Suzuki Wagon R RB310, Supplementary Service Manual

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AUTOMATIC TRANSMISSION (4 A/T) 7B-29
DTC P0730 Incorrect gear ratio
1. Input shaft speed sensor 4. Shield wire
2. Output shaft speed sensor 5. TCM couplers (viewed from harness side)
3. TCM
DTC DETECTING CONDITION
• Difference in detected revolution between input shaft speed sensor and output shaft speed sensor too wide.
Step Action Yes No
1 Check if DTC P0730 displayed with DTC
P0715 or DTC P0720.
Is DTC P0730 displayed with DTC P0715
or DTC P0720? Inspect according to DTC P0715
or DTC P0720 flow table first. Go to Step 2.
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.)
Short in between shield portion
or “B” wire and ground. Go to Step 3.
3 Check input shaft speed sensor and out-
put shaft speed sensor referring to each
item in this section.
Are they OK?
(See figure.) • 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.
Inspect and replace
referring to each item in
this section.