Dtc P1603: Tcm Trouble Code Detected (For J20 Engine) - Suzuki Grand Vitara 2011 Manual

DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting: For Petrol Engine Model".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Battery voltage supply circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) With engine running, measure voltage between "E23-2"
terminal of ECM connector and engine ground.
Is voltage 10 – 14 V?

DTC P1603: TCM Trouble Code Detected (For J20 Engine)

Wiring Diagram
15 14 13 12 11
30 28 27 26
29
45 44 43 42 41
59
60 58 57 56
1. ECM
Engine General Information and Diagnosis: For Petrol Engine Model 1A-176
Action
2
E92-17
RED
E92-7 WHT
E23
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
2. TCM (for A/T model)
Go to Step 2.
Poor "E23-2"
connection or
intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
If wire and connections
are OK, substitute a
known-good ECM and
recheck.
WHT/RED
WHT/BLU E23-19
WHT/BLU
E03-10
WHT/RED
RED E03-12
WHT
2 1 15 14 13 12 11
17 16 30 28 27 26
29
32 31 45 44 43 42 41
59
47 46 60 58 57 56
Yes
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
"DOME" fuse blown,
"WHT" wire is circuit
open or short circuit.
1
E23-4
3
E03-8
E03-6
C37
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
3. ABS / ESP® control module
No
S6JB0A1114063
2 1
17 16
32 31
47 46
I5JB0A110067-02