Trouble Code E63
Trouble code indicates that cruise control was engaged at a certain set speed and vehicle speed was more than 20 MPH above or below this set speed. Whenever condition that set code is present, cruise control will disengage.
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- Code may result from operator error or a system malfunction. To diagnose system malfunctions, proceed as follows:
- Engine must be running.
- Turn engine off and within 2 seconds, turn ignition on.
- Turn cruise control instrument panel switch on.
- Enter diagnostics and output cycling tests (code E.9.6).
- Check cruise control vacuum and power solenoids to determine if they cycle (click) on and off. If vacuum and power valves are okay, check for binding linkage. If linkage is not binding, check for vacuum leaks or blockages. If there are no vacuum problems, then system is okay.
- If vacuum valve does not cycle, disconnect vacuum valve connector and connect test light between harness connector pins while performing output cycling tests. If there is no light, check circuit Nos. 86 or 403 for an open. If wiring is okay, check for shorted cruise control vacuum valve by measuring resistance across valve. If reading is less than 20 ohms, then valve is shorted, causing damage to ECM; therefore, ECM and cruise control vacuum valve should be replaced. If reading is greater than 20 ohms, then valve is operating normally. Check for faulty ECM connector or faulty ECM. If there is a steady light, check circuit No. 403 for short to ground. If circuit is okay, check for faulty ECM connector or faulty ECM. If light is on for 3 seconds and off for 3 seconds, then ECM and wiring harness are okay, replace vacuum valve solenoid.
- If power valve does not cycle, disconnect power valve connector and connect test light between harness connector pins while performing output cycling tests. If there is no light, check circuit No. 402 for short to ground. If circuit No. 402 is shorted, damage may have resulted to ECM; therefore, repair short and check for damaged ECM beginning at step 1). If circuit Nos. 402 and 151 are okay, check for shorted cruise power valve by measuring resistance across valve. If reading is less than 20 ohms, valve is shorted, causing damage to ECM; therefore, ECM and cruise power valve should be replaced. If reading is greater than 20 ohms, then valve is operating normally. Check for faulty ECM connector or faulty ECM. If light flashes continuously, then ECM and harness are working properly, replace power valve solenoid.