System Input Test and Function Test
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the HDS to the DLC.
- Turn the ignition switch ON (II).
- From the BODY ELECTRICAL SYSTEM SELECTION 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 ).
- 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, do the appropriate test at the control unit and terminal indicated in the table.
- Voltage drop tests should be done with the ignition switch ON (II) and all connectors connected and the meter negative test lead attached to a good body ground, unless specified otherwise.
- Continuity tests should be done with the ignition switch in LOCK (0) and indicated terminals disconnected.DATA LIST
Data List Input/Command Condition: Data List Indication Control Unit/Terminal Number/ Test (If applicable) Possible cause if desired result is not obtained Door Mirror UP switch Mirror select switch in LEFT, then RIGHT
Mirror up switch pressed: ON
Mirror up switch released: OFFMICU/P9 (WHT)
Mirror select switch UP: 0 V
Center or DOWN: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Door Mirror Select in LEFT selection Mirror select switch in LEFT position: ON
Select switch in CENTER or RIGHT position: OFFMICU/P11 (PUR)
Mirror select switch LEFT: 0 V
Center or RIGHT: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Door Mirror DOWN switch Mirror select switch in LEFT, then RIGHT
Mirror down switch pressed: ON
Mirror switch released: OFFMICU/P10 (PNK)
Mirror select switch DOWN: 0 V
Center or UP: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Door Mirror Select in RIGHT selection Mirror select switch in RIGHT position: ON
Select switch in CENTER or LEFT position: OFFMICU/P22 (GRY)
Mirror select switch RIGHT: 0 V
Center or LEFT: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Door Mirror LEFT switch Mirror select switch in LEFT, then RIGHT
Mirror left switch pressed: ON
Mirror switch released: OFFMICU/P25 (GRN)
Mirror select switch LEFT: 0 V
Center or RIGHT: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Door Mirror RIGHT switch Mirror select switch in LEFT, then RIGHT
Mirror right switch pressed: ON
Mirror switch released: OFFMICU/P26 (BLU)
Mirror select switch RIGHT: 0 V
Center or LEFT: 5 V- Faulty switch (see POWER MIRROR SWITCH TEST/ REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Slide Switch Forward Slide switch forward: ON
Switch released: OFFPower seat control unit/A1, A7 (GRY)
Slide switch forward: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Slide Switch Backward Slide switch backward: ON
Switch released: OFFPower seat control unit/A1, A27 (LTGRN)
Slide switch backward: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Recline Switch Forward Recline switch forward: ON
Switch released: OFFPower seat control unit/A1, A6 (LT BLU)
Recline switch forward: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Recline Switch Backward Recline switch backward: ON
Switch released: OFFPower seat control unit/A1, A25 (GRN)
Recline switch backward: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Front Up-Down Switch Up Front up-down switch up: ON
Switch released: OFFPower seat control unit/A1, A5 (ORN)
Front up-down switch up: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Front Up-Down Switch Down Front up-down switch down: ON
Switch released: OFFPower seat control unit A1, A4 (RED)
Front up-down switch down: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Rear Up-Down Switch Up Rear up-down switch up: ON
Switch released: OFFPower seat control unit/A1, A23 (PNK)
Rear up-down switch up: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Rear Up-Down Switch Down Rear up-down switch down: ON
Switch released: OFFPower seat control unit/A1, A3 (WHT)
Rear up-down switch up: 0 V
Switch released: 5 V- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty 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. 21 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
- Faulty control unit
A/T Gear Position Switch (P) Transmission range switch P position: ON
Any other position than P: OFFPower seat control unit/A31 (GRN)
Transmission range switch P: 0V- Faulty transmission range switch
- An open in the wire
- Faulty control unit
Seat MEMO Switch Seat MEMO switch pressed: ON
Switch released: OFFDriver's MPCS unit/A31 (ORN)
Seat MEMO switch pressed: 0 V
Switch released: 5 V more- Faulty switch (see DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
- Poor ground (G601)
Driver 1 Position Switch Driver position 1 switch pressed: ON
Switch released: OFFDriver's MPCS unit/A29 (GRN)
Driver's position 1 switch pressed: 0 V
Switch released: 5 V more- Faulty switch (see DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
- Poor ground (G601)
Driver 2 Position Switch Driver position 2 switch pressed: ON
Switch released: OFFDriver's MPCS unit/A30 (RED)
Driver's position 2 switch pressed: 0 V
Switch released: 5 V more- Faulty switch (see DRIVING POSITION MEMORY SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
- Poor ground (G601)
Column Tilt Up Switch Steering tilt switch up: ON
Switch released: OFFPower tilt/telescopic steering control unit/A15(BRN),A7 (LT GRN)
Switch in TILT UP: 0V
Switch released: Battery voltage- Faulty switch (see POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Column Tilt Down Switch Steering tilt switch down: ON
Switch released: OFFPower tilt/telescopic steering control unit/A15(BRN),A6 (GRN)
Switch in TILT DOWN: 0V
Switch released: Battery voltage- Faulty switch (see POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Column Telescopic Extend Switch Steering telescopic switch extend: ON
Switch released: OFFPower tilt/telescopic steering control unit/A15 (BRN), A14 (PUR)
Switch in TELESCOPIC EXTEND: 0 V
Switch released: Battery voltage- Faulty switch (see POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Column Telescopic Retract Switch Steering telescopic switch retract: ON
Switch released: OFFPower tilt/telescopic steering control unit/A15 (BRN), A6 (GRN)
Switch in TELESCOPIC RETRACT: 0 V
Switch released: Battery voltage- Faulty switch (see POWER TILT/TELESCOPIC STEERING SWITCH TEST/REPLACEMENT )
- An open in the wire
- A short in the wire
- Faulty control unit
Ignition Switch (IG1) Ignition switch ON (II): ON
Ignition switch OFF: OFFPower tilt/telescopic steering control unit/A9 (YEL)
Ignition switch ON (II): 12 V- Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
- Faulty control unit
Slide Sensor Seat moving forward or backward: ON
Seat not moving: OFFPower seat control unit/A11 (WHT)
Pulses as seat moves: 2.5 V average- Faulty sensor
- An open in the wire
- Faulty control unit
Front Up-Down Sensor Seat front moving up/down: ON
Seat not moving: OFFPower seat control unit/A12 (RED)
Pulses as seat moves: 2.5 V average- Faulty sensor
- An open in the wire
- Faulty control unit
Recline Sensor Seat back moving forward or backward: ON
Seat not moving: OFFPower seat control unit/A10 (GRN)
Pulses as seat moves: 2.5 V average- Faulty sensor
- An open in the wire
- Faulty control unit
Rear Up-Down Sensor Seat rear moving up/down: ON
Seat not moving: OFFPower seat control unit/A13 (YEL)
Pulses as seat moves: 2.5 V average- Faulty sensor
- An open in the wire
- Faulty control unit
Column Tilt Sensor Up/Down Steering tilting up/down: ON
Steering not moving: OFFPower tilt/telescopic steering control unit/A2 (PNK) to A16 (GRN) as steering moves: 12 V A16 (GRN) to A13 (YEL), A5 (LT BLU)
Pulses as steering moves: 2.5 V average- Faulty sensor
- An open in the wire(s)
- Faulty control unit
Column Telescopic Sensor Extend/ Retract Steering telescopic extend/ retract: ON
Steering not moving: OFFPower tilt/telescopic steering control unit/A2 (PNK) to A16 (GRN) as steering moves: 12 V A16(GRN) to A12(BLU),A4 (ORN)
Pulses as steering moves: 2.5 V average- Faulty sensor
- An open in the wire(s)
- Faulty control unit
Left mirror horizontal sensor Left mirror moves left/right: NORMAL
Left mirror does not move: ABNORMALDriver's MPCS unit/A10 (PUR), A19(ORN)
Left mirror moving from full left to full right: A10 (about 0.5 V to 4.5V),A19(5V or more)- Faulty sensor
- An open in the wire
- Faulty control unit
Left mirror vertical sensor Left mirror moves up/down: NORMAL
Left mirror stopped: ABNORMALDriver's MPCS unit/A9 (LT BLU), A19(ORN)
Left mirror moving from full left to full right: A9 (about 0.5 V to 4.5V),A19(5V or more)- Faulty sensor
- An open in the wire
- Faulty control unit
Right door mirror horizontal sensor Right mirror moves left/right: NORMAL
Right mirror stopped: ABNORMALFront passenger's MPCS unit/A6 (PNK),A13(YEL)
Right mirror moving from full left to full right: A6 (about 0.5 V to 4.5 V), A13 (5 V or more)- Faulty sensor
- An open in the wire
- Faulty control unit
Right door mirror vertical sensor Right mirror moves up/down: NORMAL
Right mirror stopped: ABNORMALFront passenger's MPCS unit/A5 (PUR),A13(YEL)
Right mirror moving from full left to full up: A5 (about 0.5 V to 4.5V),A13(5V or more)- Faulty sensor
- An open in the wire
- Faulty control unit
DPMS MEM switch Driving position memory switch
MEMO button pushed: ON
Switch released: OFFDriver's MPCS unit/A31 (ORN)
Driving position memory switch
MEMO button pushed: A31 (about 1 V or less)
MEMO button released: A31 (5 V or more)- Faulty switch
- An open in the wire
- A short in the wire
- Faulty control unit
DPMS POS1 switch Driving position memory switch
POS1 button pushed: ON
Switch released: OFFDriver's MPCS unit/A29 (GRN)
Driving position memory switch MEMO button pushed: A29 (about 1 V or more)
MEMO button released: A29 (5 V or more)- Faulty switch
- An open in the wire
- A short in the wire
- Faulty control unit
DPMS POS2 switch Driving position memory switch
POS2 button pushed: ON
Switch released: OFFDriver's MPCS unit/A30 (RED)
Driving position memory switch
MEMO button pushed: A30 (about 1 V or more)
MEMO button released: A30 (5 V or more)- Faulty switch
- An open in the wire
- A short in the wire
- Faulty control unit
- Exit the DATA LIST and select FUNCTION TEST.
- Do each of the function tests listed in the table shown. 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 ON (II) and all connectors connected.
- Continuity tests should be done with the ignition switch 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 will not operate by doing 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.COMPONENT AND OPERATION CHART
Function Test Component and Operation Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Power Seat: Slide
Motor-Full ForwardSeat slides forward Power seat control unit/B8 (ORN), A9 (BLK), B7 (GRY), B17(BLU)
Disconnect the power seat control unit connectors A and B. Connect B8 to B17 and B7 to A9; driver's seat should slide forward.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Slide
Motor-Full BackwardSeat slides backward Power seat control unit/B8 (ORN), A9 (BLK), B7 (GRY), B17(BLU)
Disconnect the power seat control unit connectors A and B. Connect B8 to B7 and B17 to A9; driver's seat should slide backward.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Front UP-DOWN Motor-Full Up Front of seat moves up Power seat control unit/B8 (ORN), A9 (BLK), B6 (BRN), B16(PUR)
Disconnect the power seat control unit connectors A and B. Connect B8 to B16 and B6 to A9; front of driver's seat should move up.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Front UP-DOWN Motor-Full Down Front of seat moves down Power seat control unit/B8 (ORN), A9 (BLK), B6 (BRN), B16(PUR)
Disconnect the power seat control unit connectors A and B. Connect B8 to B6 and B16 to A9; front of driver's seat should move down.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Rear Up-Down Motor-Full Up Rear of seat moves up Power seat control unit/B1 (LT BLU), A9 (BLK), B2 (GRN), B10 (PNK)
Disconnect the power seat control unit connectors A and B. Connect B1 to B2 and B10 to A9; rear of driver's seat should move up.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Rear Up-Down Motor-Full Down Rear of seat moves down Power seat control unit/B1 (LT BLU), A9 (BLK), B2 (GRN), B10(PNK)
Disconnect the power seat control unit connectors A and B. Connect B1 to B10 and B2 to A9; rear of driver's seat should move down.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Recline
Motor-Full ForwardSeat back moves forward Power seat control unit/B1 (LT BLU), A9 (BLK), B9 (YEL), B11 (LTGRN)
Disconnect power seat control unit connectors A and B. Connect B1 to B11 and B9 to A9; driver's seat back should move forward.- Faulty motor
- An open in the wire
- A short in the wire
Power Seat: Recline Motor-Full Backward Seat back moves backward Power seat control unit/B1 (LT BLU), A9 (BLK), B9 (YEL), B11 (LTGRN)
Disconnect power seat control unit connectors A and B. Connect B1 to B9 and B11 to A9; driver's seat back should move backward.- Faulty motor
- An open in the wire
- A short in the wire
Column Tilt Up Power tilt/telescopic steering tilts up Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B7 (ORN), B8 (LT BLU)
Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B7 and B1 to B8; steering tilts up.- Faulty motor
- An open in the wire
- A short in the wire
Column Tilt Down Power till/telescopic steering tilts down Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B7 (ORN), B8 (LT BLU)
Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B8 and B1 to B7; steering tilts down.- Faulty motor
- An open in the wire
- A short in the wire
Column Telescopic Extend Power tilt/telescopic steering telescopic extend Power tilt/telescopic steering control unit/BI (BLK), B3 (WHT), B6 (PNK), B4 (LT GRN)
Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B4 and B1 to B6; steering telescopic extend.- Faulty motor
- An open in the wire
- A short in the wire
Column Telescopic Retract Power tilt/telescopic steering telescopic retract Power tilt/telescopic steering control unit/B1 (BLK), B3 (WHT), B6 (PNK), B4 (LT GRN)
Disconnect tilt/telescopic steering control unit connectors A and B. Connect B3 to B6 and B1 to B4; steering telescopic retract.- Faulty motor
- An open in the wire
- A short in the wire