1B-4 AIR CONDITIONING (OPTIONAL)
Terminal Arrangement of ECM Coupler (viewed from Harness Side)
ECM Voltage Values Table for Relation of A/C Control (M13 Engine Model)
b. To “HEATER” fuse (25A) in circuit fuse box 2. Dual pressure switch 7. A/C evaporator thermistor 12. Radiator (and condenser) cooling
fan motor relay
c. To “IG COIL” fuse (15A) in circuit fuse box 3. Blower fan motor relay 8. ECT sensor 13. Radiator (and condenser) cooling
fan motor
d. To “FI” fuse (20A) in main fuse box 4. Blower fan motor 9. Compressor relay 14. ECM
e. To “RDTR” fuse (30A) in main fuse box 5. Blower fan motor resistor 10. Compressor
Termi-
nal
Wire Circuit Measurement
ground
Normal value Condition
E22-01 BLK Main ground
for ECM
Ground to
body (Fig A)
–0.3 – 0.3 V Ignition switch ON
E21-05 BLK/
RED
Power supply
for engine con-
trol
Ground to
engine (Fig B)
10 – 14 V Ignition switch ON
E23-01 BLK/
YEL
ECM ground
for power cir-
cuit
Ground to
body (Fig A)
–0.3 – 0.3 V Ignition switch ON
E21-06 BLK/
RED
Power supply
for engine con-
trol
Ground to
engine (Fig B)
10 – 14 V Ignition switch ON
E21-4 BLU Radiator
(condenser)
cooling fan
relay output
Ground to
engine (Fig B)
0 – 1 V A/C switch ON or engine coolant
temp. sensor more than 96 ºC
(205
ºF) with engine running
10 – 14 V Except the above-mentioned with
engine running
E23-15 BLU/
BLK
Main relay Ground to
engine (Fig B)
0 – 1 V Ignition switch ON
10 – 14 V Ignition switch OFF
E23-11 ORN Compressor
magnet clutch
relay output
Ground to
engine (Fig B)
0 – 1 V A/C switch ON with engine running
10 – 14 V Except the above-mentioned with
engine running
E23-02 BLK/
YEL
ECM ground
for power cir-
cuit
Ground to
body (Fig A)
–0.3 – 0.3 V Ignition switch ON
E21-15 GRN/
RED
Evaporator
thermistor
temp.
input
Ground to
engine (Fig B)
2.0 – 2.3 V
(1800 – 2200
Ω
)
Evaporator thermistor temp. at
Approx. 25 ºC (77 ºF) with
ignition
switch ON
3.5 – 3.6 V
(6300 – 7000
Ω
)
Evaporator thermistor temp. at
Approx. 0 ºC (32 ºF) with ignition
switch ON
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