Things To Remember

Note the test readings, use common sense when assessing the results of the tests.
The specified values are with the ignition in the ON position unless otherwise stated.
First, make sure the control module is supplied with power and grounded.
Then, check all the sensor inputs and signals from other systems.
Finally, check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.
If any of the test readings is incorrect, use the wiring diagram to determine which lead, connector or component should be checked further.
The specified test values apply for a Fluke 88/97.
The test readings % (+) and ms (+) signify the pulse ratio and pulse length of the signal respectively. A test instrument capable of measuring pulse ratio and pulse width must be used. The sign indicates a positive trigger pulse, TRIG+.

> = greater than; < = less than; ~ = alternating current.

Pins without further comments have no connection. (LP: LOGIC PROBE P = select pulse; p = visible pulses).

TEST READINGS, CONTROL MODULE CONNECTIONS

Pin	Cable Color	Component/Function	In/Out	Test Conditions	Across	Test Reading
1	RD/WH	Main Relay, 87	In	-	B+ to 1	<0.5 V
2	YE	Oxygen Sensor 2, Pre-Heating	Out	Idling Coolant Temperature Above 50C	2-25	Approx. 0.3 V
3	-	Not connected	-	-	-	-
4	RD/WH	Relay. A/C Compressor	Out	Idling A/C On	4-25	<0.5 V
5	GY/GN	Cruise Control B	In	Position ON/OFF	5-25	0 V B+
6	BN/RD	Combustion Cyl. 3+4	In	Idling	6-25	15-90 Hz (LP LO HIp)
7	OG/BK	Trigger 1	Out	Idling	7-25	7 Hz 14 ms (-) (LP HI LOp)
8	GY/RD	Trigger 4	Out	Idling	8-25	7 Hz 14 ms (-) (LP HI LOp)
9	YE/BU	Pedal position sensor 2	In	Pedal Released / Pedal Fully Depressed	Use diagnostic tool	0.355 - 1.010 V / 3.945 - 4.600 V
10	BU/BN	Throttle Position Sensor 2	In	Throttle Closed / Throttle Fully Open	10-70	3.910 - 4.935 V / 0.025 - 1.070 V
11	BY/YE	Manifold Absolute Pressure Sensor	In	.....	11-22	2.1 V at 100 kPa
12	.....	Not Connected	.....	.....	.....	.....
13	BU	Charge Air Control Valve	Out	.....	13-25	32 Hz 2% (-) 0.5 ms (-) (LP HI LOp)
14	.....	Not Connected	.....	.....	.....	.....
15	WH/BK	Intake Air Temperature	In	.....	15-22	Approx. 2.4 V At 20 C
16	.....	Not Connected	.....	.....	.....	.....
17	YE	Crankshaft Position Sensor	In	Idling / Starter Motor Cranking	17-18	5-15 V~ Approx. 800 Hz LP HI LO >2.0 V~
18	BK	Crankshaft Position Sensor	In	Idling / Starter Motor Cranking	17-18	5-10 V~ Approx. 800 Hz LP HI LO >2.0 V~
19	WH	P-Bus -	In/Out	.....	19-25	2-3 V (LP PHI LO)
20	.....	Not Connected	.....	.....	.....	.....
21	.....	Not Connected	.....	.....	.....	.....
22	BK	Sensor Ground	Out	.....	22-25	2-3 V (LP PHI LO)
23	PK/WH	+30	In	.....	B+ to 23	<0.5
24	OG/GN	Throttle Motor -	Out	.....	48-24	600 Hz LP HI LO
25	BK	Power Ground	In	.....	25- B-	<0.1 V
26	BU/GY	Main Relay	Out	10s After Ignition Off	26-25	<0.5 V B+
27	YE/GY	EVAP Canister Purge Valve	Out	Idling, Warm Engine And Valve Active	27-25	16 Hz (LP HI LOp)
28	.....	Not Connected	.....	.....	.....	.....
29	YE/GN	Pedal Switch, Brake/Clutch	In	Automatic Position D / Brake Or Clutch Pedal Depressed	29-25	B+ 0 V
30	GY	Cruise Control C	In	Position ON/OFF	30-25	0 V B+
31	.....	Not Connected	.....	.....	.....	.....
32	.....	Not Connected	.....	.....	.....	.....
33	GN/WH	Throttle Position Sensor 1	In	Throttle Closed / Throttle Fully Open	33-70	0.065-1.090 V / 3.930-4.775 V
34	GN	Oxygen Sensor 1	In	Idling, Warm Engine, Closed Loop Active	34-58	0-1 V
35	BU/WH	Charge Air Absolute Pressure Sensor	In	.....	35-70	2.1 V (100 kPa)
36	BU/GN	Relay, Limp-Home Solenoid	Out	.....	36-25	B+
37	GN	EVAP Close Valve	Out	Activate ON	37-25	B+ <0.5 V
38	OG	Knock Signal	In	.....	38-25	2.5 V
39	YE/WH	Temperature Sensor, Engine Coolant	In	.....	39-22	1.0 V (90C)
40	.....	Not connected	.....	.....	.....	.....
41	.....	Not connected	.....	.....	.....	.....
42	.....	Not connected	.....	.....	.....	.....
43	YE/GY	+15	In	Ignition OFF	43-25	B+ <0.5 V
44	GN/WH	Injector 2	Out	Idling	44-25	7 Hz 2.5-4.5 ms (-) (LP HI LOp)
45	GN/BK	Injector 1	Out	Idling	45-25	7 Hz 2.5-4.5 ms (-) (LP HI LOp)
46	GY	5 V	Out	.....	46-70	5 V
47	BK	Power Ground	In	.....	47-B-	<0.1 V
48	RD/BU	Throttle Motor +	Out	.....	48-24	600 Hz LP HI LO
49	BK/WH	Oxygen Sensor 1, Pre-Heating	Out	Idling	49-25	Approx. 0.3 V
50	WH	Fuel Pump Relay	Out	Starter Motor Cranking	50-25	B+ <0.5 V
51	GN/BU	Control Valve, Bypass	Out	Rev Up Engine And Release Accelerator Pedal / Acceleration Under Load	51-25	B+ <0.5 V
52	GN	Cruise Control A	In	Position ON/OFF	52-25	0 V B+
53	YE/BN	Combustion Cyl. 1+2	In	Idling	53-25	15-90 Hz (LP LO HIp)
54	GN/YE	Trigger 2	Out	Idling	54-25	7 Hz 14 ms (-) (LP HI LOp)
55	BU/RD	Trigger 3	Out	Idling	55-25	7 Hz 14 ms (-) (LP HI LOp)
56	YE/GN	Pedal Position Sensor 1	In	Pedal Released / Pedal Fully Depressed	56-70	3.990-4.645 V / 0.400-1.055 V
57	GN	Oxygen Sensor 2	In	Idling, Warm Engine, Closed Loop Active	57-58	0-1 V
58	GY	Reference Ground, Oxygen Sensor	In	.....	58-25	<0.1 V
59	BU	Tank Pressure Sensor, EVAP	In	Filler Cap Released And Fuel Level Below Sensor	59-22	2.5 V
60	.....	Not Connected	.....	.....	.....	.....
61	.....	Not Connected	.....	.....	.....	.....
62	BK	Power Ground	.....	.....	62-B-	<0.1 V
63	VT	Brake Lights	In	Brake Pedal Depressed	63-25	0 V B+
64	PK/BK	Vehicle Speed	In	Rotate Front Left Wheel 1/2 rps	64-25	15 Hz 50% (LP HIp LOp)
65	GY/BU	Mass Air Flow Sensor	In	Idling, Engine Warm, A/C Off, Electric Consumers Off	65-25	Approx. 2.1 kHz
66	WH	P-Bus +	In/Out	.....	66-25	2-3 V (LP PHI LO)
67	VT/WH	Injector 3	Out	Idling	67-25	7 Hz 2.5-4.5 ms (-) (LP HI LOp)
68	GY/WH	Injector 4	Out	Idling	68-25	7 Hz 2.5-4.5 ms (-) (LP HI LOp)
69	WH/BK	5 V	Out	.....	69-22	5 V
70	BK	Sensor Ground	Out	.....	70-25	<0.1 V