Suzuki Wagon R RB310 - TCM Power and Ground Circuit Check

7B-26 AUTOMATIC TRANSMISSION (4 A/T)
TCM power and ground circuit check
1. Battery 4. Circuit fuse (IG) 7. TCM
2. Main fuse 5. Ground
3. Ignition switch 6. A/T relay
DTC DETECTING CONDITION
• Automatic transmission doesn’t shift to 1st gear at vehicle start in “D” range.
Step Action Yes No
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?
Go to Step 2. “P/Bl” wire open or faulty
A/T relay.
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?
TCM power and ground
circuits are in good condi-
tion.
“B” wire open.