Pinout Values and Diagnostic Parameters

AIR CONDITIONING: AIR CONDITIONING SYSTEM: TERMINALS OF ECU

1. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the E32 and E33 connectors from the air conditioning amplifier assembly and inspect the connector on the wire harness side, as shown in the table below.





Standard:





If the results are not as specified, inspect the circuits connected to the other parts.

(b) Reconnect the E32 and E33 connectors to the air conditioning amplifier assembly and inspect the wire harness side connector from the back side, as shown in the table below.





Standard:









If the results are not as specified, replace the air conditioning amplifier assembly with a new one. If the results are still not as specified after replacing the air conditioning control assembly, inspect the circuits connected to other parts.

(1) WAVEFORM 1:





Magnet clutch signal





HINT
The wavelength becomes shorter as the engine rpm increases.

2. INSPECT ECM

(a) Connect the connector to the ECM and inspect the wire harness side connector from the back side, as shown in the table below.





Standard voltage:





If the result is not as specified, the ECM may have a malfunction.

(1) WAVEFORM 1:





Magnet clutch signal





HINT
The wavelength becomes shorter as the engine rpm increases.