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ENGINE CONTROL ENGINE AND EMISSION CONTROL 17-3 ENGINE CONTROL GENERAL INFORMATION M1171000100329 A cable-type accelerator mechanical SERVICE SPECIFICATIONS M1171000300099 TROUBLESHOOTING INTRODUCTION TO ENGINE CONTROL M1171002000287 If there is a malfunction in the engine control system, ENGINE CONTROL SYSTEM M1171002100314 Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you customer exists. 3. Find the malfunction by following the Symptom Chart. 4. Verify that the malfunction is eliminated. SYMPTOM CHART M1171002200322 SYMPTOM PROCEDURES INSPECTION PROCEDURE 1: Throttle Valve will not Fully Open or Close <4G63> DIAGNOSIS STEP 1. Check the accelerator cable adjustment. Q: Is the accelerator cable properly adjusted? YES : Go to Step 2 . NO : Adjust the accelerator cable (Refer to ). Then go to Step 3 . STEP 2. Check the throttle valve. Check that the throttle lever of the throttle body Q: Does the throttle lever of the throttle body assembly move smoothly? YES : Go to Step 3 . NO : Cleaning the throttle body (Refer to GROUP ), or replace the throttle body assembly (Refer to Then go to Step 3 . STEP 3. Retest the system. Q: Does the throttle valve fully open and close? YES : The procedure is complete. NO : Return to Step 1 . Items Standard value Accelerator cable play mm 1.0 − 2.0 Engine idle speed r/min 4G63 750 ± 50 4G69 700 ± 100 SYMPTOM INSPECTION PROCEDURE REFERENCE PAGE Throttle valve will not fully open or close <4G63> 1 Throttle valve will not fully open or close <4G69> 2 Accelerator pedal operation is not smooth (over 3 |