CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354)
CHECK IGNITION COIL ASSEMBLY (POWER SOURCE)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH ASSEMBLY)
DTC P0351 Ignition Coil "A" Primary / Secondary Circuit |
DTC P0352 Ignition Coil "B" Primary / Secondary Circuit |
DTC P0353 Ignition Coil "C" Primary / Secondary Circuit |
DTC P0354 Ignition Coil "D" Primary / Secondary Circuit |
DESCRIPTION
A Direct Ignition System (DIS) is used on this vehicle to enhance ignition accuracy and suppress high voltage losses.The DIS is an ignition system in which each cylinder is ignited by one ignition coil assembly. The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Based on the IGT signals, the ECM turns the power transistor inside the igniter on and off, turning the current to the primary coil on and off. When the current to the primary coil is cut off, a voltage is generated in the secondary coil and then applied to the spark plugs, causing them to spark inside the cylinders. At the same time, the igniter sends back the ignition confirmation (IGF) signal to the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0351 P0352 P0353 P0354 | No IGF signal is sent to the ECM while the engine is running (1 trip detection logic). |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- The following inspection procedure is for the No. 1 cylinder. If any of the other cylinders are malfunctioning, inspect their circuits by referring to the following procedure.
- If DTC P0351 is output, check the ignition coil assembly No. 1 circuit.
- If DTC P0352 is output, check the ignition coil assembly No. 2 circuit.
- If DTC P0353 is output, check the ignition coil assembly No. 3 circuit.
- If DTC P0354 is output, check the ignition coil assembly No. 4 circuit.
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.CHECK DTC OUTPUT |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
Result Result Proceed to DTC P0351, P0352, P0353 or P0354 is output A DTC P0351, P0352, P0353 and P0354 are output B
|
| ||||
| A | |
| 2.CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear the DTCs (HILUX_TGN26 RM000000PDK12LX.html).
Shuffle the arrangement of the ignition coil assemblies (among the No. 1 to No. 4 cylinders).
- NOTICE:
- Do not shuffle the connectors.
Perform a simulation test.
Check the DTCs output to the tester.
Result Result Proceed to Same DTC output A Different ignition coil assembly DTC output B
|
| ||||
| A | |
| 3.CHECK IGNITION COIL ASSEMBLY (POWER SOURCE) |
Disconnect the ignition coil assembly connectors.
 |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C70-1 (+B) - C70-4 (GND) Ignition switch ON 11 to 14 V C71-1 (+B) - C71-4 (GND) Ignition switch ON 11 to 14 V C72-1 (+B) - C72-4 (GND) Ignition switch ON 11 to 14 V C73-1 (+B) - C73-4 (GND) Ignition switch ON 11 to 14 V
Text in Illustration *a Front view of wire harness connector
(to Ignition Coil Assembly)
Reconnect the ignition coil assembly connectors.
|
| ||||
| OK | |
| 4.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) |
Disconnect the ignition coil assembly connectors.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition C70-2 (IGF) - C98-10 (IGF1) Always Below 1 Ω C71-2 (IGF) - C98-10 (IGF1) Always Below 1 Ω C72-2 (IGF) - C98-10 (IGF1) Always Below 1 Ω C73-2 (IGF) - C98-10 (IGF1) Always Below 1 Ω
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition C70-2 (IGF) or C98-10 (IGF1) - Body ground Always 10 kΩ or higher C71-2 (IGF) or C98-10 (IGF1) - Body ground Always 10 kΩ or higher C72-2 (IGF) or C98-10 (IGF1) - Body ground Always 10 kΩ or higher C73-2 (IGF) or C98-10 (IGF1) - Body ground Always 10 kΩ or higher
Reconnect the ECM connector.
Reconnect the ignition coil assembly connectors.
|
| ||||
| OK | |
| 5.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) |
Disconnect the ignition coil assembly connectors.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition C70-3 (IGT1) - C98-1 (IGT1) Always Below 1 Ω C71-3 (IGT2) - C98-2 (IGT2) Always Below 1 Ω C72-3 (IGT3) - C98-3 (IGT3) Always Below 1 Ω C73-3 (IGT4) - C98-4 (IGT4) Always Below 1 Ω
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition C70-3 (IGT1) or C98-1 (IGT1) - Body ground Always 10 kΩ or higher C71-3 (IGT2) or C98-2 (IGT2) - Body ground Always 10 kΩ or higher C72-3 (IGT3) or C98-3 (IGT3) - Body ground Always 10 kΩ or higher C73-3 (IGT4) or C98-4 (IGT4) - Body ground Always 10 kΩ or higher
Reconnect the ECM connector.
Reconnect the ignition coil assembly connectors.
|
| ||||
| OK | ||
| ||
| 6.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND) |
Disconnect the ignition coil assembly connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C70-4 (GND) - Body ground Always Below 1 Ω C71-4 (GND) - Body ground Always Below 1 Ω C72-4 (GND) - Body ground Always Below 1 Ω C73-4 (GND) - Body ground Always Below 1 Ω
Reconnect the ignition coil assembly connectors.
|
| ||||
| OK | |
| 7.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH ASSEMBLY) |
Disconnect the ignition coil assembly connectors.
Disconnect the ignition switch assembly connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition C70-1 (+B) - G9-6 (IG2) Always Below 1 Ω C71-1 (+B) - G9-6 (IG2) Always Below 1 Ω C72-1 (+B) - G9-6 (IG2) Always Below 1 Ω C73-1 (+B) - G9-6 (IG2) Always Below 1 Ω
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition C70-1 (+B) or G9-6 - Body ground Always 10 kΩ or higher C71-1 (+B) or G9-6 (IG2) - Body ground Always 10 kΩ or higher C72-1 (+B) or G9-6 (IG2) - Body ground Always 10 kΩ or higher C73-1 (+B) or G9-6 (IG2) - Body ground Always 10 kΩ or higher
Reconnect the ignition switch assembly connectors.
Reconnect the ignition coil assembly connectors.
|
| ||||
| OK | ||
| ||