Door Multiplex Control Unit Input Test
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NOTE:
Before troubleshooting the DPMS, troubleshooting the multiplex integrated control system first using B-CAN System DiagosisTest Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Turn the ignition switch to LOCK (0).
- Open and close the driver's door, then remove the power window master switch (see POWER WINDOW MASTER SWITCH REPLACEMENT ).
- Disconnect the 37P connector (A) from the power window master switch (B).
- 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 next step.
- Reconnect the connector to the power window master switch, 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, go to next step.CONNECTOR INPUT TESTS REFERENCE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 26 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. A15 (10 A) fuse in the under-hood fuse/relay box
- An open or high resistance in the wire
25 LT GRN Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
4 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box
- Blown No. B24 (20 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
31 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G401)
- An open or high resistance in the ground wire
3 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.- Poor ground (G402)
- An open or high resistance in the ground wire
23 RED Ignition switch ON (II), position 2 switch pressed Measure the voltage to ground:
There should be less than 0.2 V.- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
Ignition switch ON (II), position 2 switch released Measure the voltage to ground:
There should be about 5 V.- Faulty driving position memory switch
- A short to ground in the wire
22 GRY Ignition switch ON (II), position 1 switch pressed Measure the voltage to ground:
There should be less than 0.2 V.- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
Ignition switch ON (II), position 1 switch released Measure the voltage to ground:
There should be about 5 V.- Faulty driving position memory switch
- A short to ground in the wire
20 YEL Ignition switch ON (II), SET switch pressed Measure the voltage to ground:
There should be less than 0.2 V.- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
Ignition switch ON (II), SET switch released Measure the voltage to ground:
There should be about 5 V.- Faulty driving position memory switch
- A short to ground in the wire
- Turn the ignition switch to LOCK (0), then disconnect the connector from the power window master switch, 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 door multiplex control unit must be faulty; replace the power window master switch.NOTE: After replacing the power window master switch, reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT ).CONNECTOR INPUT TESTS REFERENCE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 12 GRN Under all conditions Connect terminals No. 26 and No. 12:
The driving position memory switch indicator 2 should come on.- Faulty LED
- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
10 PUR Under all conditions Connect terminals No. 26 and No. 10:
The driving position memory switch indicator 1 should come on.- Faulty LED
- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
37 PNK Under all conditions Connect terminals No. 26 and No. 37:
The driving position memory switch lights should come on.- Faulty LED
- Faulty driving position memory switch
- Poor ground (G401) or an open in the ground wire
- An open or high resistance in the wire
30 BLU Under all conditions (disconnect the power seat control unit connector B (40P)) Check for continuity between terminal No. 30 and power seat control unit connector B (40P) terminal No. 21:
There should be continuity.An open in the B-CAN wire 28 PNK Under all conditions (disconnect the power seat control unit connector B (40P)) Check for continuity between terminal No. 28 and power seat control unit connector B (40P) terminal No. 22:
There should be continuity.An open in the B-CAN wire 36 BLU Disconnect the front passenger's power window switch 37P and the moonroof control unit/motor 14P connectors Check for continuity between terminal No. 36 and the front passenger's power window switch 37P connector terminal No. 34;
There should be continuity.
Check for continuity to ground: There should be no continuity.An open in UART wire
A short in the UART wire