Circuit Test SCG - Solenoid Controlled By Ground: Notes

Fig 1: Solenoid Connector Terminal ID

NOTE: Enter this test only when Code 25, 26, 28, 29, 34, 41 or 42 is displayed during self-test procedures (KOEO or KOER). This test is intended to diagnose the following solenoids and circuits: Canister Purge (CANP), EGR Control (EGRC), EGR Vent (EGRV), Fuel Pressure Regulator Control (PRC), High Inlet Air Control (HSIA), Idle Speed Control (ISC) and Turbo Boost Solenoid (BOOST).

CIRCUIT PIN IDENTIFICATION (SCG)

Circuit	Breakout Box Pin No.	ECA Pin	Wire Color
1.8L
CANP	31	2X	White/Blue
HSIA	53	2S	Black/Red
ISC	41	2W	Blue/Orange
PRC	11	2T	Green/Orange
2.2L Non-Turbo
A/T
CANP	31	2O	White/Black
ISC	41	3Q	White
PRC	21	3M	White/Red
M/T
CANP	31	2X	White/Black
ISC	41	2W	White
PRC	11	2T	White/Red
2.2L Turbo
BOOST	35	3R	Brown/Yellow
CANP	31	2O	White/Black
EGRC	52	3P	White/Blue
EGRV	33	3O	Blue/White
ISC	41	3Q	White
PRC	21	3M	White/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) Solenoid Function Install breakout box, leaving ECA disconnected. Check function of appropriate solenoid. See SWITCH PERFORMANCE CHECK. If solenoid functions okay, test is complete. If solenoid does not function properly, go to next step.

3) Remove connector, and turn ignition on. Measure voltage between connector VPWR terminal and ground. If voltage is less than 10 volts, repair VPWR circuit. If voltage is more than 10 volts, go to next step.

4) Measure voltage between connector VPWR and SIG terminals. Simulate ECA solenoid activation. See SIMULATED ECA SOLENOID ACTIVATION. If voltage is more than 10 volts only when solenoid is activated, replace solenoid. If voltage is not more than 10 volts when solenoid is activated, go to next step.

5) Disconnect solenoid connector. Check for continuity between breakout box SIG test pin and solenoid SIG terminal. If continuity does not exist, repair SIG circuit between solenoid and ECA. If continuity exists, go to next step.

6) Check continuity between breakout box SIG test pin and all other test pins. If resistance between SIG test pin and any other test pin is less than 5 ohms (continuity), repair shorted SIG wire to ECA as necessary. If resistance is greater than 5 ohms (no continuity) in all circuits and no other problem or code is found, replace ECA.