Suzuki Liana RH418, Supplementary Service Manual

Page: 278 / 371

5A-52 Automatic Transmission/Transaxle:
DTC Troubleshooting
DTC P1702 (No.52): Internal Malfunction of TCM
S3RH0B5104033
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTCs in TCM memory.
2) After passing 10 seconds from turning ignition switch ON, check DTC.
DTC Troubleshooting
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check”.
2 Is there DTC related to throttle position sensor (P0120)? Go to DTC P0120 Flow. Go to Step 3.
3 Check throttle position signal circuit for IG short
1) Turn ignition switch OFF.
2) Disconnect TCM and ECM connectors from TCM and
ECM.
3) Check proper connection to TCM at terminal “G07-6”
and to ECM at terminal “G03-14”.
4) If OK, turn ignition switch ON and measure voltage
between terminal “G07-6” of disconnected harness side
TCM connector and ground.
Is it 10 – 14 V?
“PPL/WHT” circuit
shorted to power circuit. Go to Step 4.
4 Check throttle position signal circuit for open
1) Turn ignition switch OFF.
2) Check continuity between terminal “G07-6” of
disconnected harness side TCM connector and terminal
“G03-14” of disconnected harness side ECM connector.
Is continuity indicated?
Go to Step 5. “PPL/WHT” circuit open.
5 Check throttle position signal circuit for ground short
1) Check continuity between terminal “G07-6” of
disconnected harness side TCM connector and ground.
Is continuity indicated?
“PPL/WHT” circuit
shorted to ground. Intermittent trouble or
faulty TCM or ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.
If OK, substitute a
known-good TCM or
ECM and recheck.
DTC detecting condition Trouble area
Calculation of current data stored in TCM is not correct
comparing with pre-stored checking data in TCM. TCM
Step Action Yes No
1 Is there DTC P1702 / DTC No.52 after performing “DTC
Confirmation Procedure”? Replace TCM. Could be a temporary
malfunction of TCM.