DESCRIPTION
When the ignition switch is turned to the ON position, the battery voltage is applied to terminal IGSW of the ECM. The ECM MREL output signal causes a current to flow to the coil, closing the contacts of the EFI relay and supplying power to terminal +B of the ECM.
If the ignition switch is turned off, the ECM holds the EFI relay ON for a maximum of 2 seconds to allow for the initial setting of the throttle valve.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT ECM (+B VOLTAGE)
Standard voltage
2 CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
Standard resistance: Check for open
3 INSPECT ECM (IGSW VOLTAGE)
Standard voltage
4 CHECK FUSE (IGN FUSE)
Standard resistance: Below 1 Ω
5 CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ECM)
Standard resistance: Check for open
Check for short
6 INSPECT IGNITION SWITCH ASSEMBLY
7 CHECK FUSE (AM2 FUSE)
Standard resistance: Below 1 Ω
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)
8 INSPECT ECM (MREL VOLTAGE)
Standard voltage
9 CHECK FUSE (EFI NO.1 FUSE)
Standard resistance: Below 1 Ω
10 INSPECT RELAY (EFI RELAY)
Standard resistance
11 CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM)
Standard resistance: Check for open
Check for short
12 CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM)
Standard resistance: Check for open
Check for short
13 CHECK HARNESS AND CONNECTOR (EFI RELAY - BODY GROUND)
Standard resistance : Check for open
REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI RELAY - BATTERY)
Adjustment procedure
Hold the steering wheel and
push the lever down.
Adjust to the ideal position by
moving the steering wheel horizontally
and vertically.
After adjustment, pull the lever up
to secure the steering wheel.
...
Fail-safe chart
1. FAIL-SAFE FUNCTION
When communication fails in any of the main wires
(communication lines) due to a short circuit or other
causes, the fail-safe function, which is specified for
each system, operates to prevent the system from
malfunctioning.
The table below shows the effects on eac ...
Removal
1. REMOVE REAR DOOR WINDOW FRAME MOULDING
Remove the screw.
Using a heat light, heat the rear door window frame
moulding between 40 to 60 C (104 to 140 F).
NOTICE:
Do not heat the rear door window frame
moulding excessively.
Slide the rear door window frame moulding upward
to r ...