Post by
loystock »
https://forums.nicoclub.com/loystock-u10145.html
Thu Dec 03, 2009 7:35 pm
Most of the time, replacing the ABS Relay Unit (mounted on ABS Actuator, pax side) will fix the problem, but NOT GUARANTEED. The actual part name is RELAY ASSY-ACTU with P/N: 47605-4P00. It is a black assembly with 3 electrical receptacles. It's @ $30 from an Infiniti dealership.
I know you have a 97Q but you have to use the 98Q FSM since the 97Q FSM has limited chapters available.
As I have mentioned above, the ABS Relay Unit could be the problem but the lights can also be triggered by faulty wheel sensors, solenoid valves, etc. So it would be better to use the built-in diagnostic first so you don't waste your money changing parts unnecessarily. The diagnostic procedure is not difficult to follow.
Go to BR (Brake System) chapter of the FSM and then to page BR-47 to familiarize with the component location, including the ABS Actuator location and Data Link Connector. You need to connect Pin 4 of the Data Link Connector (do not confuse this with the 16-pin OBD II receptacle) to chassis GROUND to initiate the built-in diagnostic.
Go to pages BR 43-45 and look at the SYMPTOMS list. If you are familiar with electrical/electronics circuit, you can refer to pages BR 48-58 and look at the wiring diagram to get a better understanding of the ABS/TCS components interconnection.
For the actual diagnostic, go to page BR-59 and follow the procedure to get the malfunction code. Page BR-60 explains how to read the diagnostic code while page BR-61 correlates the fault codes with the affected components.
I hope it's just the ABS Relay Unit. The other components may be expensive.
Good Luck