DTC 20, Rap Enable Circuit (Circuit Shorted To Battery): Testing
- Turn ignition switch to OFF position. Remove both RAP relays. Disconnect CCM connector C1. Turn ignition switch to RUN position. Using DVOM, measure voltage between RAP relay connector terminal C2 and ground. Repeat for second relay. If battery voltage is present, repair short to battery in RAP relays control circuit. If battery voltage is not present, go to next step.
- Turn ignition off. Using DVOM, check for continuity between RAP power relay terminals C2 and A2, and terminals C2 and B2. Also, check for continuity between RAP wiper relay terminals C2 and A2, and terminals C2 and B2. If continuity is present for any measurement, replace defective relay. If continuity is not present, go to next step.
- Using DVOM, measure resistance between RAP power relay terminals A1 and C2. Also, measure resistance between RAP wiper relay terminals A1 and C2. Resistance should be 40-100 ohms for RAP power relay and 70-150 ohms for RAP wiper relay. If resistance measurements are not as specified, replace defective relay. If resistance measurements are as specified, go to next step.
- Turn ignition switch to OFF position. Check for poor connections at CCM connector. If connections are okay, reconnect CCM connector and all other components. Clear DTCs and recheck if DTC resets. If DTC resets, replace CCM. If DTC does not reset, problem may be intermittent. Try to recreate fault while performing test by wiggling wiring and connectors. Check for poor connections at all connectors that may be causing intermittent condition.