Turn Signal/Hazard Relay Input Test

1.Remove the  turn signal/hazard relay (A) from the under-dash fuse/relay box (B).

2.Inspect the relay and fuse/relay box socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
  • If the terminals look OK, go to 3.

3.Make these input tests at the fuse/relay box.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, the turn signal/hazard relay must be faulty; replace it.

Cavity Teat condition Test: Desired result Possible cause if result is not obtained 
6 Under all conditions Check for votage to ground:
There should be battery voltage. 
  • Blown No. 16 (15A) fuse in the under-hood fuse/relay box
  • Faulty under-dash fuse/relay box
  • An open in the wire
 
1 Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (LHD type: G501, G601) or (RHD type: G601)
  • Faulty under-dash fuse/relay box
  • An open in the wire
 
2 Connect the No. 6 terminal to the No. 2 terminal with a jumper wire. Check the turn signal lights operation.
The left turn signal lights should come on. 
  • Blown bulb
  • Poor ground (G301, G503, G701)
  • An open in the wire
 
3 Connect the No. 6 terminal to the No. 3 terminal with a jumper wire. Check the turn signal lights operation.
The right turn signal lights should come on. 
  • Blown bulb
  • Poor ground (G201, G701)
  • An open in the wire
 
4 Ignition switch ON (II) and turn signal switch in Left position. Check for voltage to ground.
There should be about 10 V. 
  • Poor ground(LHD type: G501, G601) or (RHD type: G601)
  • Faulty turn signal switch
  • Faulty under-dash fuse/relay box
  • An open in the wire
  • Faulty combination switch control unit*
  • Faulty MICU*
 
5 Igniton switch ON (II) and turn signal switch in Right position. Check for voltage to ground.
There should be about 10 V. 
4 Hazard warning switch ON Check for voltage to ground.
There should be about 10 V. 
  • Poor ground(LHD type: G501, G601)
  • Blown No. 16 (15A) fuse in the under-hood fuse/relay box
  • Faulty under-dash fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire
  • Faulty MICU*
 
5 Check for voltage to ground.
There should be about 10 V. 

*: Go to the multiplex integrated control system test mode A troubleshooting