Canceling the DTC Indication
- Turn the ignition switch to LOCK (0).
- Press the SET button, or position button 1, or position button 2.
- Press one of the seat adjustment switches.
Erasing the DTC from Memory
Turn the ignition switch to LOCK (0). Raise the front and rear of the driver's seat to the highest position. Disconnect the gray driver's seat wire harness connector C701 (28P) from the SRS wire harness. Wait one minute and then plug them back in.
System Input Test and Function Test
- Connect the HDS to the data link connector (DLC).
- Turn the ignition switch to ON (II).
- From the BODY ELECTRICAL SYSTEM SELECT menu, select POWER SEAT/POWER MIRROR, then DTCs. If DTCs are found, troubleshoot the DTCs using B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-513878-S27009606942012111600000) ). If no DTCs are found, go to step 4.
- Exit the DTC mode and select DATA LIST from the POWER SEAT/POWER MIRROR TEST MODE MENU.
- Test each input and monitor each output under the condition shown below. If the data list indication is correct, continue to the next switch. If all switches are OK, go to step 6. If the data list indication is not correct, perform the appropriate test at the control unit and terminal indicated in the table. Voltage drop tests should be done with the ignition switch to ON (II) and all connectors connected and the meter negative test lead attached to a good body ground. Continuity tests should be done with the ignition switch to LOCK (0) and indicated terminals disconnected. Data List Input/Command Condition: Data List Indication Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Slide Switch Forward Slide switch forward: ON Switch released: OFF Power seat control unit/A7 (BLU), A1 (BRN) Slide switch released: more than 5V Slide switch forward: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Slide Switch Backward Slide switch backward: ON Switch released: OFF Power seat control unit/A27 (ORN/BLU), A1 (BRN) Slide switch released: more than 5V Slide switch rearward: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Recline Switch Forward Recline switch forward: ON Switch released: OFF Power seat control unit/A6 (WHT/YEL), A1 (BRN) Recline switch released: more than 5 V Recline switch forward: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Recline Switch Backward Recline switch backward: ON Switch open: OFF Power seat control unit/A25 (ORN/GRN), A1(BRN) Recline switch released: more than 5 V Recline switch rearward: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Front Up-Down Switch Up Front up-down switch up: ON Switch released: OFF Power seat control unit/A5 (GRN/BLU), A1 (BRN) Front up-down switch released: more than 5 V Front up-down switch up: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Front Up-Down Switch Down Front up-down switch down: ON Switch released: OFF Power seat control unit/A4 (RED/BLK), A1 (BRN) Front up-down switch released: more than 5 V Front up-down switch down: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Rear Up-Down Switch Up Rear up-down switch up: ON Switch released: OFF Power seat control unit/A23 (GRN/ORN), A1 (BRN) Rear up-down switch released: more than 5 V Rear up-down switch up: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Rear Up-Down Switch Down Rear up-down switch down: ON Switch released: OFF Power seat control unit/A3 (BRN/BLK), A1 (BRN) Rear up-down switch released: more than 5 V Rear up-down switch down: 0 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-513910-S06905236312012111600000) ) An open or high resistance in the wire A short to ground in the wire Faulty control unit Transmission Range Switch Transmission in P: ON Transmission out of P: OFF Power seat control unit/A31 (BLU/BLK) Transmission in P: 0 V Faulty transmission range switch (see «TRANSMISSION RANGE SWITCH TEST»(ref-513840-S29706734082012111600000) ) An open or high resistance in the wire Faulty control unit Ignition switch for power seat control Ignition switch ON (II): ON Ignition switch LOCK (0): OFF Power seat control unit/A35 (YEL) Ignition switch to ON (II): 12 V Blown No. 1 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire Faulty control unit Slide Position Sensor Seat moving forward or rearward: ON Seat not moving: OFF Power seat control unit/A11 (YEL/GRN) Pulses as seat moves, 2.5 V average Faulty slide position sensor An open or high resistance in the wire Faulty control unit Front Up-Down Position Sensor Seat front moving up/down: ON Seat not moving: OFF Power seat control unit/A12 (YEL/BLK) Pulses as seat moves, 2.5 V average Faulty front up-down position sensor An open or high resistance in the wire Faulty control unit Recline Position Sensor Seat back moving forward or rearward: ON Seat not moving: OFF Power seat control unit/A10 (WHT/RED) Pulses as seat moves, 2.5 V average Faulty recline position sensor An open or high resistance in the wire Faulty control unit Rear Up-Down Position Sensor Seat rear moving up/down: ON Seat not moving: OFF Power seat control unit/A13 (YEL/BLK) Pulses as seat moves, 2.5 V average Faulty rear up-down sensor An open or high resistance in the wire Faulty control unit Seat SET Switch Seat SET switch pressed: ON Switch released: OFF Power seat control unit/A20 (WHT) Seat SET switch pressed: 0 V; Switch released: more than 5 V Faulty driving position memory switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(ref-513910-S24727432132012111600000) ) An open or high resistance in the wire Faulty control unit Driver 1 Position Switch Driver 1 position switch pressed: ON Switch released: OFF Power seat control unit/A18 (BLU) Driver 1 position switch pressed: 0 V; Switch released: more than 5V Faulty driving position memory switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(ref-513910-S24727432132012111600000) ) An open or high resistance in the wire Faulty control unit Driver 2 Position Switch Driver 2 position switch pressed: ON Switch released: OFF Power seat control unit/A19 (BLU/YEL) Driver 2 position switch pressed: 0 V; Switch released: more than 5V Faulty driving position memory switch (see «DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT»(ref-513910-S24727432132012111600000) ) An open or high resistance in the wire Faulty control unit Driver 1 Position Indicator Driver 1 Position Indicator on: ON Driver 1 Position Indicator off: OFF Function Test: Go to step 6 N/A Driver 2 Position Indicator Driver 2 Position Indicator on: ON Driver 2 Position Indicator off: OFF Function Test: Go to step 6 N/A Slide Motor Command As seat moves forward or rearward: ON Seat not moving: OFF Function Test: Go to step 6 N/A Recline Motor Command As seat back moves forward or rearward: ON Seat not moving: OFF Function Test: Go to step 6 N/A Front Height Motor Command As front of seat moves up or down: ON Seat not moving: OFF Function Test: Go to step 6 N/A Rear Height Motor Command As rear of seat moves up or down: ON Seat not moving: OFF Function Test: Go to step 6 N/A Power Seat Buzzer Command Power seat buzzer commanded on: ON Power seat buzzer commanded off: OFF Function Test: Go to step 6 N/A
- Exit the DATA LIST and select FUNCTION TEST.
- Do each of the function tests listed in the table below. The appropriate output should occur. If the function operates normally, go to the next function test. If all function tests operate normally, the system is OK. If the function does not occur, do the appropriate test at the control unit and terminal indicated in the table? Voltage drop tests should be done with the ignition switch to ON (II) and all connectors connected Continuity tests should be done with the ignition switch to LOCK(0) and indicated terminals disconnected Jumper tests should be done according to the instructions indicated. If the test indicates that the component operates normally, but the function does not operate with the function test or the normal use of the component, the control unit that operates that function must be faulty; replace it. If the test indicates that the component does not operate normally, check for an open or short in the harnesses between the component and the control unit. If the harness is OK, replace the component.
| Function Test | Component and operation | Control Unit/Terminal Number/Test (If applicable) | Possible cause if desired result is not obtained |
|---|---|---|---|
| Memory Seat Indicator 1 | Memory seat indicator 1 illuminates? | Power seat control unit/A16(GRN) Disconnect power seat control unit connector A. Connect A16 to A9; position button indicator 1 should come on. | Faulty driving position memory switch (see DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT ) An open or high resistance in the wire A short to ground in the wire |
| Memory Seat Indicator 2 | Memory seat indicator 2 illuminates | Power seat control unit/A17 (RED) Disconnect power seat control unit connector A. Connect A17 to A9; position button indicator 2 should come on. | Faulty driving position memory switch (see DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT ) An open or high resistance in the wire A short to ground in the wire |
POWER SEAT INDICATOR
| Function Test | Component and operation | Control Unit/Terminal Number/Test (If applicable) | Possible cause if desired result is not obtained |
|---|---|---|---|
| Slide Motor-Full Forward | Seat slides forward | Power seat control unit/B1 (WHT/RED), B4 (BLK), B7 (WHT), B17(YEL) Disconnect power seat control unit connector B. Connect B1 to B17 and B7 to B4; driver's seat should slide forward. | Faulty slide motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Slide Motor-Full Backward | Seat slides backward | Power seat control unit/B1 (WHT/RED), B4 (BLK), B7 (WHT), B17(YEL) Disconnect power seat control unit connector B. Connect B1 to B7 and B17 to B4; driver's seat should slide rearward. | Faulty slide motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Front Up-Down Motor-Full Up | Front of seat moves up | Power seat control unit/B1 (WHT/RED), B4 (BLK), B6 (YEL), B16(ORN) Disconnect power seat control unit connector B. Connect B1 to B16 and B6 to B4; front of driver's seat should move up. | Faulty front up-down motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Front Up-Down Motor-Full Down | Front of seat moves down | Power seat control unit/B1 (WHT/RED), B4 (BLK), B6 (YEL), B16(ORN) Disconnect power seat control unit connector B. Connect B1 to B6 and B16 to B4; front of driver's seat should move down. | Faulty front up-down motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Rear Up-Down Motor-Full Up | Rear of seat moves up | Power seat control unit/B1 (WHT/RED), B2 (GRN), B4 (BLK), B10(BLU/GRN) Disconnect power seat control unit connector B. Connect B1 to B2 and B10 to B4; driver's seat should move up. | Faulty rear up-down motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Rear Up-Down Motor-Full Down | Rear of seat moves down | Power seat control unit/B1 (WHT/RED), B2 (GRN), B4 (BLK), B10(BLU/GRN) Disconnect power seat control unit connector B. Connect B1 to B10 and B2 to B4; driver's seat should move down. | Faulty rear up-down motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Recline Motor-Full Forward | Seat back moves forward | Power seat control unit/B1 (WHT/RED), B4 (BLK), B9 (GRY), B11 (RED) Disconnect power seat control unit connector B. Connect B1 to B9 and B11 to B4; driver's seat back should move forward. | Faulty recline motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
| Recline Motor-Full Backward | Seat back moves backward | Power seat control unit/BI (WHT/RED), B4 (BLK), B9 (GRY), B11 (RED) Disconnect power seat control unit connector B. Connect B1 to B11 and B9 to B4; driver's seat back should move rearward. | Faulty recline motor (see DRIVER'S POWER SEAT MOTOR TEST ) An open or high resistance in the wire A short to ground in the wire |
POWER SEAT
Power Seat Control Unit Input Test/Replacement
Note. SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ) Power Seat Control Unit appears as MEMORY SEAT CONTROL UNIT on HDS display screen.
Scheme 108
- Turn the ignition switch to LOCK (0).
- Remove the driver's power seat (see «FRONT SEAT REMOVAL/INSTALLATION»(ref-513882-S34880323822012111600000) ). NOTE: Be careful not to scratch the interior trim.
- Disconnect the connectors from the power seat control unit (A).
- Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to step 5.
- Reconnect the connectors to the power seat control unit, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| A9 . B4 . B18 | BLK | In all ignition switch positions | Measure the voltage to ground: There should be less than 0.2 V. | Poor ground (G551) An open or high resistance in the ground wire |
| A35 | YEL | Ignition switch ON (II) | Measure the voltage to ground: There should be battery voltage. | Blown No. 1 (7.5 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire |
| A37 | WHT/RED | Under all conditions | Measure the voltage to ground: There should be battery voltage. | Blown No. 23 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire |
| B1 | WHT/RED | Under all conditions | Measure the voltage to ground: There should be battery voltage. | Blown No. 13 (20 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire |
| B8 | WHT/BLU | Under all conditions | Measure the voltage to ground: There should be battery voltage. | Blown No. 14 (20 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire |
| A16 | GRN | Under all conditions | Attach to ground: The driving position memory switch indicator 1 should come on. | Blown No. 23 (10 A) fuse in the under-hood fuse/relay box Faulty driving position memory switch An open or high resistance in the wire |
| A17 | RED | Under all conditions | Attach to ground: The driving position memory switch indicator 2 should come on. | Blown No. 23 (10 A) fuse in the under-hood fuse/relay box Faulty driving position memory switch An open or high resistance in the wire |
| A18 | BLU | Press the No. 1 button of the driving position memory switch | Measure the voltage to ground: There should be less than 0.2 V. | Poor ground (G501) or an open in the ground wire Faulty driving position memory switch An open or high resistance in the wire |
| A19 | BLU/YEL | Press the No. 2 button of the driving position memory switch | Measure the voltage to ground: There should be less than 0.2 V. | Poor ground (G501) or an open in the ground wire Faulty driving position memory switch An open or high resistance in the wire |
| A20 | WHT | Press the SET button of the driving position memory switch | Measure the voltage to ground: There should be less than 0.2 V. | Poor ground (G501) or an open in the ground wire Faulty driving position memory switch An open or high resistance in the wire |
| A31 | BLU/BLK | Shift lever in P position | Measure the voltage to ground: There should be less than 0.2 V. | Poor ground (G101) or an open in the ground wire Faulty transmission range switch An open or high resistance in the wire |
Scheme 109
Scheme 110
- Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-513890-S28354617482012111600000) ).
- Disconnect the 10P connector from the driving position memory switch (A).
- Remove the four screws, then remove the switch from the door panel.
- Check for continuity between the terminals in each switch position according to the table. NOTE: Make sure the correct test lead (+ or -) is placed on the terminal. When checking for continuity across the diode, use the diode setting on the digital volt/ohm meter to check the diode bias. Note this important operation characteristic; a diode is one that conducts fully in one direction (forward) and not at all in the opposite direction (reverse).
- If the continuity is not as specified, replace the switch.
Driver's Power Seat Motor Test
Note. SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.
Scheme 111
Scheme 112
Scheme 113
Scheme 114
Scheme 115
Scheme 116
- Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(ref-513882-S34880323822012111600000) ).
- Remove the back cover for recline motor (see «FRONT SEAT-BACK COVER/PAD REPLACEMENT»(ref-513882-S35061484722012111600000) ).
- Disconnect the connector from each power seat motor. NOTE: All connectors are terminal side of male terminals.
- Test each motor by connecting power and ground according to the table. When the motor stops running, disconnect battery power immediately.
- If the slide motor does not run or fails to run smoothly, replace it (see «FRONT SEAT FRAME REPLACEMENT - DRIVER'S SEAT»(ref-513882-S33514128592012111600000) ). NOTE: If the front up-down motor, the rear up-down motor, or the recline motor does not run or fails to run smoothly, replace the seat frame assembly (see «FRONT SEAT FRAME REPLACEMENT - DRIVER'S SEAT»(ref-513882-S33514128592012111600000) ).