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
).
- Turn the ignition switch to LOCK (0).
- Remove the driver's power seat (see
FRONT SEAT REMOVAL/INSTALLATION
).NOTE: Be careful not to scratch the interior trim.
- Disconnect the connectors from the power seat control unit (A).NOTE: All connector views are from wire side of female terminals.
- 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 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 CAVITY CHART
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A9
.
B4
.
B18BRN Under all conditions Measure the voltage to ground:
There should be less than 1 V.- Poor ground (G602)
- An open in the wire
A35 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A37 WHT/RED 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. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
B1 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 driver's under-dash fuse/relay box
- An open in the wire
B8 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 driver's under-dash fuse/relay box
- An open in the wire
A16 GRN Under all conditions Attach to ground:
The driving position memory switch indicator 1 should come on.- Blown No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box
- Faulty driving position memory switch
- An open in the wire
A17 RED Under all conditions Attach to ground:
The driving position memory switch indicator 2 should come on.- Blown No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box
- Faulty driving position memory switch
- An open in the wire
A18 BLU Press No. 1 button of the driving position memory switch Measure the voltage to ground:
There should be less than 1 V.- Poor ground (G601)
- Faulty driving position memory switch
- An open in the wire
A19 BLU/YEL Press No. 2 button of the driving position memory switch Measure the voltage to ground:
There should be less than 1 V.- Poor ground (G601)
- Faulty driving position memory switch An open in the wire
A20 WHT Press the MEMO button of the driving position memory switch Measure the voltage to ground:
There should be less than 1 V.- Poor ground (G601)
- Faulty driving position memory switch
- An open in the wire
A31 BLU/BLK Shift lever in P position Measure the voltage to ground:
There should be less than 1 V.- Faulty transmission range switch
- An open in the wire
A39 BLK Power mirror control unit connector (24P) and power seat control unit connector A (40P) disconnected Check for continuity between the A39 terminal and the power mirror control unit connector No. 13 terminal:
There should be continuity.An open in the wire Check for continuity between the A39 terminal and body ground:
There should be no continuity.A short to ground in the wire