Driver Position Memory System (Dpms): Diagnosis Acura TL III facelift

General Troubleshooting Information

Note. Before troubleshooting the DPMS, refer to B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

The self-diagnostic function of the driving position memory system detects system problems. This information can be retrieved by displaying diagnostic trouble code on the driving position memory switch indicator.

System Input Test and Function Test

1. Connect the HDS to the DLC.
2. Turn the ignition switch ON (II).
3. 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»(ref-291548-S06167950512008072900000) ). If no DTCs are found, go to step 4.
4. Exit the DTC mode and select Data List from the Power Seat/Power Mirror Test Mode Menu.
5. Test each input and monitor each output 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 and all connectors connected and the meter negative test lead attached to a good body ground. Continuity tests should be performed with the ignition switch OFF 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 Slide Switch Forward Slide switch forward: ON Switch released: OFF Power seat control unit/A6, A5 (YEL/BLK) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Slide Switch Backward Slide switch back: ON Switch released: OFF Power seat control unit/A16, A5 (YEL/RED) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C1, A5 (RED/WHT) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C7, A5 (RED/YEL) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C2, A5 (GRN/WHT) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C8, A5 (GRN/BLK) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C3, A5 (BLU/ORN) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open 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/C9, A5 (BLU/RED) Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Reverse Switch Transmission in R: ON Transmission out of R: OFF Power seat control unit/A17 (CRN) Transmission in R: 12 V Faulty transmission range switch (see «TRANSMISSION RANGE SWITCH TEST»(ref-291503-S06683753722008072900000) ) (1) Faulty back-up light switch (see «BACK-UP LIGHT SWITCH TEST»(ref-291511-S40682685412008072900000) ) (2) An open in the wire Faulty control unit Faulty MICU Ignition switch for power seat control Ignition switch on (II): ON Ignition switch off: OFF Power seat control unit/A9 (YEL/GRN) Ignition switch ON (II): 12 V Blown No. 20 (15 A) fuse in the under-dash fuse/relay box An open in the wire A short to ground in the wire Faulty control unit Slide Position Sensor Seat moving forward or rearward: ON Seat not moving: OFF Power seat control unit/A2 (BLU) Pulses as seat moves, 2.5 V average Faulty sensor An open 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 (GRN/BLK) Pulses as seat moves, 2.5 V average Faulty sensor An open in the wire Faulty control unit Recline Position Sensor Seat back moving forward or rearward: ON Seat not moving: OFF Power seat control unit/C5 (YEL/BLK) Pulses as seat moves, 2.5 V average Faulty sensor An open 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/C11 (RED/BLK) Pulses as seat moves, 2.5 V average Faulty sensor An open in the wire Faulty control unit Mirror Select Switch LEFT Mirror select switch in LEFT position: ON Select switch in CENTER or RIGHT position: OFF Power mirror control unit/6 (ORN) Mirror Select switch LEFT: 0 V; CENTER or RIGHT: 5 V Faulty switch An open in the wire A short to ground in the wire Faulty control unit Mirror Select Switch RIGHT Mirror select switch in RIGHT position: ON Select switch in CENTER or LEFT position: OFF Power mirror control unit/19 (PNK) Mirror Select switch RIGHT: 0 V; CENTER or LEFT: 5 V Faulty switch An open in the wire A short to ground in the wire Faulty control unit Mirror Select Switch CENTER Mirror select switch in CENTER position: ON Select switch in RIGHT or LEFT position: OFF Power mirror control unit/6 (ORN), 19 (PNK) Mirror Select switch CENTER: 5 V each RIGHT or [LEFT] :6 (5V), 19 (0V) [6 (0 V), 19 (5 V)] Faulty switch (see «POWER MIRROR AND MIRROR DEFOGGER SWITCH TEST/REPLACEMENT»(ref-291595-S01359920032008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Mirror Left Switch Mirror select switch in LEFT, then RIGHT Mirror left switch pressed: ON Mirror switch released: OFF Power mirror control unit/20 (GRN), 21 (BLK), 22 (LT GRN), 6 (ORN), 19(PNK) Mirror Select switch LEFT, left switch pressed: 20 (12 V), 21 (12V), 22 (0V), 6 (0V), 19 (5 V) Mirror Select switch RIGHT, right switch pressed: 20 (12 V), 21 (0 V), 22 (12 V), 6 (5 V), 19 (0 V) Faulty switch (see «POWER MIRROR AND MIRROR DEFOGGER SWITCH TEST/REPLACEMENT»(ref-291595-S01359920032008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Mirror Right Switch Mirror select switch in LEFT, then RIGHT Mirror right switch pressed: ON Mirror switch released: OFF Power mirror control unit/20 (GRN), 21 (BLK), 22 (LT GRN), 6 (ORN), 19(PNK) Mirror Select switch LEFT, right switch pressed: 20 (0 V), 21 (0 V), 22 (0 V), 6 (12 V), 19 (5 V) Mirror Select switch RIGHT, right switch pressed: 20 (0 V), 21 (0V), 22 (0V), 6 (5V), 19 (12 V) Faulty switch (see «POWER MIRROR AND MIRROR DEFOGGER SWITCH TEST/REPLACEMENT»(ref-291595-S01359920032008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Mirror Up Switch Mirror select switch in LEFT, then RIGHT Mirror up switch pressed: ON Mirror switch released: OFF Power mirror control unit/20 (GRN), 21 (BLK), 22 (LT GRN), 6 (ORN), 19(PNK) Mirror Select switch LEFT, down switch pressed: 20 (0 V), 21 (0V), 22 (0V), 6 (12V), 19 (5 V) Mirror Select switch RIGHT, up switch pressed: 20 (0 V), 21 (0 V), 22 (12 V), 6 (5 V), 19 (12 V) Faulty switch (see «POWER MIRROR AND MIRROR DEFOGGER SWITCH TEST/REPLACEMENT»(ref-291595-S01359920032008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Mirror Down Switch Mirror select switch in LEFT, then RIGHT Mirror down switch pressed: ON Mirror switch released: OFF Power mirror control unit/20 (GRN), 21 (BLK), 22 (LT GRN), 6 (ORN), 19(PNK) Mirror Select switch LEFT, down switch pressed: 20 (0 V), 21 (12 V), 22 (0 V), 6 (12 V), 19 (5 V) Mirror Select switch RIGHT, down switch pressed: 20 (0 V), 21 (0V), 22 (12V), 6 (5V), 19 (12 V) Faulty switch (see «POWER MIRROR AND MIRROR DEFOGGER SWITCH TEST/REPLACEMENT»(ref-291595-S01359920032008072900000) ) An open in the wire A short to ground in the wire Faulty control unit Ignition Switch for Power Mirror Control Ignition switch on (II): ON Ignition switch off: OFF Power mirror control unit/12 (YEL/GRN) Ignition switch on: Battery Voltage Blown No. 20 (15 A) fuse in the under-dash fuse/relay box An open in the wire A short to ground in the wire Faulty control unit Seat MEMO Switch Seat MEMO switch pressed: ON Switch released: OFF Door multiplex control unit/A13 (GRY/BLU) Seat MEMO switch pressed: 0 V; Switch released: 5 V or more Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open in the wire Faulty control unit Driver 1 position Switch Driver position 1 switch pressed: ON Switch released: OFF Door multiplex control unit/A4 (BLU/YEL) Driver position 1 switch pressed: 0 V; Switch released: 5 V or more Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open in the wire Faulty control unit Driver 2 position Switch Driver position 2 switch pressed: ON Switch released: OFF Door multiplex control unit/A3 (RED/YEL) Driver position 2 switch pressed: 0 V; Switch released: 5 V or more Faulty switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-291583-S37214967962008072900000) ) An open in the wire Faulty control unit Right Mirror Horizontal Sensor Right mirror moves left/right: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/8 (RED/WHT), 7 (LT GRN/RED), 18 (GRY/RED) Right mirror moving from full right to full left: 8 (5 V), 7 (0 V), 18 (about 0.5 V to about 4.5 V) Faulty sensor An open in the wire Faulty control unit Right Mirror Vertical Sensor Right mirror moves up/down: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/8 (RED/WHT), 7 (LT GRN/RED), 17 (LT BLU) Right mirror moving from full down to full up: 8 (5 V), 7 (0 V), 17 (about 0.5 V to about 4.5 V) Faulty sensor An open in the wire Faulty control unit Left Mirror Horizontal Sensor Left mirror moves left/right: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/8 (RED/WHT), 7 (LT GRN/RED), 4 (WHT/BLK) Left mirror moving from full left to full right: 8 (5 V), 7(0 V), 4 (about 0.5 V to about 4.5 V) Faulty sensor An open in the wire Faulty control unit Left Mirror Vertical Sensor Left mirror moves up/down: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/8 (RED/WHT), 7 (LT GRN/RED), 5 (GRY) Left mirror moving from full down to full up: 8 (5 V), 7 (0 V), 5 (about 0.5 V to about 4.5 V) Faulty sensor An open in the wire Faulty control unit Right Mirror Horizontal Motor command Right mirror commanded to move left/right: ON Right mirror stopped: OFF Function Test: Go to step 6 N/A Right Mirror Vertical Motor command Right mirror commanded to move up/down: ON Right mirror stopped: OFF Function Test: Go to step 6 N/A Left Mirror Horizontal Motor command Left mirror commanded to move left/right: ON Left mirror stopped: OFF Function Test: Go to step 6 N/A Left Mirror Vertical Motor command Left mirror commanded to move up/down: ON Left mirror stopped: OFF Function Test: Go to step 6 N/A 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 Set 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 (1) A/T (2) M/T
6. Exit the Data list and select Function Test.
7. 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 occur, 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 Continuity tests should be perform with the ignition switch OFF 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 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.

Power Seat Indicator

POWER SEAT INDICATOR REFERENCE

Power Seat

POWER SEAT REFERENCE

Power Mirror

POWER MIRROR REFERENCE

Power Seat Control Unit Input Test

Note. Before troubleshooting the DPMS, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 3

1. Turn the ignition switch OFF.
2. Remove the driver's power seat (see «FRONT SEAT REMOVAL/INSTALLATION»(ref-291562-S02957510312008072900000) ). NOTE: Be careful not to scratch the interior trim.
3. Disconnect the connectors from the power seat control unit (A). NOTE: All connectors view are from wire side of female terminals.
4. 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.
5. With the power seat control unit still disconnected, make these input tests at the connectors. 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. WIRE TEST CONDITION REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A8 (1) BLU/BLK Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G501, G503, G601) An open in the wire A20 B7 D1 BLK A9 YEL/GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 20 (15 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire A10 GRY/BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40 A) fuse in the under-hood fuse/relay box Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire B3 WHT/BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 20 (40 A) fuse in the under-hood fuse/relay box Blown No. 14 (20 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire D4 WHT/RED Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 20 (40 A) fuse in the under-hood fuse/relay box Blown No. 16 (20 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire A14 PNK Under-dash fuse/relay box connector G (6P) disconnected Check for continuity between the A14 terminal and under-dash fuse/relay box connector G (6P) No. 1 terminal: There should be continuity. An open in the wire Check for continuity between the A14 terminal and body ground: There should be no continuity. A short to ground in the wire C4 PUR Power mirror control unit connector (26P) disconnected Check for continuity between the C4 terminal and power mirror control unit connector No. 23 terminal: There should be continuity end. An open in the wire Check for continuity between the C4 terminal and body ground: There should be no continuity. A short to ground in the wire (1) M/T

Power Mirror Control Unit Input Test

Note. Before troubleshooting the DPMS, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 4

1. Turn the ignition switch OFF.
2. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(ref-291501-S24802519012008072900000) ).
3. Disconnect the 26P connector (A) from the power mirror control unit (B).
4. 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.
5. With the connector still disconnected, make these input tests at the connector. 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. WIRE TEST CONDITION REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 25 BLK Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G501) An open in the wire 12 YEL/GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 20 (15 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire 13 WHT/RED Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire 26 GRY/BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box A short to ground in the wire An open in the wire 23 PUR Power seat control unit connector C(12P) disconnected Check for continuity between the No. 23 terminal and power seat control unit connector C (12P) No. 4 terminal: There should be continuity. An open in the wire Check for continuity between the No. 23 terminal and body ground: There should be no continuity. A short to ground in the wire