Checking Ignition Relay

Checking Voltage From Ignition Relay
- Ignition OFF.
- Remove fuel pump (FP) relay position 2 in the integrated relay/fusebox on the left of the dashboard.
- Connect a cable between terminals 1 and 5 in the integrated relay/fusebox.
- Ignition ON.
- Connect a voltmeter between test output for cylinder 1 on the rear of the engine and ground.
- The voltmeter should read battery voltage.

If reading is OK:
^ Check ignition discharge modules (IDM) ground terminal (31/32) for contact resistance and oxidation and remedy.

If reading is incorrect:
^ Proceed to: Checking Ignition Relay Ground Lead section below.





Checking Ignition Relay Ground Lead
- Ignition OFF.
- Disconnect ignition relay position J in integrated relay/fusebox.
- Connect an ohmmeter between relay base terminal 4 and ground.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ Proceed to: Checking Power Supply to Ignition Relay section below.

If reading is Incorrect:
^ Proceed to: Checking Ignition Relay Ground Terminal section below.





Checking Ignition Relay Ground Terminal
- Ignition OFF.
- Ignition relay disconnected.
- Check ignition relay ground terminal (34/42) for contact resistance and oxidation and remedy.
- Connect an ohmmeter between relay base terminal 4 and ground.
- The ohmmeter should read approx. 0 ohms.

If reading is OK:
^ The cause of the fault has been loose connections in the ignition relay ground terminal.

If reading is incorrect:
^ Check cable between ignition relay terminal 4 and terminal block 34/42 in the integrated relay/fusebox for an open-circuit.





Checking Power Supply to Ignition Relay
- Ignition ON.
- Ignition relay disconnected.
- Connect a voltmeter between relay base terminals 1 and 4.
- The voltmeter should read battery voltage.

If reading is OK:
^ Proceed to: Checking Ignition Relay Signal Cable section below.

If reading is incorrect:
^ Proceed to: Checking Fuse 7 section below.





Checking Fuse 7
- Check that fuse 7 (11B/7) is intact.
- Is the fuse intact?

Yes:
^ Proceed to: Checking Voltage to Fuse 7 section below.

No:
^ Check circuit after fuse for a short-circuit to ground.





Checking Voltage to Fuse 7
- Ignition ON.
- Connect a voltmeter between the right output on the fuse holder for fuse 7 (11B/7) in the integrated relay/fusebox and ground.
- The voltmeter should read battery voltage.

Is reading is OK:
^ Check cable between fuse 7 and ignition relay terminal 1 for an open-circuit.

If reading is incorrect:
^ Check cable between fuse 7 and main relay terminal 3 for an open-circuit.





Checking Ignition Relay Signal Cable
- Ignition ON.
- Ignition relay disconnected.
- Fuel pump relay base bridged between terminals 1 and 5.
- Connect a voltmeter between relay base terminal 2 and ground.
- The voltmeter should read battery voltage.

If reading is OK:
^ Proceed to: Checking Ignition Relay section below.

If reading is incorrect:
^ Check cable between ignition relay terminal 2 and fuel pump relay (position 2) in the integrated relay/fusebox on the left of the dashboard terminal 5 for an open-circuit.





Checking Ignition Relay
- Ignition ON.
- Ignition relay disconnected.
- Fuel pump relay base bridged between terminals 1 and 5.
- Connect ignition relay to relay base.
- Press the relay into the relay base leaving access to the relay terminals.
- Connect a voltmeter between ignition relay pins (terminal 3).
- The voltmeter should read battery voltage.

If reading is OK:
^ Check cable between ignition relay terminal 3 and ignition coils terminal 2 for an open-circuit.

If reading is incorrect:
^ Try a new ignition relay.