ZR-1 Net Registry Forums - View Single Post

QB93Z · 10-09-2017

Please verify your readings from yesterday evening. Check for 12 vdc on the yellow wire that goes to the two wire connector in the top photo. The connector has two wires, yellow with a black stripe and purple. With the key in START, there should be 12 vdc on the yellow wire.

If you still get no voltage at the yellow wire, then the problem is in the Starter Enable Relay circuit or the Ignition Switch itself.

I think that the "other wire" with orange/white wire is for the under dash light so it should have 12 vdc when a door is open.

The Starter Enable Relay is turned on by the Central Control Module (CCM). The CCM gets a signal from the VATS Module and from the Theft Deterrent System.

These components are interconnected. The service manual says:

page 6E3-A-68: If the CCM does not send the correct VATS/TDS signal to the ECM, the ECM will not pulse the injectors and the car will not start

page 9D-2: The Starter Interrupt Relay: If VATS is not satisfied, the CCM will Reset (not allow start) for 2-4 minutes (crank and fuel disabled) and will not permit starting.

This is why the car will crank if you use the purple wire jumper, but it won't continue to run because the ECM and CCM are blocking the signal to the Fuel Enable Relay.

10-09-2017	#18
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,684	Re: Buzzing noises from glove box Please verify your readings from yesterday evening. Check for 12 vdc on the yellow wire that goes to the two wire connector in the top photo. The connector has two wires, yellow with a black stripe and purple. With the key in START, there should be 12 vdc on the yellow wire. If you still get no voltage at the yellow wire, then the problem is in the Starter Enable Relay circuit or the Ignition Switch itself. I think that the "other wire" with orange/white wire is for the under dash light so it should have 12 vdc when a door is open. The Starter Enable Relay is turned on by the Central Control Module (CCM). The CCM gets a signal from the VATS Module and from the Theft Deterrent System. These components are interconnected. The service manual says: page 6E3-A-68: If the CCM does not send the correct VATS/TDS signal to the ECM, the ECM will not pulse the injectors and the car will not start page 9D-2: The Starter Interrupt Relay: If VATS is not satisfied, the CCM will Reset (not allow start) for 2-4 minutes (crank and fuel disabled) and will not permit starting. This is why the car will crank if you use the purple wire jumper, but it won't continue to run because the ECM and CCM are blocking the signal to the Fuel Enable Relay. Last edited by QB93Z; 10-09-2017 at 07:43 PM.