Operation CHARM: Car repair manuals for everyone.

Service Hints

E5 (A), (D), E6 - (B), E7 - (C), (F) - ECM (ENGINE CONTROL MODULE)
BATT - E1: 9.0 - 14.0 Volts (Always)
+B - E1: 9.0 - 14.0 Volts (Ignition SW at ON position)
IDL - E2: 9.0 - 14.0 Volts (Ignition SW ON and throttle valve open)
VTA - E2: 0.3 - 0.8 Volts (Ignition SW ON and throttle valve fully Closed)
3.2 - 4.9 Volts (Ignition SW ON and throttle valve open)
PIM - E2: 3.3 - 3.9 Volts Ignition SW at ON position)
VC - E2: 4.5 - 5.5 Volts (Ignition SW at ON position)
THA - E2: 0.5 - 3.4 Volts (Ignition SW ON and intake air temp. 20°C, 68°F)
SPD - E2: 4.5 - 5.5 Volts (Ignition SW AT ON Position)
THW - E2: 0.2 - 1.0 Volts (Ignition SW ON and coolant temp. 80°C (76°F)
STA - E1: 6.0 - 14.0 Volts (Engine cranking)
IGT - E1: 0.8 - 1.2 Volts (Engine cranking or idling)
TE1 - E1: 9.0 - 14.0 Volts (Ignition SW ON and data link connector 1 (DLC1) TE1 - E1 not connected)
0 - 3.0 Volts (Ignition SW ON and data link connector 1 (DLC1) TE1 - E1 connected)
W - E1: 9.0 - 14.0 Volts (no trouble and Engine running)
AC1 - E1: 0 - 3.0 Volts (Ignition SW ON and Air Conditioning ON)
ACT - E1: 4.5 - 5.5 Volts (Ignition SW ON and Air Conditioning ON)
NSW - E1: 0 - 3.0 Volts (Ignition SW ON and park/neutral position SW (neutral start SW) at P or N position)
9.0 - 14.0 Volts (Ignition SW ON and park/neutral position SW (neutral start SW) at except P and N position)
B/K - E1: 9.0 - 14.0 Volts (brake pedal depress)
#10, #20 - E01, E02: 9.0 - 14.0 Volts (Ignition SW at ON position)
#1, #2, #3, #4 - E01, E02: 9.0 - 14.0 Volts Ignition SW at ON position) (California)

RESISTANCE OF ECM WIRING CONNECTORS
IDL - E2: Infinity (Throttle valve open)
2.3 K Ohms or less (Throttle valve fully Closed)
VTA - E2: 3.3 - 10.0 K Ohms (Throttle valve fully open)
0.2 - 0.8 K Ohms (Throttle valve fully Closed)
VC - E2: 3.0 - 7.0 K Ohms
THA - E2: 2.0 - 3.0 K Ohms (Intake Air Temp. 20°C, 68°F)
THW - E1: 0.2 - 0.4 K Ohms (Coolant Temp. 80°C (176°F)
G1 - G-: 0.17 - 0.21 K Ohms
RSC, RSO - +B: 19.3 - 22.3 Ohms

C5 - CIRCUIT OPENING RELAY
1 - 2: Closed with the starter cranking and Engine running

EFI MAIN RELAY (in R/B 2)
3 - 5: Closed with the Ignition SW at ON or ST position

E4 - ENGINE COOLANT TEMP. SENSOR
1 - 2: 10.0 - 20.0 K Ohms (-20°C, -4°F)
4.0 - 7.0 K Ohms ( 0°C, 32°F)
2.0 - 3.0 K Ohms (20°C, 68°F)
0.9 - 1.3 K Ohms (40°C, 104°F)
0.4 - 0.7 K Ohms (60°C, 140°F)
0.2 - 0.4 K Ohms (80°C, 176°F)

I6, I7, I8, I9 - INJECTORS
1 - 2: Approx. 13.8 Ohms

T1 - THROTTLE POSITION SENSOR
3 - 1: 0.2 - 5.7 K Ohms with clearance between lever and the stop screw 0 mm (0 in.)
2 - 1: Less than 2.3 K Ohms with clearance between the lever and the stop screw 0.5 mm (0.02 in.) with clearance between lever and the stop screw 0.7 mm (0.028 in.)
3 - 1: 3.5 - 10.3 K Ohms with the throttle valve fully open