Suzuki WagonR+ RB310 Service Manual page 2778

DTC 52 – POWER SOURCE RELAY IN TCM
(RELAY OUTPUT VOLTAGE TOO HIGH EVEN THOUGH TCM ORDERS
THE RELAY TO TURN OFF OR RELAY OUTPUT VOLTAGE TOO LOW
EVEN THOUGH TCM ORDERS THE RELAY TO TURN ON)
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 P0702 ("O/D OFF" lamp flashing
pattern 52)?
ACTION
AUTOMATIC TRANSMISSION (4 A / T) 7B-47
YES
Replace TCM.
1. Ignition switch
2. TCM coupler
(viewed from harness side)
NO
Could be a temporary
malfunction of the TCM.