EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5E-103
CLEANING
IMPORTANT: The main relay is an electrical component. Do NOT soak in any liquid
cleaner or solvent; damage may result.
1. Clean exterior with a dry cloth.
2. Clean terminals with a suitable cleaner.
INSPECTION
1. Look for evidence of any physical damage to base or connector surfaces of relay.
2. Visually inspect electrical pins of ECT for straightness and no corrosion.
3. Visually inspect connectors on the wiring harness for corrosion and for terminals that
may have backed out of the harness.
TESTING
NOTE: The relay numbers can be found on the bottom of the relay.
1. The following information applies to operations/tests of this relay:
• Terminal 30 is connected to battery voltage through a circuit breaker.
• Terminal 87 is connected (a circuit is formed) to terminal 30 in the energized (ON)
position. Terminal 87 then supplies battery voltage to two ECM pins.
• Terminal 86 is connected to terminal 30.
• Terminal 85 is grounded by the ECM, causing the relay to be energized.
INSTALLATION
1. Insert electrical connector onto main relay.
2. Attach relay to electrical box.
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