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STEP 3. Check A/C pressure sensor connector A-50 and A/ Q:Are air A/C pressure sensor connector A-50 and A/C-ECU connector C-109 in good condition? YES: Go to Step 4. NO: Repair or replace the connector. Refer to GROUP 00E, Harness Connector Inspection P.00E-2. STEP 4. Check the wiring harness between A/C-ECU Q:Is the wiring harness between A/C-ECU connector C-109 (terminals 20, 16 and 19) and A/C pressure sensor connector A-50 (terminals 3, 2 and 1) in good condition? YES: Go to Step 5. NO: Repair the wiring harness. STEP 5. Check the A/C pressure sensor operation. (1) Assemble a gauge manifold on the high pressure service ZC6035740000 A/C pressure sensor AC603575 Harness side A/C MB991658 0000 (2) Disconnect the A/C pressure sensor connector and connect (3) Turn ON the engine and then turn ON the A/C switch. ZC6035760000 Refrigerant pressure MPa (psi) Output voltage (V) 0 1 2 3 5 4 1 (145) 2 (290) 3 (435) (4) At this time, check to see that the voltage of A/C pressure NOTE: The allowance shall be defined as ±5%. Q:Is the A/C pressure sensor operating properly? YES: Go to Step 6. NO: Replace the A/C pressure sensor. Then go to Step 7. AIR CONDITIONING 55A-31 MANUAL A/C DIAGNOSIS |