System Input Test and Function Test
NOTE:
Make sure you have the latest software on the HDS before troubleshooting.
- Connect the HDS to the DLC.
- Turn the ignition switch 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 Diagnostic Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- 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 on the data list under the condition listed 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 performed with the ignition switch ON (II) and all connectors connected and the meter negative test lead attached to a good body ground or the battery negative post.
- Continuity tests should be performed with the ignition switch OFF and the indicated terminals disconnected.
- Check terminal fit and ground G601 before doing any test.
POSSIBLE CAUSE REFERENCE CHARTData 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: OFFPower seat control unit/A7 (RED/WHT), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the RED/WHT wire
- Faulty power seat control unit
Slide Switch Backward Slide switch backward: ON
Switch released: OFFPower seat control unit/A27 (ORN), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the ORN wire
- Faulty power seat control unit
Recline Switch Forward Recline switch forward: ON
Switch released: OFFPower seat control unit/A6 (PNK), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the PNK wire
- Faulty power seat control unit
Recline Switch Backward Recline switch backward: ON
Switch open: OFFPower seat control unit/A25 (PUR), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the PUR wire
- Faulty power seat control unit
Front Up-Down Switch Up Front up-down switch up: ON
Switch released: OFFPower seat control unit/A5 (LT GRN), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the LT GRN wire
- Faulty power seat control unit
Front Up-Down Switch Down Front up-down switch down: ON
Switch released: OFFPower seat control unit/A4 (RED/BLK), A1 (BLK) - Faulty power seat adjust switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the RED/BLK wire
- Faulty power seat control unit
Rear Up-down switch Up Rear up-down switch up: ON
Switch released: OFFPower seat control unit/A23 (GRN/ORN), A1 (BLK) - Faulty power seat adjustment switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the GRN/ORN wire
- Faulty power seat control unit
Rear Up-down Switch Down Rear up-down switch down: ON
Switch released: OFFPower seat control unit/A3 (GRY), A1 (BLK) - Faulty power seat adjustment switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in either wire
- A short in the GRY wire
- Faulty power seat control unit
Reverse Switch Transmission in P: ON
Transmission out of P: OFFPower seat control unit/A31 (BLU/BLK) Transmission in P: 0 V Transmission out of P: 12 V - Faulty power seat adjustment switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or short to ground in the wire
- Faulty power seat control unit
Parking brake switch Lever pulled: ON
Lever released: OFFPower seat control unit/A31 (BLU/BLK) Lever pulled: 0 V Lever released: 12 V - Faulty parking brake switch (see PARKING BRAKE SWITCH TEST ).
- An open or short to ground wire
- Faulty power seat control unit
Ignition switch for power seat control Ignition switch ON (II): ON
Ignition switch off: OFFPower seat control unit/A35 (YEL) Ignition switch ON (II): 12 V - Blown No. 18 (15 A) fuse in the under-dash fuse/relay box
- An open in the wire
- A short in the wire if fuse was blown
- Faulty power seat control unit
Slide Position Sensor Seat moving forward or rearward: ON
Seat not moving: OFFPower seat control unit/A11 (YEL/GRN) Pulses as seat moves, 2.5 V average - Faulty slide position sensor
- An open or short in the wire
- Faulty power seat control unit
Front Up-Down Position Sensor Seat front moving up/down: ON
Seat not moving: OFFPower seat control unit/A12 (YEL/BLK) Pulses as seat moves, 2.5 V average - Faulty front up-down position sensor
- An open or short in the wire
- Faulty power seat control unit
Recline Position Sensor Seat back moving forward or rearward: ON
Seat not moving: OFFPower seat control unit/A10 (BLU/WHT) Pulses as seat moves, 2.5 V average - Faulty recline position sensor
- An open or short in the wire
- Faulty power seat control unit
Rear Up-down Position Sensor Seat rear moving up/down: ON
Seat not moving: OFFPower seat control unit/A13 (GRN/WHT) Pulses as seat moves, 2.5 V average - Faulty rear up-down position sensor
- An open or short in the wire
- Faulty power seat control unit
Seat MEMO Switch Seat MEMO switch pressed: ON
Switch released: OFFPower seat control unit/A20 (WHT) Seat MEMO switch pressed: 0 V; Switch released: 5 V or more - Faulty driving position memory switch
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Driver 1 position Switch Driver 1 position switch pressed: ON
Switch released: OFFPower seat control unit/A18 (BLU) Driver 1 position switch pressed: 0 V; Switch released: 5 V or more - Faulty driving position memory switch
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Driver 2 position Switch Driver 2 position switch pressed: ON
Switch released: OFFPower seat control unit/A19 (BLU/YEL) Driver 2 position switch pressed: 0 V; Switch released: 5 V or more - Faulty driving position memory switch
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Driver 1 Position Indicator Driver 1 Position Indicator on: ON
Driver 1 Position Indicator off: OFFFunction Test: Go to step 6 - Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- An open in the wire
- A short in the wire
- Faulty power seat control unit
- Faulty input
Driver 2 Position Indicator Driver 2 Position Indicator on: ON
Driver 2 Position Indicator off: OFFFunction Test: Go to step 6 - Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- An open in the wire
- A short in the wire
- Faulty power seat control unit
- Faulty input
Slide Motor Command As seat moves forward or rearward: ON
Seat not moving: OFFFunction Test: Go to step 6 - Faulty slide motor
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Recline Motor Command As seat back moves forward or rearward: ON
Seat not moving: OFFFunction Test: Go to step 6 - Faulty recline motor
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Front Height Motor Command As front of seat moves up or down: ON
Seat not moving: OFFFunction Test: Go to step 6 - Faulty front up-down motor
- An open in the wire
- A short in the wire
- Faulty power seat control unit
Rear Height Motor Command As rear of seat moves up or down: ON
Seat not moving: OFFFunction Test: Go to step 6 - Faulty rear up-down motor
- An open in the wire
- A short in the wire
- Faulty control unit
Power Seat Buzzer Command Power seat buzzer commanded on: ON
Power seat buzzer commanded off: OFFFunction Test: Go to step 6 - An open in the wire
- A short in the wire
- Faulty power seat control unit
- Exit the DATA LIST and select Function Test.
- Perform 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 operate normally, perform the appropriate test at the control unit and terminal indicated in the table.
- Voltage drop tests should be performed with the ignition switch ON (II) and ail connectors connected
- Continuity tests should be performed with the ignition switch OFF and the 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 harness between the component and the control unit. If the harness is OK, replace the component.
Power Seat Indicator
POWER SEAT INDICATOR POSSIBLE CAUSE REFERENCE CHARTFunction 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; memory seat indicator 1 should come on. - Faulty driving position memory switch
- An open in the wire
- A short 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; memory seat indicator 2 should come on. - Faulty driving position memory switch
- An open in the wire
- A short in the wire
Power Seat
POWER SEAT POSSIBLE CAUSE REFERENCE CHARTFunction 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 (BRN), B7 (LT GRN), 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
- An open in the wire
- A short in the wire
Slide Motor-Full Backward Seat slides rearward Power seat control unit/B1 (WHT/RED), B4 (BRN), B7 (LT GRN), B17 (YEL) Disconnect power seat control unit connector B. Connect B1 to B7 and B17 to B4; driver's seat should slide backward. - Faulty slide motor
- An open in the wire
- A short in the wire
Front UP-DOWN Motor-Full Up Front of seat moves up Power seat control unit/B1 (WHT/RED), B4 (BRN), B6 (BRN/WHT), 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
- An open in the wire
- A short in the wire'
Front UP-DOWN Motor-Full Down Front of seat moves down Power seat control unit/B1 (WHT/RED), B4 (BRN), B6 (BRN/ WHT), 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
- An open in the wire
- A short in the wire
Rear Up-Down Motor-Full Up Rear of seat moves up Power seat control unit/B1 (WHT/RED), B2 (GRN), B4 (BRN), B10 (BLU) Disconnect power seat control unit connector B. Connect B1 to B2 and BIO to B4; driver's seat should move up. - Faulty rear up-down motor
- An open in the wire
- A short in the wire
Rear Up-Down Motor-Full Down Rear of seat moves down Power seat control unit/B1 (WHT/RED), B2 (GRN), B4 (BRN), B10
(BLU) 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
- An open in the wire
- A short in the wire
Recline Motor-Full Forward Seat back moves forward Power seat control unit/B1 (WHT/RED), B4 (BRN), B9 (RED), B11 (GRY) 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
- An open in the wire
- A short in the wire
Recline Motor-Full Backward Seat back moves backward Power seat control unit/B1 (WHT/RED), B4 (BRN), B9 (RED), B11 (GRY) Disconnect power seat control unit connector B. Connect B1 to B11 and B9 to B4; driver's seat back should move backward. - Faulty recline motor
- An open in the wire
- A short in the wire