Circuit Test STG - Switch To Ground: Notes

Fig 1: Switch Circuits & Connector Terminal ID

NOTE: Enter this test only when directed here by SWITCH MONITOR TEST. This test is intended to diagnose the following switches and circuits: A/C Switch (ACS), Blower Motor Switch (BLMT), Clutch Engage Switch/Neutral Gear Switch (CES/NGS), Idle Switch (IDL), Power Steering Pressure Switch (PSPS) and Wide Open Throttle Switch (WOT).

CIRCUIT PIN IDENTIFICATION (STG)

Circuit	Breakout Box Pin No.	ECA Pin	Wire Color
1.8L
ACS	10	1Q	Green/Black
BLMT	23	1S	Orange/Blue
CES/NGS	43	1V	Brown/Yellow
IDL	18	1N	Red/White
PSPS	19	1P	Blue/Yellow
WOT	27	2L	Green/White
2.2L Non-Turbo
BLMT
A/T	22	1P	Blue/Black
M/T	23	1S	Blue/Black
CES/NGS	43	1V	Red/Blue
IDL
A/T	18	1T	Green/White
M/T	18	1N	Green/White
PSPS
A/T	19	1N	Brown/Red
M/T	19	1P	Brown/Red
2.2L Turbo
BLMT	22	1P	Blue/Black
CES/NGS	43	1R	Red/Blue
IDL	18	1T	Green/White
PSPS	19	1N	Brown/Red

1) Checking System Integrity Visually check all wiring, connectors and components for damage, shorting or looseness. If a fault is found, repair as necessary. If no fault is found, go to next step.

2) Checking Switch Signal Install breakout box, leaving ECA disconnected. Turn ignition off. Measure resistance between component being tested and ground. See CIRCUIT PIN IDENTIFICATION (STG) . Check component resistance with switch in ON and OFF positions. See SWITCH PERFORMANCE CHECK.

3) Resistance should switch from 0-5 ohms (switch closed) to greater than 10,000 ohms (switch open). If resistance is as specified, go to step 6). If resistance is not as specified, disconnect switch. Ensure ignition is off. On all except 2-pin switches, measure component resistance between ground and switch terminal to ECA, with switch in ON and OFF positions. Go to next step.

4) On 2-pin switches, measure resistance between component terminals with switch in ON and OFF positions. On all switches, resistance should switch from 0-5 ohms (switch closed) to greater than 10,000 ohms (switch open). If resistance is as specified, go to next step. If resistance is not as specified, replace switch.

5) Circuit Check Ensure ignition is off and switch is disconnected. Measure resistance between test pin of component breakout box and test pins No. 26, 37, 57 and 60. If each resistance is greater than 10,000 ohms, go to next step. If resistance is not as specified, repair circuit(s).

6) Measure resistance between test pin of component breakout box and switch connector. If resistance is less than 5 ohms and no other problem or code is found, replace ECA. If resistance is more than 5 ohms, repair circuit.