Galant L4-2.4L (4G69) (2004)
1. Disconnect A/C-ECU connector C-10 <manual air conditioning system (low)> or C-15 <manual air conditioning system (middle) or automatic air
conditioning system>, and measure the resistance at the component side of A/C-ECU connector C-10 <manual air conditioning system (low)> or
C-15 <manual air conditioning system (middle) or automatic air conditioning system>.
2. Measure the resistance between A/C-ECU connector terminals 5 and 6 <manual air conditioning system (low)> or terminals 14 and 15 <manual air
conditioning system (middle) or automatic air conditioning system>.
OK: 1 kOhm or more
Q: Does the resistance measure 1 kOhm or more?
YES: If the resistance measures 1 kOhm or more, diagnose CAN bus lines thoroughly. Refer to "Diagnostic Item 15".
NO: If the resistance measures less than 1 kOhm, replace the A/C-ECU.
Part 2
STEP 16. Check the CAN_L and H lines (communication lines including the SRS-ECU) between joint connector (3) and the SRS-ECU for a
short circuit. Measure the resistance at joint connector (3) C-02.