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1A-52 Engine Control System
Step
Check the CHECK ENGINE lamp bulb.
1.
Remove the CHECK ENGINE lamp bulb.
12
2.
Check the bulb is broken.
Is the bulb in normal condition?
Replace the bulb.
13
Is the action complete?
Check the power is supplied to the starter
switch.
1.
Disconnect the starter switch connector.
2.
Measure the voltage between starter
14
switch connector pin (vehicle side) and
ground (e.g., frame or body).
Was the voltage within range?
Repair or replace the harness between SBF
(key switch: 50 A) and starter switch.
15
Is the action complete?
Check the starter switch.
1.
Remove the starter switch.
2.
Starter switch "ON".
16
3.
Check the continuity between starter
switch pins.
Is the starter switch in normal condition?
Replace the starter switch.
17
Is the action complete?
Repair or replace the harness between starter
switch and fuse (meter back: 15 A).
18
Is the action complete?
Check the circuit between ECM and CHECK
ENGINE lamp for open wiring.
1.
Disconnect the meter connector A.
2.
Disconnect the ECM.
19
3.
Check the continuity between meter and
ECM connectors pins.
Is the circuit in normal condition?
Repair or replace the harness between ECM
and CHECK ENGINE lamp.
20
Is the action complete?
Re-observe the CHECK ENGINE lamp for
operation.
1.
Certainly install necessary components
such as connectors, fuses, and relays.
21
2.
Starter switch "ON", and observe the
CHECK ENGINE lamp.
Is the CHECK ENGINE lamp "ON"?
Action
Value(s)
—
Go to Step 14
Verify repair and
—
go to Step 23
Pin 2-ground:
16-32 V
Go to Step 16
—
Verify repair and
go to Step 23
Pins 2-3:
Continued
Go to Step 18
Verify repair and
—
go to Step 23
—
Verify repair and
go to Step 23
Pins A5-99:
Continued
(Meter) -
(ECM).
Go to Step 21
—
Verify repair and
go to Step 23
—
Refer to
"Diagnostic Aids"
Yes
No
Go to Step 13
Go to Step 15
Go to Step 17
Go to Step 20
Go to Step 22
—
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