Turn Signal/Hazard Flasher (MICU) Input Test

1.Turn the ignition switch OFF.

2.Remove the left kick panel.

3.Disconnect the driver's under-dash fuse/relay box connectors E, F, G, M, P, Q, S, and T.

NOTE: All connector views are wire side of female terminals.

 

 

4.Inspect the connector and 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 5.

5.With the under-dash fuse/relay box connectors and MICU connectors still disconnected, make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, go to 6.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
G2 ORN Under all conditions Check for voltage between G2 terminal and body ground:
There should be battery voltage. 
  • Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
G6 YEL Under all conditions Check for voltage between G6 terminal and body ground:
There should be battery voltage. 
  • Blown No. 10 (10 A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
E39 BRN Under all conditions Connect G2 and E39 terminals with a jumper wire:
The right rear turn signal light should come on. 
  • Poor ground (G701)
  • Blown bulb
  • An open in the wire
 
E40 BLU Under all conditions Connect G2 and E40 terminals with a jumper wire:
The left rear turn signal light should come on. 
  • Poor ground (G701)
  • Blown bulb
  • An open in the wire
 
F1 BRN Under all conditions Connect G2 and F1 terminals with a jumper wire:
The right front turn signal light should come on. 
  • Poor ground (G201)
  • Blown bulb
  • An open in the wire
 
G1 BLU Under all conditions Connect G2 and G1 terminals with a jumper wire:
The left front turn signal light should come on. 
  • Poor ground (G301)
  • Blown bulb
  • An open in the wire
 
M1 BLU Under all conditions Connect G2 and M1 terminals with a jumper wire:
The left side turn signal light should come on. 
  • Poor ground (G502)
  • Blown bulb
  • An open in the wire
 
M2 GRN Under all conditions Connect G2 and M2 terminals with a jumper wire:
The right side turn signal light should come on. 
  • Poor ground (G503)
  • Blown bulb
  • An open in the wire
 
P1 GRN Under all conditions Connect G2 and P1 terminals with a jumper wire:
The right turn signal indicator should come on. 
  • Poor ground (G504)
  • Faulty gauge control module (speedo)
  • An open in the wire
 
P6 BLU Under all conditions Connect G2 and P6 terminals with a jumper wire:
The left turn signal indicator should come on. 
  • Poor ground (G504)
  • Faulty gauge control module (speedo)
  • An open in the wire
 

6.Reconnect the under-dash fuse/relay box connectors and MICU connectors, then make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box assembly.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
E6 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V. 
  • Poor ground (G602)
  • An open in the wire
 
E33 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V. 
  • Poor ground (G601)
  • An open in the wire
 
F20 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V. 
  • Poor ground (G401)
  • An open in the wire
 
T34 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V. 
  • Poor ground (G501)
  • An open in the wire
 
Q11 GRN Hazard warning switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire
 
S18
·
S5 		BRN
·
BLK 		Turn signal switch in right position Check for voltage between S18 and S5 terminals:
There should be less than 0.5 V. 
  • Faulty combination light switch
  • An open in the wire
 
Turn signal switch in left or neutral position Check for voltage between S18 and S5 terminals:
There should be 5 V or more. 
  • Faulty combination light switch
  • Short to ground
 
S19
·
S5 		LT GRN
·
BLK 		Turn signal switch in left position Check for voltage between S19 and S5 terminals:
There should be less than 0.5 V. 
  • Faulty combination light switch
  • An open in the wire
 
Turn signal switch in right or neutral position Check for voltage between S19 and S5 terminals:
There should be 5 V or more. 
  • Faulty combination light switch
  • Short to ground