6E1-40
ENGINE AND EMISSION CONTROL SYSTEM
B-8 A/C CONTROL SIGNAL CHECK (IF EQUIPPED)
1. Battery
2. Main fuse box
3. Ignition switch
4. “HEATER” fuse
5. Blower fan motor
6. Blower fan switch
7. A/C switch
8. Dual pressure switch
9. A/C evaporator thermistor
10. A/C compressor
11. ECM
12. A/C compressor control relay
STEP
ACTION
YES
NO
1
1) Check voltage at “E34-19” terminal under each
condition given in table below.
2) Is check result satisfactory?
Ignition switch ON
A/C switch OFF
Blower fan switch OFF
Ignition switch ON
A/C switch ON
Blower fan switch ON
10 – 14 V
2 V or less
A/C control signal is
in good condition.
“G/B” wire open or short
Poor “E34-19” terminal
connection
If wire and connection are
OK, check dual pressure
switch and A/C switch re-
ferring to Section 1B.
Fig. for STEP 1
1. ECM coupler connected
2. Body ground
