Test NS-6B: Repairing No Response Condition
NOTE:
Perform TEST NS-6A: REPAIRING NO RESPONSE CONDITION before proceeding.
- If ignition was on when NO RESPONSE message was displayed on scan tool, go to next step. If ignition was not on when NO RESPONSE message was displayed on scan tool, turn ignition on to get a response. Test is complete. Perform TEST VER-1A: NO START VERIFICATION .
- Disconnect scan tool from Data Link Connector (DLC). Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, check resistance of Serial Communications Interface (SCI) transmit circuit at Data Link Connector (DLC). See DATA LINK CONNECTOR WIRE IDENTIFICATION table. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on SCI transmit circuit. Perform TEST VER-1A: NO START VERIFICATION .
- Using an ohmmeter, check resistance of Serial Communications Interface (SCI) receive circuit at DLC. See DATA LINK CONNECTOR WIRE IDENTIFICATION table. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on SCI receive circuit. Perform TEST VER-1A: NO START VERIFICATION .
- Using an ohmmeter, check resistance of SCI transmit circuit between DLC and PCM connector terminal No. 65. See DATA LINK CONNECTOR WIRE IDENTIFICATION table and PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open SCI transmit circuit. Perform TEST VER-1A: NO START VERIFICATION .
- Using an ohmmeter, check resistance of SCI receive circuit between DLC and PCM connector terminal No. 75. See DATA LINK CONNECTOR WIRE IDENTIFICATION table and PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open SCI receive circuit. Perform TEST VER-1A: NO START VERIFICATION .
- Connect scan tool to another vehicle. Turn ignition on. Using scan tool, attempt to read DTCs. If scan tool displayed NO RESPONSE, go to next step. If scan tool did not display NO RESPONSE, replace initial vehicle's PCM. Perform TEST VER-1A: NO START VERIFICATION .
- Substitute another scan tool adapter cable. Using scan tool, attempt to read DTCs. If scan tool displayed NO RESPONSE, have scan tool serviced or replaced. If scan tool did not display NO RESPONSE, replace scan tool adapter cable.
DATA LINK CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color |
|---|---|
| SCI Receive Circuit | Light Green |
| SCI Transmit Circuit | Dark Blue |
PCM CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color | |
|---|---|---|
| SCI Receive Circuit | ||
| PCM Terminal No. 75 | Light Green | |
| SCI Transmit Circuit | ||
| PCM Terminal No. 65 | Dark Blue | |