Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Infiniti QX4FACTORY OEM SERVICE PROCEDURE
Shift Lock Control Unit (Except Q45)
Using voltmeter, backprobe Shift Lock Control Unit (SLCU) connector. Measure voltage between each terminal and terminal No. 7 (1997 200SX - 2.0L), 8 (J30) or X (Q45). See appropriate SHIFT LOCK CONTROL UNIT PIN VOLTAGE table.
SHIFT LOCK CONTROL UNIT PIN VOLTAGE (1997 200SX - 2.0L)
| Terminal No. | Item | Condition | Voltage |
|---|---|---|---|
| 1 | Ignition Signal | Key ON | Battery |
| 1 | Ignition Signal | EXCEPT ON | 0 Volts |
| 6 | Power Source | Any Condition | Battery |
| 4 | Shift Lock Signal | Ignition ON | Battery |
| 4 | Shift Lock Signal | Brake Depressed | Battery |
| 4 | Shift Lock Signal | Any Other Position | 0 Volts |
| 8 | Stop Light Switch | Brake Depressed | Battery |
| 8 | Stop Light Switch | Brake Released | 0 Volts |
| 5 | Park Position Switch | Key In Cylinder, Selector In P | Battery |
| 5 | Park Position Switch | Key In, Selector In Any Position Button Pushed | Battery |
| 5 | Park Position Switch | Except As Above | 0 Volts |
SHIFT LOCK CONTROL UNIT PIN VOLTAGE (J30)
| Terminal No. | Item | Condition | Voltage |
|---|---|---|---|
| 1 | Ignition Signal | Key ON | Battery |
| 1 | Ignition Signal | EXCEPT ON | 0 Volts |
| 2 | Power Source | Any Condition | Battery |
| 4 | Shift Lock Signal | Ignition ON | Battery |
| 4 | Shift Lock Signal | Brake Depressed | Battery |
| 4 | Shift Lock Signal | Any Other Position | 0 Volts |
| 5 | Stop Light Switch | Brake Depressed | Battery |
| 5 | Stop Light Switch | Brake Released | 0 Volts |
| 6 | Park Position Switch | Key In Cylinder, Selector In P | Battery |
| 6 | Park Position Switch | Key In, Selector In Any Position Button Pushed | Battery |
| 6 | Park Position Switch | Except As Above | 0 Volts |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.