Suzuki GRAND VITARA JB416 Service Manual page 61

Step
4 ECM and ABS / ESP® control module connector check
1) Check for proper connection at each ECM and ABS /
ESP® control module connector terminals with ignition
switch turned OFF.
2) If connections are OK, recheck ECM for DTC with
engine running.
Is there DTC P1685?
5 ECM power and ground circuit check
1) Check ECM power and ground circuits referring to "ECM
Power and Ground Circuit Check: in related manual".
Are they in good condition?
6 DTC check in ABS / ESP® control module
1) Check DTC U1073 in ABS / ESP® control module.
Is it indicated?
7 CAN communication circuit check
1) Disconnect connectors from ABS or ESP® control
module and ECM.
2) Check that CAN communication circuit is as follows.
• Circuit resistance of CAN communication circuit is
less than 1 Ω between "WHT/RED" terminal of ECM
connector and "WHT/RED" terminal of ABS or ESP®
connector.
• Circuit resistance of CAN communication circuit is
less than 1 Ω between "WHT/BLU" terminal of ECM
connector and "WHT/BLU" terminal of ABS / ESP®
control module connector.
Is it in good condition?
8 CAN communication circuit check
1) Connect connector to ABS or ESP® control module with
ignition switch turned OFF.
2) Measure resistance at following connector terminals.
• Between "WHT/BLU" and "WHT" terminals of ABS or
ESP® control module connector.
• Between "WHT/RED" and "RED" terminals of ABS or
ESP® control module connector.
Is resistance below 1
Action
Ω
?
Engine General Information and Diagnosis:
Yes
Go to Step 5.
Go to Step 6.
• For vehicle without
ESP®, go to "DTC
U1073: Control
Module
Communication Bus
Off: in Section 4E".
• For vehicle with
ESP®, go to "DTC
U1073: Control
Module
Communication Bus
Off: in Section 4F".
Go to Step 9.
CAN communication
circuit wire between
ABS or ESP® control
module and ECM
connector is open or
high resistance.
1A-43
No
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00 in related manual".
Repair ECM power and/
or ground circuits.
Go to Step 7.
Go to Step 8.
Substitute a known-
good ABS or ESP®
control module
assembly and recheck.