Dtc P0730 Incorrect Gear Ratio - Suzuki Wagon R RB310 Supplementary Service Manual

DTC P0730 Incorrect gear ratio

1. Input shaft speed sensor
2. Output shaft speed sensor
3. TCM
DTC DETECTING CONDITION
• Difference in detected revolution between input shaft speed sensor and output shaft speed sensor too wide.
Step
1 Check if DTC P0730 displayed with DTC
P0715 or DTC P0720.
Is DTC P0730 displayed with DTC P0715
or DTC P0720?
2 1) Turn ignition switch OFF and discon-
nect TCM couplers.
2) Measure resistance between terminal
"E12-13" of the disconnected harness
side coupler and body ground.
Is it about 0 Ω?
(See figure.)
3 Check input shaft speed sensor and out-
put shaft speed sensor referring to each
item in this section.
Are they OK?
(See figure.)
4. Shield wire
5. TCM couplers (viewed from harness side)
Action Yes
Inspect according to DTC P0715
or DTC P0720 flow table first.
Short in between shield portion
or "B" wire and ground.
• Broken wire in shield portion
or broken "B" wire, or shorted
to power source circuit.
• Malfunction of A/T itself (over
revolving of C0 clutch drum by
departing of C0 clutch drum
snap ring, clutch slipping, etc.)
If all the above are in good con-
dition, substitute a known-good
TCM and recheck.
AUTOMATIC TRANSMISSION (4 A/T) 7B-29
No
Go to Step 2.
Go to Step 3.
Inspect and replace
referring to each item in
this section.