Troubleshooting - Suzuki GRAND VITARA JB416 Service Manual

1A-26 Engine General Information and Diagnosis:

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 MIL power supply check
1) Turn ignition switch to ON position.
Do other warning lights come ON?
2 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there DTC(s) P1674 and/or P1685?
3 DTC check in ABS / ESP® control module assembly
1) Check DTC in ABS / ESP® control module assembly.
Is there DTC(s) U1073 and/or U1100?
4 DTC check in BCM
1) Check DTC in BCM.
Is there DTC U1100?
5 CAN communication line circuit check
1) Check CAN communication 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 of "DTC P1674: CAN Communication (Bus
Off Error): "
Is circuit in good condition?
6 "METER" fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown at "METER" fuse in junction block.
Is "METER" fuse in good condition?
7 Combination meter power supply check
1) Remove combination meter referring to "Combination
Meter Removal and Installation: in Section 9C in related
manual".
2) Check for proper connection to combination meter
connector at "G28-13" and "G28-15" terminals.
3) If OK, then turn ignition switch to ON position and
measure voltage between combination meter connector
at "G28-13" terminal and vehicle body ground.
Is it 10 – 14 V?
Action Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Go to applicable DTC
diag. flow.
Go to applicable DTC
diag. flow.
Go to Step 6.
Go to Step 7.
Go to Step 8.
No
Go to Step 5.
Go to Step 3.
Go to Step 4.
Substitute a known-
good combination meter
and recheck. If MIL still
remains OFF, substitute
a known-good ECM and
recheck.
Repair or replace.
Replace "METER" fuse
and check for short.
"PPL/RED" wire is open
circuit.