Checking the preheating system
1. Turn the ignition key to position "launch", measure the burn time of the glow plug indicator lamp.
Lamp burning time is approximately 5 seconds.
2. Check glow plug time (preheating time).
Turn the ignition key to position "launch" and measure the time during which battery voltage is applied to the S-REL terminal of the timer.
The glow plugs run for approximately 18 seconds.
Check the preheat timer circuit. The timer is located under the dashboard on the passenger side.
Disconnect the connector from the preheating timer and check the connector on the wiring harness side as shown in the table.
Connector of the timer of the preheating system from the side of the wires
Checking the glow plug relay
Note: Check the glow plug relay in "Cold start assist system with additional resistance".