Operation CHARM: Car repair manuals for everyone.

1B Output Circuits of Logic Module


1. Connect diagnostic read-out tool to engine test connector.
2. Put system into ATM test mode.
3. Enter Test Code 04 and observe radiator fan operation:
a. If radiator fan cycles on and off every two seconds, proceed to step 5 on models less A/C or step 4 on models with A/C.
b. If radiator fan does not run but relay is clicking, check radiator fan motor circuit and repair as necessary.
c. If radiator fan does run and relay does not click, replace the relay.
4. Enter Test Code 05, then press A/C button on and listen for operation of A/C cutout relay:
a. If relay is clicking, proceed to step 5.
b. If A/C relay does not click, replace the relay.
5. Enter Test Code 07 and listen for operation of canister purge solenoid:
a. If relay is heard clicking, proceed to Test 1 Step C.
b. If relay does not click, replace the relay.