6-116 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)
DTC P1500 Engine Starter Signal Circuit Malfunction
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC by using scan tool, then start engine and run it for 3 min. or more.
3) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING (DTC P1500)
[A] : M/T vehicle 1. To starting motor 3. Engine start switch in ignition (main) switch
[B] : A/T vehicle 2. Transmission range sensor (switch) 4. ECM (PCM)
DTC DETECTING CONDITION TROUBLE AREA
Engine starts even though vehicle is at stop and engine start signal is not
inputted.
Engine start signal is inputted for specified time while engine is running.
(2 driving cycles detection logic)
• Engine start signal circuit
• ECM (PCM)
Step Action Yes No
1Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Ta bl e ”.
2 Check for voltage at terminal C51-3-18 of ECM
(PCM) connector connected, under following
condition.
Engine starter signal specification
While engine cranking : 6 – 14 V
After starting engine : 0 – 1 V
Is voltage as specified?
Poor C51-3-18 connection
or intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.
If wire and connections
are OK, substitute a
known-good ECM (PCM)
and recheck.
“BLK/YEL” circuit open.
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