DTC P0787 (No.13): Shift / Timing Solenoid Control Circuit Low
Wiring Diagram
1. TCM [A]: Terminal arrangement of TCM connector (M13 engine model with VVT) (viewed from harness side)
2. Timing solenoid valve [B]: Terminal arrangement of TCM connector (M13 engine model without VVT) (viewed from harness side)
3. A/T      
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
Voltage of timing solenoid valve TCM terminal is low although TCM is commanding timing solenoid valve to turn ON.
Timing solenoid valve circuit shorted to ground.
Timing solenoid valve malfunction.
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC in TCM memory.
3) Start engine and shift selector lever to “N” range.
4) Repeat shifting selector lever from “N” range to “D” range and vice versa for 3 times.
5) Check DTC.
Step Action YES NO
Was A/T System Check performed?
Go to Step 2.
Check Timing Solenoid Valve Circuit for Ground Short
1) Turn ignition switch OFF.
2) Disconnect TCM connectors.
3) Measure resistance between terminal “E121-14” [A] or “E123-10” [B] 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 .
If OK, substitute a known-good TCM and recheck.
Go to Step 3.
Check Timing Solenoid Valve Resistance
1) Turn ignition switch OFF.
2) Disconnect valve body harness connector on transmission (1).
3) Check for proper connection to solenoid valve at “WHT/RED” circuit.
4) Check resistance of solenoid valve.
Resistance of timing solenoid valve
Resistance between terminal of transmission side valve body harness connector and transmission (ground (2)): 11 – 15 Ω (at 20 °C (68 °F))
Is check result satisfactory?
“WHT/RED” circuit shorted to ground.
Replace timing solenoid valve or lead wire.