STEP 1. Check A/C control panel connector C-210 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 2. Measure the voltage at A/C control panel connector C-216.
(1) Disconnect A/C control panel connector C-216 and measure the voltage at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 20 and ground.- The measured value should be approximately 12 volts (battery positive voltage).
Is the measured voltage approximately 12 volts?
Go to Step 5. Go to Step 3.
STEP 3. Check ETACS-ECU connector C-417 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 4. Check the wiring harness between A/C control panel connector C-216 (terminal 20) and ETACS-ECU connector C-417 (terminal 5).
STEP 5. Measure the voltage at A/C control panel connector C-216.
STEP 6. Check the wiring harness between A/C control panel connector C-216 (terminal 10) and the fusible link (36).
STEP 7. Measure the resistance at A/C control panel connector C-216.
(1) Disconnect A/C control panel connector C-216, and measure at the wiring harness side.
(2) Measure the resistance between terminal 9 and ground.- The measured value should be 2 ohms or less.
Does the measured resistance value correspond with this range?
Replace the A/C control panel, and check that the A/C works normally. Go to Step 8.
STEP 8. Check grounding connector C-01 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 9. Check the wiring harness between A/C control panel connector C-216 (terminal 9) and grounding connector C-01 (terminal 6).