Dtc U1100: Lost Communication With Ecm (Reception Error) - Suzuki GRAND VITARA Owner's Manual

Step
9 1) Turn ignition switch to OFF position.
2) Disconnect connectors from combination meter.
3) Recheck DTC for ABS.
Is DTC U1073 detected?

DTC U1100: Lost Communication with ECM (Reception Error)

Wiring Diagram
4
BLK/YEL
3
WHT/GRN
2
1
[A]: ABS hydraulic unit / control module connector
(viewed from terminal side)
[B]: ECM connector (viewed from harness side)
1. Battery
DTC Detecting Condition
Reception error of communication data for ECM is detected more than specified time continuously.
DTC Troubleshooting
Step
1 Was "ABS Check" performed?
2 Check DTC in ABS.
Is DTC U1073 detected?
3 1) Check for proper connection at each ABS and ECM
terminals with ignition switch turned OFF.
2) If connections are OK, recheck ABS for DTC with engine
running.
Is there DTC U1100?
4 Check DTC for ECM.
Is DTC P1674, P1676 or P1678 detected?
Action
5
WHT/BLU E03-1
12V
WHT/RED E03-14
12V
E03-7
GRN/ORN
E03-10
E03-8
BLK
E03-13
E03-26
BLK
2. Main fuse box
3. Ignition switch
4. Circuit fuse (in junction block assembly)
Action
Check ABS power and
ground circuit. If circuit
is OK, substitute a
known-good ABS
hydraulic unit / control
module assembly and
recheck.
WHT/RED WHT/RED
WHT/BLU WHT/BLU
[B]
15 14 13 12 11 10
30 29 28 27 26 25
44
45 43 42 41 40
58 57 56 55
60 59
Go to Step 2.
Go to "DTC U1073:
Control Module
Communication Bus
Off: ".
Go to Step 4.
Go to applicable DTC
diag flow.
Yes
Check combination
meter power and
ground circuit. If circuit
is OK, substitute a
known-good
combination meter and
recheck.
[A]
6
E23-4
E23-19
E23
9 8 7 6 5 4 3 2 1
20
24 23 22 21 19 18
17 16
3938 37 36 35 34 33 32 31
5453 52 51 50 49
48 47 46
5. ABS hydraulic unit / control module assembly
6. ECM
Yes
Go to "ABS Check: ".
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00".
Go to Step 5.
ABS: 4E-29
No
S5JB0A4504021
E03
14 1
15 2
16 3
17 4
18 5
19 6
20
7
21
8
22
9
23
10
24
11
25 12
26 13
I5JB0A450021-02
No