Test 11: SOLVAC Idle Speed Relay Test
- Disconnect idle speed relay connector and start engine. Determine if battery voltage is applied across pins 85 and 86 of relay connector during the first 60 seconds of operation. If no, proceed to step 4.
- If yes, determine if voltage is applied across pin 30/51 and engine ground. If no, repair voltage supply malfunction and retest. If yes, turn engine off and connect idle speed relay connector. Start engine and determine if voltage is applied across pin 87 and engine ground during the first 60 seconds of operation.
- If no, replace idle speed relay and retest. If yes, and solvac is still not operating, check for open circuit between pin 87 of idle speed relay and solvac connector. Idle speed relay test is complete.
- Determine if voltage is applied across pin 86 and engine ground. If no, repair voltage supply problem and retest. If yes, turn engine off. Disconnect MCU harness connector and test continuity between pin 85 and MCU connector J1 pin 17. If there is no continuity, repair open circuit and retest. If not, replace MCU and retest.