Suzuki WagonR+ RB310 Service Manual page 1437

7B-26 AUTOMATIC TRANSMISSION (4 A/T)
TCM power and ground circuit check
1. Battery
2. Main fuse
3. Ignition switch
DTC DETECTING CONDITION
• Automatic transmission doesn't shift to 1st gear at vehicle start in "D" range.
Step
1 1) Disconnect TCM coupler with ignition switch
OFF.
2) Check for proper connection to TCM at
"E13-2" terminal.
3) If OK, turn ignition switch ON and check
voltage at terminal "E13-2" of disconnected
TCM coupler.
Is it 10 – 14 V?
2 1) Turn ignition switch OFF.
2) With TCM couplers disconnected, check for
proper connection to TCM at "E13-15" ter-
minal.
3) If OK, check resistance between "E13-15"
terminal of disconnected TCM coupler and
body ground.
Is continuity indicated?
4. Circuit fuse (IG) 7. TCM
5. Ground
6. A/T relay
Action Yes
Go to Step 2.
TCM power and ground
circuits are in good condi-
tion.
No
"P/Bl" wire open or faulty
A/T relay.
"B" wire open.