Door Switch Input Signal Check
- Preliminary Check
Turn ignition off and remove key. Close engine hood and all doors. SECURITY indicator light should be off. Open any door. SECURITY indicator light should flash in one-second intervals. If operation is as specified, door switch is okay. If operation is not as specified, go to next step.
- Check Door Switch Input Signal
Ensure ignition is off. Using DVOM, measure voltage (backprobe) between ground and terminal No. 28 (Red/White wire) and No. 29 (Red wire) at Smart Entrance Control Unit (SECU) harness connector. See Figure
. See WIRING DIAGRAMS
. Ensure voltage is as specified. See DOOR SWITCH CIRCUIT VOLTAGE SPECIFICATIONS
table. If voltage is as specified, door switch is okay. If voltage is not as specified, go to next step.DOOR SWITCH CIRCUIT VOLTAGE SPECIFICATIONS
| Application (Terminal No.) & Condition |
Voltage |
| LF Door (29) |
| Door Open |
Zero |
| Door Closed |
About 5 Volts |
| Other Doors (28) |
| Door Open |
Zero |
| Door Closed |
About 5 Volts |
- Check Door Switch
Ensure ignition is off. Disconnect door switch harness connectors. Using DVOM, check for continuity between door switch terminals under specified conditions. See DOOR SWITCH CONTINUITY SPECIFICATIONS
table. If continuity is not as specified, replace faulty door switch. If continuity is as specified, check for open or short in door switch harnesses. Check for poor door switch ground. Repair as necessary.
DOOR SWITCH CONTINUITY SPECIFICATIONS
| Application (Check Between Terminals No.) & Condition |
Continuity |
| LH Front Door Switches (2 & 3) |
| Door Closed |
No |
| Door Open |
Yes |
| RH Front Back Door Switch (1 & Ground) |
| Door Closed |
No |
| Door Open |
Yes |
| Rear Door Switches (+ & Ground) |
| Door Closed |
No |
| Door Open |
Yes |