Motor Rearward circuit at the MSM C1 harness connector. Connect an ammeter between ground and the (P205) Adjustable Pedals Motor Forward circuit at the MSM C1 harness connector. Disconnect before reaching the end-stop. NOTE: The Adjustable Pedals Motor should be operational in both directions and the ammeter should read 0.9 to 1.5 amps. Does the motor operate as specified? Yes Go To 6 . No Check (P205) Adjustable Pedals Motor Forward circuit and (P206) Adjustable Pedals Motor Rearward circuit for high resistance. If circuits are okay, replace the Adjustable Pedals Motor in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
6. CHECK ADJUSTABLE PEDALS SENSOR OPERATION Reconnect the MSM C1 harness connector. Turn the ignition on. Using a scan tool, erase DTCs. Cycle the ignition from on to off. Connect the positive lead of a lab scope to the (G13) Adjustable Pedals Sensor Supply circuit and the negative lead to the (G493) Position Sensor Ground circuit the MSM C2 harness connector. Set the lab scope range to 20 volts and time to 20 ms divisions. Turn the ignition on. NOTE: Do not adjust the pedals against an end-stop when performing the following. Operate the Adjustable Pedals switch in one direction. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the pedals. If the module fails to detect sensor operation it will stop pedal operation in approximately two seconds. Does the sensor operate as specified? Yes Leave Scope Connected. Go To 7 . No Replace the Adjustable Pedals Sensor in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
7. CHECK ADJUSTABLE PEDALS SENSOR OPERATION IN OPPOSITE DIRECTION Using a scan tool, erase DTCs if present. Cycle the ignition from on to off. Turn the ignition on. NOTE: Do not adjust the pedals against an end-stop when performing the following. Operate the Adjustable Pedals switch in the direction opposite of that previously selected. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the pedals. If the module fails to detect sensor operation it will stop pedal operation in approximately two seconds. Does the sensor operate as specified? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Adjustable Pedals Sensor in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
8. CHECK THE (P205) ADJUSTABLE PEDALS MOTOR FORWARD CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the MSM C1 harness connector. Measure the resistance of the (P205) Adjustable Pedals Motor Forward circuit between the MSM C1 harness connector and the Adjustable Pedals Motor connector. Is the resistance below 5.0 Ohms? Yes Go To 9 . No Repair the (P205) Adjustable Pedals Motor Forward circuit for an open. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
9. CHECK THE (P206) ADJUSTABLE PEDALS MOTOR REARWARD CIRCUIT FOR AN OPEN Measure the resistance of the (P206) Adjustable Pedals Motor Rearward circuit between the MSM C1 connector and the Adjustable Pedals Motor connector. Is the resistance below 5.0 Ohms? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Repair the (P206) Adjustable Pedals Motor Rearward circuit for an open. Perform the APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 206

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

Continuously.

If Voltage on the (G401) Driver Seat Horizontal Position Sense circuit is not within a specified range.

Scheme 207

Scheme 208

Scheme 209

1. CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition from on to off three times. Turn the ignition on and wait 30 seconds. Using a scan tool, read DTCs. Is DTC B1D6D-SEAT HORIZONTAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . No Go To 2 .
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT Move the seat switch in the horizontal adjust position three times. Using a scan tool, read DTCs. Is DTC B1D6D-SEAT HORIZONTAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . 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) .
3. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the MSM C3 connector. Disconnect the Driver Horizontal Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G401) Driver Seat Horizontal Position Sense circuit between ground and the Driver Horizontal Seat Adjuster Motor connector. Is the resistance below 10K Ohms? Yes Repair the (G401) Driver Seat Horizontal Position Sense circuit for a short to ground. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR A SHORT TO (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT, (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT, AND (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT Measure the resistance between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit at the Driver Horizontal Seat Adjuster Motor connector. Measure the resistance between the (G401) Driver Seat Horizontal Position Sense circuit and the (P115) Driver Seat Horizontal Forward Driver circuit at the Driver Horizontal Seat Adjuster Motor connector. Measure the resistance between the (G401) Driver Seat Horizontal Position Sense circuit and the (P117) Driver Seat Horizontal Rearward Driver circuit at the Driver Horizontal Seat Adjuster Motor connector. Is the resistance below 10K Ohms for any measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to the (G401) Driver Seat Horizontal Position Sense circuit. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT AND THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FUNCTION Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit at the Driver Horizontal Seat Adjuster Motor connector. Move the seat switch in the horizontal adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Seat Track Horizontal Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No 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) .

B1D6E-SEAT HORIZONTAL POSITION SENSOR CIRCUIT HIGH

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

When the seat motor is activated (sensor supply Voltage is switched on whenever motor is activated).

If the sensor Voltage is not within a specified range and the seat switch is moved in the same direction three consecutive times.

Scheme 210

Scheme 211

Scheme 212

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Move the seat switch in the horizontal adjust position three times. Using a scan tool, read DTCs. Does the scan tool display DTC B1D6E-SEAT HORIZONTAL POSITION SENSOR CIRCUIT HIGH? Yes Go To 2 . 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) .
2. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Driver Horizontal Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Turn the ignition on. Measure the Voltage of the (G401) Driver Seat Horizontal Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and ground. Is there any Voltage present? Yes Repair the (G401) Driver Seat Horizontal Position Sense circuit for a short to Voltage. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT AND THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light connect between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit at the Driver Horizontal Seat Adjuster Motor connector. Move the seat switch in the horizontal adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Seat Track Horizontal Motor Assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G401) Driver Seat Horizontal Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (G401) Driver Seat Horizontal Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G491) Driver Seat Horizontal Sensor Ground circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G491) Driver Seat Horizontal Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 213

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

Continuously.

If Voltage on the (G404) Driver Seat Front Vertical Position Sense circuit is not within a specified range.

Scheme 214

Scheme 215

Scheme 216

1. CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition from on to off three times. Turn the ignition on and wait 30 seconds. Using a scan tool, read DTCs. Is DTC B1D71-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . No Go To 2 .
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT Move the seat switch in the front vertical adjust position three times. Using a scan tool, read DTCs. Is DTC B1D71-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . 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) .
3. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the MSM C3 connector. Disconnect the Front Driver Vertical Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G404) Driver Seat Front Vertical Position Sense circuit between ground and the Front Driver Vertical Seat Adjuster Motor connector. Is the resistance below 10K Ohms? Yes Repair the (G404) Driver Seat Front Vertical Position Sense circuit for a short to ground. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT, (P119) DRIVER SEAT FRONT VERTICAL UP DRIVER CIRCUIT, AND (P121) DRIVER SEAT FRONT VERTICAL DOWN DRIVER CIRCUIT Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Front Driver Vertical Seat Adjuster Motor connector. Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (P119) Driver Seat Front Vertical Up Driver circuit at the Front Driver Vertical Seat Adjuster Motor connector. Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (P121) Driver Seat Front Vertical Down Driver circuit at the Front Driver Vertical Seat Adjuster Motor connector. Is the resistance below 10K Ohms for any measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to the (G404) Driver Seat Front Vertical Position Sense circuit. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT AND THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FUNCTION Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Front Driver Vertical Seat Adjuster Motor connector. Move the seat switch in the front vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Front Driver Vertical Seat Adjuster Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No 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) .

B1D72-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT HIGH

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

When the seat motor is activated (sensor supply Voltage is switched on whenever motor is activated).

If the sensor Voltage is not within a specified range and the seat switch is moved in the same direction three consecutive times.

Scheme 217

Scheme 218

Scheme 219

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Move the seat switch in the front vertical adjust position three times. Using a scan tool, read DTCs. Does the scan tool display DTC B1D72-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT HIGH? Yes Go To 2 . 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) .
2. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Front Driver Vertical Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Turn the ignition on. Measure the Voltage of the (G404) Driver Seat Front Vertical Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and ground. Is there any Voltage present? Yes Repair the (G404) Driver Seat Front Vertical Position Sense circuit for a short to Voltage. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT AND THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Driver Front Vertical Seat Adjuster Motor connector. Move the seat switch in the front vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Front Driver Vertical Seat Adjuster Motor Assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G404) Driver Seat Front Vertical Position Sense circuit between the Front Driver Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (G404) Driver Seat Front Vertical Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G494) Driver Seat Front Vertical Sensor Ground circuit between the Driver Front Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G494) Driver Seat Front Vertical Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 220

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

Continuously.

If Voltage on the (G402) Driver Seat Rear Vertical Position Sense circuit is not within a specified range.

Scheme 221

Scheme 222

Scheme 223

1. CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition from on to off three times. Turn the ignition on and wait 30 seconds. Using a scan tool, read DTCs. Is DTC B1D75-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . No Go To 2 .
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT Move the seat switch in the rear vertical adjust position three times. Using a scan tool, read DTCs. Is DTC B1D75-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . 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) .
3. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the MSM C3 connector. Disconnect the Rear Driver Vertical Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G402) Driver Seat Rear Vertical Position Sense circuit between ground and the Rear Driver Vertical Seat Adjuster Motor connector. Is the resistance below 10K Ohms? Yes Repair the (G402) Driver Seat Rear Vertical Position Sense circuit for a short to ground. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT, (P111) DRIVER SEAT REAR VERTICAL UP DRIVER CIRCUIT, AND (P113) DRIVER SEAT REAR VERTICAL DOWN DRIVER CIRCUIT Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Rear Driver Vertical Seat Adjuster Motor connector. Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (P111) Driver Seat Rear Vertical Up Driver circuit at the Rear Driver Vertical Seat Adjuster Motor connector. Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (P113) Driver Seat Rear Vertical Down Driver circuit at the Rear Driver Vertical Seat Adjuster Motor connector. Is the resistance below 10K Ohms for any measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to the (G402) Driver Seat Rear Vertical Position Sense circuit. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT AND THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FUNCTION Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Rear Driver Vertical Seat Adjuster Motor connector. Move the seat switch in the rear vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Rear Driver Vertical Seat Adjuster Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No 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) .

B1D76-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT HIGH

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

When the seat motor is activated (sensor supply voltage is switched on whenever motor is activated).

If the sensor Voltage is not within a specified range and the seat switch is moved in the same direction three consecutive times.

Scheme 224

Scheme 225

Scheme 226

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Move the seat switch in the rear vertical adjust position three times. Using a scan tool, read DTCs. Does the scan tool display DTC B1D76 - SEAT REAR VERTICAL POSITION SENSOR CIRCUIT HIGH? Yes Go To 2 . 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) .
2. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Rear Driver Vertical Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Turn the ignition on. Measure the Voltage of the (G402) Driver Seat Rear Vertical Position Sense circuit between the Rear Driver Vertical Seat Adjuster Motor connector and ground. Is there any Voltage present? Yes Repair the (G402) Driver Seat Rear Vertical Position Sense circuit for a short to Voltage. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT AND THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Driver Rear Vertical Seat Adjuster Motor connector. Move the seat switch in the rear vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Rear Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G402) Driver Seat Rear Vertical Position Sense circuit between the Rear Driver Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 ohms? Yes Go To 5 . No Repair the (G402) Driver Seat Rear Vertical Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G492) Driver Seat Rear Vertical Sensor Ground circuit between the Driver Rear Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 ohms? 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 Repair the (G492) Driver Seat Rear Vertical Sensor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

Scheme 227

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

Continuously.

If Voltage on the (G403) Driver Seat Recliner Position Sense circuit is not within a specified range.

Scheme 228

Scheme 229

Scheme 230

1. CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Cycle the ignition from on to off three times. Turn the ignition on and wait 30 seconds. Using a scan tool, read DTCs. Is DTC B1D79-SEAT RECLINER POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . No Go To 2 .
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT Move the seat switch in the recliner adjust position three times. Using a scan tool, read DTCs. Is DTC B1D79-SEAT RECLINER POSITION SENSOR CIRCUIT LOW active? Yes Go To 3 . 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) .
3. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the MSM C2 connector. Disconnect the Driver Recliner Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G403) Driver Seat Recliner Position Sense circuit between ground and the Driver Recliner Seat Adjuster Motor connector. Is the resistance below 10K Ohms? Yes Repair the (G403) Driver Seat Recliner Position Sense circuit for a short to ground. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR A SHORT TO THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT, THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT, AND THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT Measure the resistance between the (G403) Driver Seat Recliner Position Sense circuit and the (G493) Driver Seat Recliner Position Sensor Ground circuit at the Driver Recliner Seat Adjuster Motor connector. Measure the resistance between the (G403) Driver Seat Recliner Position Sense circuit and the (P141) Driver Seat Recliner Up Driver circuit at the Driver Recliner Seat Adjuster Motor connector. Measure the resistance between the (G403) Driver Seat Recliner Position Sense circuit and the (P143) Driver Seat Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor connector. Is the resistance below 10K Ohms for any measurement? Yes Repair all circuits with a resistance below 10K Ohms for a short to the (G403) Driver Seat Recliner Position Sense circuit. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 5 .
5. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT AND THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FUNCTION Reconnect the MSM C2 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G403) Driver Seat Recliner Position Sense circuit and the (G493) Driver Seat Recliner Position Sensor Ground circuit at the Driver Recliner Seat Adjuster Motor connector. Move the seat switch in the recliner adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Driver Recliner Seat Adjuster Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No 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) .

B1D7A-SEAT RECLINER POSITION SENSOR CIRCUIT HIGH

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

When the seat motor is activated (sensor supply Voltage is switched on whenever motor is activated).

If the sensor Voltage is not within a specified range and the seat switch is moved in the same direction three consecutive times.

Scheme 231

Scheme 232

Scheme 233

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Move the seat switch in the recliner adjust position three times. Using a scan tool, read DTCs. Does the scan tool display DTC B1D7A-SEAT RECLINER POSITION SENSOR CIRCUIT HIGH? Yes Go To 2 . 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) .
2. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Driver Recliner Seat Adjuster Motor connector. Disconnect the MSM C2 connector. NOTE: Check connectors. Clean and repair as necessary. Turn the ignition on. Measure the Voltage of the (G403) Driver Seat Recliner Position Sense circuit between the Driver Recliner Seat Adjuster Motor connector and ground. Is there any Voltage present? Yes Repair the (G403) Driver Seat Recliner Position Sense circuit for a short to Voltage. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 3 .
3. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT AND THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Reconnect the MSM C3 connector. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G403) Driver Seat Recliner Position Sense circuit and the (G493) Driver Seat Recliner Position Sensor Ground circuit at the Driver Recliner Seat Adjuster Motor connector. Move the seat switch in the recliner adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Replace the Driver Recliner Seat Adjuster Motor Assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 4 .
4. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C2 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G403) Driver Seat Recliner Position Sense circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (G403) Driver Seat Recliner Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
5. CHECK THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G493) Driver Seat Recliner Position Sensor Ground circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G493) Driver Seat Recliner Position Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D7B-SEAT HORIZONTAL MOTOR CONTROL CIRCUIT PERFORMANCE

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

Whenever the seat motor is activated.

The seat switch is pressed three times in opposite directions (e.g. either, horizontal forward, horizontal rearward, and horizontal forward, or horizontal rearward, horizontal forward, and horizontal rearward) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect seat motor rotation in either direction.

Scheme 234

Scheme 235

Scheme 236

Scheme 237

Scheme 238

1. INSPECT SEAT TRACK, MOTOR, AND HARNESS Verify seat harness is routed correctly. Inspect seat track and motor for damage. Inspect for anything that would prevent the seat from moving to each end-stop. Is anything present that would prevent the seat from moving to each end-stop? Yes Repair as necessary. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. CHECK FOR SEAT POSITION SENSOR DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display any seat position sensor DTCs? Yes Diagnose and repair all seat position sensor DTCs. Refer to «Diagnosis and Testing»(ref-457886-S15824190502012030200000) . No Go To 3 .
3. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Move the seat switch in one horizontal adjustment direction for at least one second then release the switch. Repeat three times consecutively, but move the switch in the opposite direction each time. Using a scan tool, read DTCs. Does the scan tool display DTC B1D7B-SEAT HORIZONTAL MOTOR CONTROL CIRCUIT PERFORMANCE? Yes Go To 4 . 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. 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) .
4. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT AND THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Disconnect the Driver Horizontal Seat Adjuster Motor connector. NOTE: Check connectors - Clean and repair as necessary. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light connect between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit at the Driver Horizontal Seat Adjuster Motor connector. Move the seat switch in the horizontal adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Go To 5 . No Go To 9 .
5. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT AND THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FUNCTION Connect a 12-Volt test light between the (P115) Driver Seat Horizontal Forward Driver circuit and the (P117) Driver Seat Horizontal Rearward Driver circuit at the Driver Horizontal Seat Adjuster Motor connector. Move the seat switch in the horizontal adjust position. Does the test light illuminate with the seat switch engaged? Yes Go To 6 . No Go To 11 .
6. CHECK THE DRIVER HORIZONTAL SEAT ADJUSTER MOTOR OPERATION Reconnect the Driver Horizontal Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Check motor operation in both directions as follows: NOTE: Do not adjust the seat against an end-stop when performing the following. To drive seat forward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P115) Driver Seat Horizontal Forward Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P117) Driver Seat Horizontal Rearward Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. To drive seat rearward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P117) Driver Seat Horizontal Rearward Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P115) Driver Seat Horizontal Forward Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. NOTE: The seat motor should be operational in both directions and the ammeter should read approximately 4.3 amps in the forward direction and 3.5 amps in the rearward direction. Does the motor operate as specified? Yes Go To 7 . No Check (P115) Driver Seat Horizontal Forward Driver circuit and (P117) Driver Seat Horizontal Rearward Driver circuit for high resistance. If circuits are okay, replace the Seat Track Horizontal Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
7. CHECK THE DRIVER HORIZONTAL SEAT ADJUSTER MOTOR SENSOR OPERATION Reconnect the MSM C3 connector. Turn the ignition on. Using a scan tool, erase DTCs. Connect the positive lead of a lab scope to the (G401) Driver Seat Horizontal Position Sense circuit and the negative lead to the (G491) Driver Seat Horizontal Sensor Ground circuit at the MSM C3 connector. Set the lab scope range to 20 Volts and time to 20 ms divisions. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in one horizontal adjust position. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Leave Scope Connected. Go To 8 . No Replace the Seat Track Horizontal Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
8. CHECK THE DRIVER HORIZONTAL SEAT ADJUSTER MOTOR SENSOR OPERATION IN OPPOSITE DIRECTION Using a scan tool, erase DTCs if present. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in the direction opposite of that previously selected. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Seat Track Horizontal Motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
9. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G401) Driver Seat Horizontal Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 10 . No Repair the (G401) Driver Seat Horizontal Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
10. CHECK THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G491) Driver Seat Horizontal Sensor Ground circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G491) Driver Seat Horizontal Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
11. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (P115) Driver Seat Horizontal Forward Driver circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 12 . No Repair the (P115) Driver Seat Horizontal Forward Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
12. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (P117) Driver Seat Horizontal Rearward Driver circuit between the Driver Horizontal Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (P117) Driver Seat Horizontal Rearward Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D7F-SEAT FRONT VERTICAL MOTOR CONTROL CIRCUIT PERFORMANCE

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

Whenever the seat motor is activated.

The seat switch is pressed three times in opposite directions (e.g. either, front vertical up, front vertical down, and front vertical up, or front vertical down, front vertical up, and front vertical down) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect seat motor rotation in either direction.

Scheme 239

Scheme 240

Scheme 241

Scheme 242

Scheme 243

1. INSPECT SEAT TRACK, MOTOR, AND HARNESS Verify seat harness is routed correctly. Inspect seat track and motor for damage. Inspect for anything that would prevent the seat from moving to each end-stop. Is anything present that would prevent the seat from moving to each end-stop? Yes Repair as necessary. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. CHECK FOR SEAT POSITION SENSOR DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display any seat position sensor DTCs? Yes Diagnose and repair all seat position sensor DTCs. Refer to «Diagnosis and Testing»(ref-457886-S15824190502012030200000) . No Go To 3 .
3. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Move the seat switch in one front vertical adjustment direction for at least one second then release the switch. Repeat three times consecutively, but move the switch in the opposite direction each time. Using a scan tool, read DTCs. Does the scan tool display DTC B1D7F-SEAT FRONT VERTICAL MOTOR CONTROL CIRCUIT PERFORMANCE? Yes Go To 4 . 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. 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) .
4. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT AND THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Disconnect the Front Driver Vertical Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Driver Front Vertical Seat Adjuster Motor connector. Move the seat switch in the front vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Go To 5 . No Go To 9 .
5. CHECK THE (P119) DRIVER SEAT FRONT VERTICAL UP DRIVER CIRCUIT THE (P121) DRIVER SEAT FRONT VERTICAL DOWN DRIVER CIRCUIT FUNCTION Connect a 12-Volt test light between the (P119) Driver Seat Front Vertical Up Driver circuit and the (P121) Driver Seat Front Vertical Down Driver circuit at the Front Driver Vertical Seat Adjuster Motor connector. Move the seat switch in the front vertical adjust position. Does the test light illuminate with the seat switch engaged? Yes Go To 6 . No Go To 11 .
6. CHECK THE FRONT DRIVER VERTICAL SEAT ADJUSTER MOTOR OPERATION Reconnect the Front Driver Vertical Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Check motor operation in both directions as follows: NOTE: Do not adjust the seat against an end-stop when performing the following. To drive seat upward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P119) Driver Seat Front Vertical Up Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P121) Driver Seat Front Vertical Down Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. To drive seat downward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P121) Driver Seat Front Vertical Down Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P119) Driver Seat Front Vertical Up Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. NOTE: The seat motor should be operational in both directions and the ammeter should read approximately 2.5 amps in the upward direction and 3.5 amps in the downward direction. Does the motor operate as specified? Yes Go To 7 . No Check (P119) Driver Seat Front Vertical Up Driver circuit and (P121) Driver Seat Front Vertical Down Driver circuit for high resistance. If circuits are okay, replace the Front Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
7. CHECK THE FRONT DRIVER VERTICAL SEAT ADJUSTER MOTOR SENSOR OPERATION Reconnect the MSM C3 connector. Turn the ignition on. Using a scan tool, erase DTCs. Connect the positive lead of a lab scope to the (G404) Driver Seat Front Vertical Position Sense circuit and the negative lead to the (G494) Driver Seat Front Vertical Sensor Ground circuit at the MSM C3 connector. Set the lab scope range to 20 Volts and time to 20 ms divisions. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in one front vertical adjust position. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Leave Scope Connected. Go To 8 . No Replace the Front Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
8. CHECK THE FRONT DRIVER VERTICAL SEAT ADJUSTER MOTOR SENSOR OPERATION IN OPPOSITE DIRECTION Using a scan tool, erase DTCs if present. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in the direction opposite of that previously selected. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Front Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
9. CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G404) Driver Seat Front Vertical Position Sense circuit between the Front Driver Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 10 . No Repair the (G404) Driver Seat Front Vertical Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
10. CHECK THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G494) Driver Seat Front Vertical Sensor Ground circuit between the Driver Front Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G494) Driver Seat Front Vertical Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
11. CHECK THE (P119) DRIVER SEAT FRONT VERTICAL UP DRIVER CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (P119) Driver Seat Front Vertical Up Driver circuit between the Driver Front Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 12 . No Repair the (P119) Driver Seat Front Vertical Up Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
12. CHECK THE (P121) DRIVER SEAT FRONT VERTICAL DOWN DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (P121) Driver Seat Front Vertical Down Driver circuit between the Driver Front Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (P121) Driver Seat Front Vertical Down Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D83-SEAT REAR VERTICAL MOTOR CONTROL CIRCUIT PERFORMANCE

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

Whenever the seat motor is activated.

The seat switch is pressed three times in opposite directions (e.g. either, rear vertical up, rear vertical down, and rear vertical up, or rear vertical down, rear vertical up, and rear vertical down) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect seat motor rotation in either direction.

Scheme 244

Scheme 245

Scheme 246

Scheme 247

Scheme 248

1. INSPECT SEAT TRACK, MOTOR, AND HARNESS Verify seat harness is routed correctly. Inspect seat track and motor for damage. Inspect for anything that would prevent the seat from moving to each end-stop. Is anything present that would prevent the seat from moving to each end-stop? Yes Repair as necessary. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. CHECK FOR SEAT POSITION SENSOR DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display any seat position sensor DTCs? Yes Diagnose and repair all seat position sensor DTCs. Refer to «Diagnosis and Testing»(ref-457886-S15824190502012030200000) . No Go To 3 .
3. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Move the seat switch in one rear vertical adjustment direction for at least one second then release the switch. Repeat three times consecutively, but move the switch in the opposite direction each time. Using a scan tool, read DTCs. Does the scan tool display DTC B1D83-SEAT REAR VERTICAL MOTOR CONTROL CIRCUIT PERFORMANCE? Yes Go To 4 . 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. 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) .
4. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT AND THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Disconnect the Rear Driver Vertical Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Driver Rear Vertical Seat Adjuster Motor connector. Move the seat switch in the rear vertical adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Go To 5 . No Go To 9 .
5. CHECK THE (P111) DRIVER SEAT REAR VERTICAL UP DRIVER CIRCUIT AND THE (P113) DRIVER SEAT REAR VERTICAL DOWN DRIVER CIRCUIT FUNCTION Connect a 12-Volt test light between the (P111) Driver Seat Rear Vertical Up Driver circuit and the (P113) Driver Seat Rear Vertical Down Driver circuit at the Rear Driver Vertical Seat Adjuster Motor connector. Move the seat switch in the rear vertical adjust position. Does the test light illuminate with the seat switch engaged? Yes Go To 6 . No Go To 11 .
6. CHECK THE REAR DRIVER VERTICAL SEAT ADJUSTER MOTOR OPERATION Reconnect the Rear Driver Vertical Seat Adjuster Motor connector. Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Check motor operation in both directions as follows: NOTE: Do not adjust the seat against an end-stop when performing the following. To drive seat upward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P111) Driver Seat Rear Vertical Up Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P113) Driver Seat Rear Vertical Down Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. To drive seat downward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P113) Driver Seat Rear Vertical Down Driver circuit at the MSM C3 connector. Connect an ammeter between ground and the (P111) Driver Seat Rear Vertical Up Driver circuit at the MSM C3 connector. Disconnect before reaching the end-stop. NOTE: The seat motor should be operational in both directions and the ammeter should read approximately 2.6 amps in the upward direction and 1.4 amps in the downward direction. Does the motor operate as specified? Yes Go To 7 . No Check (P111) Driver Seat Rear Vertical Up Driver circuit and (P113) Driver Seat Rear Vertical Down Driver circuit for high resistance. If circuits are okay, replace the Rear Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
7. CHECK THE REAR DRIVER VERTICAL SEAT ADJUSTER MOTOR SENSOR OPERATION Reconnect the MSM C3 connector. Turn the ignition on. Using a scan tool, erase DTCs. Connect the positive lead of a lab scope to the (G402) Driver Seat Rear Vertical Position Sense circuit and the negative lead to the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the MSM C3 connector. Set the lab scope range to 20 Volts and time to 20 ms divisions. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in one rear vertical adjust position. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Leave Scope Connected. Go To 8 . No Replace the Rear Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
8. CHECK THE REAR DRIVER VERTICAL SEAT ADJUSTER MOTOR SENSOR OPERATION IN OPPOSITE DIRECTION Using a scan tool, erase DTCs if present. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in the direction opposite of that previously selected. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Rear Driver Vertical Seat Adjuster motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
9. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G402) Driver Seat Rear Vertical Position Sense circuit between the Rear Driver Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 10 . No Repair the (G402) Driver Seat Rear Vertical Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
10. CHECK THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G492) Driver Seat Rear Vertical Sensor Ground circuit between the Driver Rear Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G492) Driver Seat Rear Vertical Sensor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
11. CHECK THE (P111) DRIVER SEAT REAR VERTICAL UP DRIVER CIRCUIT FOR AN OPEN Disconnect the MSM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (P111) Driver Seat Rear Vertical Up Driver circuit between the Driver Rear Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? Yes Go To 12 . No Repair the (P111) Driver Seat Rear Vertical Up Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
12. CHECK THE (P113) DRIVER SEAT REAR VERTICAL DOWN DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (P113) Driver Seat Rear Vertical Down Driver circuit between the Driver Rear Vertical Seat Adjuster Motor connector and the MSM C3 connector. Is the resistance below 5.0 Ohms? 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 Repair the (P113) Driver Seat Rear Vertical Down Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D87-SEAT BACKREST MOTOR CONTROL CIRCUIT PERFORMANCE

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

Whenever the seat motor is activated.

The seat switch is pressed three times in opposite directions (e.g. either, recliner forward, recliner rearward, and recliner forward, or recliner rearward, recliner forward, and recliner rearward) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect seat motor rotation in either direction.

Scheme 249

Scheme 250

Scheme 251

Scheme 252

Scheme 253

1. INSPECT FOR OBSTRUCTION IN SEAT PATH Verify seat harness is routed correctly. Inspect seat for damage. Inspect for anything that would prevent the seat from moving to each end-stop. Is anything present that would prevent the seat from moving to each end-stop? Yes Repair as necessary. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Go To 2 .
2. CHECK FOR SEAT POSITION SENSOR DIAGNOSTIC TROUBLE CODES (DTCs) Turn the ignition on. Using a scan tool, read DTCs. Does the scan tool display any seat position sensor DTCs? Yes Diagnose and repair all seat position sensor DTCs. Refer to «Diagnosis and Testing»(ref-457886-S15824190502012030200000) . No Go To 3 .
3. TEST FOR INTERMITTENT CONDITION Using a scan tool, record and erase DTCs. Move the seat switch in one recliner adjustment direction for at least one second then release the switch. Repeat three times consecutively, but move the switch in the opposite direction each time. Using a scan tool, read DTCs. Does the scan tool display DTC B1D87-SEAT BACKREST MOTOR CONTROL CIRCUIT PERFORMANCE? Yes Go To 4 . 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. 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) .
4. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT AND THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FUNCTION Turn the ignition off. Disconnect the Driver Recliner Seat Adjuster Motor connector. NOTE: Check connectors. Clean and repair as necessary. Disconnect the scan tool. Turn off all vehicle interior and exterior lighting. Mark sure all doors are closed then wait 10 seconds. Connect a 12-Volt test light between the (G403) Driver Seat Recliner Position Sense circuit and the (G493) Driver Seat Recliner Position Sensor Ground circuit at the Driver Recliner Seat Adjuster Motor connector. Move the seat switch in the recliner adjust position then release the switch. Does the test light illuminate for approximately five seconds then turn off? Yes Go To 5 . No Go To 9 .
5. CHECK THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT AND THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT FUNCTION Connect a 12-Volt test light between the (P141) Driver Seat Recliner Up Driver circuit and the (P143) Driver Seat Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor connector. Move the seat switch in the recliner adjust position. Does the test light illuminate with the seat switch engaged? Yes Go To 6 . No Go To 11 .
6. CHECK THE DRIVER SEAT RECLINER ADJUSTER MOTOR OPERATION Turn the ignition off. Reconnect the Driver Recliner Seat Adjuster Motor connector. Disconnect the MSM C2 connector. NOTE: Check connectors. Clean and repair as necessary. Check motor operation in both directions as follows: NOTE: Do not adjust the seat against an end-stop when performing the following. To drive seat back forward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P141) Driver Seat Recliner Up Driver circuit at the MSM C2 connector. Connect an ammeter between ground and the (P143) Driver Seat Recliner Down Driver circuit at the MSM C2 connector. Disconnect before reaching the end-stop. To drive seat back rearward: Connect one end of a fused jumper wire to battery Voltage and the other end to the (P143) Driver Seat Recliner Down Driver circuit at the MSM C2 connector. Connect an ammeter between ground and the (P141) Driver Seat Recliner Up Driver circuit at the MSM C2 connector. Disconnect before reaching the end-stop. NOTE: The seat motor should be operational in both directions and the ammeter should read approximately 2.0 amps reclining backward and 2.5 amps reclining forward. Does the motor operate as specified? Yes Go To 7 . No Check (P141) Driver Seat Recliner Up Driver circuit and (P143) Driver Seat Recliner Down Driver circuit for high resistance. If circuits are okay, replace the Recliner motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
7. CHECK THE DRIVER SEAT RECLINER ADJUSTER MOTOR SENSOR OPERATION Reconnect the MSM C2 connector. Turn the ignition on. Using a scan tool, erase DTCs. Connect the positive lead of a lab scope to the (G403) Driver Seat Recliner Position Sense circuit and the negative lead to the (G493) Driver Seat Recliner Position Sensor Ground circuit at the MSM C2 connector. Set the lab scope range to 20 Volts and time to 20 ms divisions. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in one recliner adjust position. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Leave Scope Connected. Go To 8 . No Replace the Recliner motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
8. CHECK THE DRIVER SEAT RECLINER ADJUSTER MOTOR SENSOR OPERATION IN OPPOSITE DIRECTION Using a scan tool, erase DTCs if present. NOTE: Do not adjust the seat against an end-stop when performing the following. Move the seat switch in the direction opposite of that previously selected. NOTE: If the sensor is functioning normally the scope will display a continuously cycling square wave when operating the seat. If the module fails to detect sensor operation it will stop seat operation in approximately two seconds. Does the sensor operate as specified? Yes Replace the Memory Seat Module (MSM) in accordance with the Service Information. Perform APS VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) . No Replace the Recliner motor assembly in accordance with the Service Information. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
9. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR AN OPEN Disconnect the MSM C2 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (G403) Driver Seat Recliner Position Sense circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? Yes Go To 10 . No Repair the (G403) Driver Seat Recliner Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
10. CHECK THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (G493) Driver Seat Recliner Position Sensor Ground circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? 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 Repair the (G493) Driver Seat Recliner Position Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
11. CHECK THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT FOR AN OPEN Disconnect the MSM C2 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (P141) Driver Seat Recliner Up Driver circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? Yes Go To 12 . No Repair the (P141) Driver Seat Recliner Up Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .
12. CHECK THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (P143) Driver Seat Recliner Down Driver circuit between the Driver Recliner Seat Adjuster Motor connector and the MSM C2 connector. Is the resistance below 5.0 Ohms? 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 Repair the (P143) Driver Seat Recliner Down Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B1D9B-SEAT HORIZONTAL FRONT STOP NOT LEARNED

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

Whenever the seat motor is activated.

If the seat is standardized and then it becomes de-standardized. The seat is standardized when the module learns the seat cushion horizontal front hard stop position. The seat is de-standardized if the seat cushion motor is 5% past the expected hard stop position or if a seat cushion hall sensor failure occurs. The seat must be standardized to perform an Easy Exit/Entry function.

Whenever the Bus is awake or during seat motor operation.

This code sets if the Memory Seat Module (MSM) detects Voltage under 9.5-volts on the (A907) Fused B(+) circuit.

Scheme 254

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 procedures . 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 B210D-BATTERY VOLTAGE LOW 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. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals. 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 harness 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 low Voltage condition at the Memory Seat Module (MSM). Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to «Standard Procedure»(ref-457886-S23561635112012030200000) .

B210E-BATTERY VOLTAGE HIGH

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

Whenever the Bus is awake or during seat operation.

This code will set if the Memory Seat Module (MSM) detects Voltage over 16.5-volts on the (A907) Fused B(+) circuit.

B221C-MEMORY SEAT MODULE INTERNAL

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

Ignition on.

If the Memory Seat Module (MSM) internal self-test fails.

With the ignition on.

The Memory Seat Module (MSM) detects that the (D265) CAN Interior Bus (125K) (+) circuit or (D264) CAN Interior Bus (125K) (-) circuit is shorted.

With the ignition on.

The Memory Seat Module (MSM) detects that the (D265) CAN Interior Bus (125K) (+) circuit is shorted.

With the ignition on.

The Memory Seat Module (MSM) detects that the (D264) CAN Interior Bus (125K) (-) circuit is shorted.

With the ignition on.

Battery Voltage between 10 and 16 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

With the ignition on.

Battery Voltage between 10 and 16 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Cluster (CCN) for approximately two to five seconds.

With the ignition on.

Battery Voltage between 10 and 16 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Door Module Front Left (DMFL) for approximately two to five seconds.

With the ignition on.

Battery Voltage between 10 and 16 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Door Module Front Right (DMFR) for approximately two to five seconds.