Suzuki GRAND VITARA JB416, Service Manual

Page: 55 / 474

Engine General Information and Diagnosis: 1A-37
9 DTC check in ECM
1) Connect connectors to ECM and TCM with ignition
switch turned OFF.
2) Disconnect connectors from BCM with ignition switch
turned OFF.
3) Check ECM for DTC(s).
Is there DTC P1676?
Go to Step 10. CAN communication
circuit wire between
BCM and CAN circuit
junction connector is
open or high resistance.
If wires are OK, check
BCM power and ground
circuit. If circuits are OK,
substitute a known-
good BCM and recheck.
10 DTC check
1) Disconnect connector from keyless start control module
(if equipped) with ignition switch turned OFF.
2) Check ECM for DTC.
Is there DTC P1676?
Go to Step 11. CAN communication
circuit wire between
keyless start control
module and CAN circuit
junction connector is
open or high resistance.
If wires are OK, check
keyless start control
module power and
ground circuits. If
circuits are OK,
substitute a known-
good keyless start
control module and
recheck.
11 DTC check
1) Disconnect connector from combination meter with
ignition switch turned OFF.
2) Check ECM for DTC.
Is there DTC P1676?
Go to Step 12. CAN communication
circuit wire between
combination meter and
CAN circuit junction
connectors is open or
high resistance. If wires
are OK, check
combination meter
power and ground
circuits. If circuits are
OK, substitute a known-
good combination meter
and recheck.
12 DTC check
1) Disconnect connector from 4WD control module (if
equipped) with ignition switch turned OFF.
2) Check ECM for DTC.
Is there DTC P1676?
Go to Step 13. CAN communication
circuit wire between
4WD control module
and CAN circuit
injection connector is
open or high resistance.
If wires are OK, check
4WD control module
power and ground
circuits. If circuits are
OK, substitute a known-
good 4WD control
module and recheck.
Step Action Yes No