5A-56 Automatic Transmission/Transaxle:
DTC P0788: Shift / Timing Solenoid High
S7RS0B5104030
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF, if available.
2) Clear DTC in TCM memory.
3) Start engine and shift select lever to “N” range.
4) Repeat shifting select lever from “N” range to “D” range and vice versa for 3 times.
5) Check DTC.
DTC Troubleshooting
1. TCM 3. A/T
2. Timing solenoid valve [A]: Terminal arrangement of TCM connector (viewed from harness side)
DTC detecting condition Trouble area
Voltage of timing solenoid valve TCM terminal is high
although TCM is commanding timing solenoid valve to turn
OFF.
• Timing solenoid valve circuit open or shorted to
power circuit
• Timing solenoid valve malfunction
•TCM
12V
C34-14
BLU/BLK
3
1
2
14
C34
C35
[A]
I4RS0A510014-01
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check”.
2 Check timing solenoid valve circuit for IG short
1) Disconnect TCM connectors.
2) Turn ignition switch ON and measure voltage between
terminal “C34-14” of harness side TCM connector and
ground.
Is it 0 – 1 V?
Go to Step 3. “BLU/BLK” circuit
shorted to power circuit.
3 Check timing solenoid valve circuit for open
1) Measure resistance between terminal “C34-14” of
disconnected harness side TCM connector and ground.
Is it 11 – 15
Ω
at 20
°
C (68
°
F)?
Intermittent trouble or
faulty TCM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
If OK, substitute a
known-good TCM and
recheck.
Go to Step 4.
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