DTC | P1620 | A/C Relay Short |
P1621 | A/C Relay Open |
With the A/C switch ON, the Engine Control Module (ECM) will ground the coil of the A/C compressor relay(A) after a short delay to adjust idle speed. Then the A/C compressor runs.
DTC No | Detecting Condition & Limp Home | Suspected area |
P1620 P1621 | Detecting Condition P1620: Short circuit to power supply line. P1621: Breaking of wire or short to ground Enable Condition Ignition switch : ON Limp Home None | - Open or short in A/C relay circuit - A/C relay - ECM |
Proceed with ECM problem procedure. |
