Keypad Input
- Disconnect control module connector J2. Check for short to ground between keypad and connector J2. A reading of 100,000 ohms or less indicates a short. If a short is present, go to next step. If short is not present, go to step 3).
- Remove door trim panel. Disconnect keypad connector. Check for short between keypad connector and ground. Resistance less than 100,000 ohms indicates a short. If resistance is less than 100,000 ohms, replace keypad. If resistance is 100,000 ohms or greater, repair short between control module and keypad.
- Check for continuity between pins No. 13 and 4 of connector J2 with keypad button 1/2 depressed. If continuity exists, go to next step. If no continuity exists, repair open or short in Brown wire.
- With control module connector connected to control module, connect voltmeter between pin No. 8 of connector J2 and ground. For each button that fails to light keypad, momentarily connect jumper between pin No. 4 of connector J2 and pins No. 13, 2, 12, 11 and 2. Wait 5 seconds between jumper connections. If reading is 5 volts or more for 5 seconds during each test, go to next step. If reading is less than 5 volts 5 seconds during each test, replace control module.
- Disconnect keypad connector. Check for continuity between pin No. 8 and every pin on keypad. Then check between pin No. 4 and every pin on keypad until every pin pair has been checked. If all circuits are open except between pins No. 3 and 7, go to next step. If short is found, replace keypad.
- Check for continuity between pin No. 8 and each pin of keypad connector with each keypad depressed. If continuity exists, repair open or short in defective circuit. If no continuity exists, replace keypad.