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INSPECTION PROCEDURE 8: Idle speed is high (improper idle speed). M11310100285USA0000010000 COMMENT ⦆ In such cases as the above, the cause is probably TROUBLESHOOTING HINTS (The most likely ⦆ Malfunction of the engine coolant temperature ⦆ Malfunction of the accelerator pedal position sensor ⦆ Malfunction of the accelerator pedal position sensor ⦆ Malfunction of the A/C switch signal. ⦆ Malfunction of the power steering pressure sensor ⦆ Malfunction of the purge control system. ⦆ Malfunction of the ECM.
DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: V.C.I. ⦆ MB991827: USB Cable ⦆ MB991910: Main Harness A STEP 1. Using scan tool MB991958, read the diagnostic ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool MB991958, always turn the (1) Connect scan tool MB991958 to the data link connector. (2) Turn the ignition switch to the "ON" position. (3) Read the DTC. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is any DTC set? YES: Refer to Diagnostic Trouble Code Chart P.13Ab-44. NO: Go to Step 2. STEP 2. Using scan tool MB991958, check data list. (1) Turn the ignition switch to the "ON" position. (2) Check the following item in the data list. Refer to Data List a Item 06: Engine Coolant Temperature Sensor. MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-779 SYMPTOM PROCEDURES |