Malfunction Indicator Lamp Remains On After Engine Starts; Dtc Check; Can Communication Line Circuit Check - Suzuki GRAND VITARA JB416 Service Manual

Step
8 Combination meter circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between "G28-15" terminal of
combination meter connector and vehicle body ground.
Ω
Is resistance 1 or less?

Malfunction Indicator Lamp Remains ON after Engine Starts

Wiring Diagram
Refer to "Malfunction Indicator Lamp Does Not Come ON with Ignition Switch ON and Engine Stop (but Engine Can
Be Started): ".
Circuit Description
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then, ECM
being supplied with the main power, transmits indication ON signal of malfunction indicator lamp (MIL) to combination
meter in order to turn MIL ON. And then, combination meter turns MIL ON. When the engine starts to run and no
malfunction is detected in the system, ECM transmits MIL indication OFF signal to combination meter in order to turn
MIL OFF. And then, combination meter turns MIL OFF, but if a malfunction was or is detected, MIL remains ON even
when the engine is running.
Troubleshooting
NOTE
• Before performed troubleshooting, be sure to read the "Precautions of ECM Circuit Inspection: in
related manual".
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to "Inspection of ECM and Its Circuits: ".
Step
1

DTC check

1) Start engine and recheck DTC of ECM and TCM (for A/T
model) while engine running.
Is there any DTC(s)?
2

CAN communication line circuit check

1) Check CAN communication line circuit between
combination meter and ECM, TCM (for A/T model), ABS
/ ESP® control module, 4WD control module (if
equipped), keyless start control module (if equipped)
referring to Step 9 to 15 "DTC P1674: CAN
Communication (Bus Off Error): ".
Is circuit in good condition?
Action
Action
Engine General Information and Diagnosis:
Yes
Substitute a known-
good combination meter
and recheck. If MIL still
remains OFF, substitute
a known-good ECM and
recheck.
Yes
Go to Step 2 of "Engine
and Emission Control
System Check: in
related manual", Step 2
of "A/T System Check:
in Section 5A in related
manual".
Substitute a known-
good combination meter
and recheck. If MIL still
remains ON, substitute
a known-good ECM and
recheck.
1A-27
No
"BLK" wire is open or
high resistance circuit.
S5JB0E1104012
No
Go to Step 2.
Repair or replace CAN
communication circuit.