Suzuki WagonR+ RB310 Service Manual page 1459

7B-48 AUTOMATIC TRANSMISSION (4 A/T)
DTC P0702/P1702 Transmission control system electrical or internal malfunction of TCM
1. TCM
2. Ignition switch
DTC DETECTING CONDITION
• Relay output voltage too high although TCM orders the relay to turn OFF or relay output voltage too low
although TCM orders the relay to turn on.
• Incorrect calculations of checking TCM programmed data indicated.
Step
1 1) Turn ignition switch ON.
2) Erase all DTCs referring to "HOW TO
CLEAR DTC" in this section.
3) Turn ignition switch OFF.
4) Turn ignition switch ON once again and
check for any DTC.
Is it DTC P1702 or P0702?
3. A/T relay
4. TCM couplers (viewed from harness side)
Action Yes
Replace TCM.
No
Could be a temporary
malfunction of the TCM.