Frontier & Xterra

If CONSULT-II is available, go to next step. If CONSULT-II is not available, go to step 3.

Using CONSULT-II in DATA MONITOR mode, observe PW/ST SIGNAL in specified conditions. See CHECKING POWER STEERING SWITCH FUNCTION (FRONTIER & XTERRA) table. If PW/ST SIGNAL is as specified, go to step 6. If signal is not as specified, go to step 4.

CHECKING POWER STEERING SWITCH FUNCTION (FRONTIER & XTERRA)

Condition	PW/ST Signal
Steering In Neutral Position	OFF
Steering Wheel Turned	ON

Start engine. Backprobing at ECM, measure voltage between ground and ECM terminal No. 39 (Gray/Red wire). See Figure and Figure . When steering wheel is being turned quickly, voltage should be about zero volts. When steering wheel is not being turned quickly, voltage should be about 5 volts. If voltage is as specified, go to step 6. If voltage is not as specified, go to next step.
Disconnect ECM 124-pin harness connector. For ECM location, see Figure. Check continuity of Gray/Red wire between power steering pressure switch harness connector terminal No. 1 and ECM harness connector terminal No. 39. See Figure. Continuity should exist. Also, check for open or short in Gray/Red wire between power steering pressure switch and ECM. If problem is found, repair as necessary. After repair, retest system. If no problem is found, go to next step.
Check power steering pressure switch. See POWER STEERING PRESSURE SWITCH . If problem is found, repair as necessary. After repair, retest system.
No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.