Turn Signal/Hazard Warning Lights (MICU) Input Test
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, make sure the No. B21 (15 A) and No. B29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. C34 (7.5 A) fuse in the under-dash fuse/relay box is OK.

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
Disconnect under-dash fuse/relay box connectors A, B, D, E, H, N, Q, and T.

NOTE: All connector views are shown from the wire side of the female terminals.
3.
Inspect the connectors 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 are OK, go to step 4.

4.
With the connectors still disconnected, do the following input tests:
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; go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
E11
YEL
Connect terminals E11 and Q13 with a jumper wire
Check the turn signal lights operation:
The left side turn signal light should come on.
Faulty LED
An open or high resistance in the wire
Poor ground (G401) or an open in the ground wire
E7
GRN
Connect terminals E7 and Q13 with a jumper wire
Check the turn signal lights operation:
The right side turn signal light should come on.
Faulty LED
An open or high resistance in the wire
Poor ground (G403) or an open in the ground wire
Q6
YEL
Connect terminals Q6 and Q13 with a jumper wire
Check the turn signal lights operation:
The left front turn signal light should come on.
Blown bulb
Poor ground (G302) or an open in the ground wire
An open or high resistance in the wire
T6
GRN
Connect terminals T6 and Q13 with a jumper wire
Check the turn signal lights operation:
The right front turn signal light should come on.
Blown bulb
Poor ground (G202) or an open in the ground wire
An open or high resistance in the wire
N4
YEL
Connect terminals N4 and Q13 with a jumper wire
Check the turn signal lights operation:
The left rear turn signal light should come on.
Blown bulb
Poor ground (G503) or an open in the ground wire
An open or high resistance in the wire
N5
GRN
Connect terminals N5 and Q13 with a jumper wire
Check the turn signal lights operation:
The right rear turn signal light should come on.
Blown bulb
Poor ground (G504) or an open in the ground wire
An open or high resistance in the wire

5.
Reconnect the connectors to the under-dash fuse/relay box, and do the following input tests:
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.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
Q15
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B29 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
Q13
TAN
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. B3 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
D23
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
H1
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
N6
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
N38
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G501)
An open or high resistance in the ground wire
H15
TAN
In all power modes
Measure the voltage to ground:
There should be battery voltage.
Blown No. B3 (10 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire
A14
PNK
Hazard warning switch pressed
Measure the voltage to ground:
There should be battery voltage.
Faulty hazard warning switch
A short to ground in the ground wire
B14
·
B10
LT GRN
·
BLK
Turn signal switch in left position
Measure the voltage between terminals B14 and B10:
There should be less than 0.2 V.
Faulty turn signal switch
An open or high resistance in the wire
Turn signal switch in right or neutral position
Measure the voltage between terminals B14 and B10:
There should be about 5 V.
Faulty turn signal switch
A short to ground in the wire
B1
·
B10
BLU
·
BLK
Turn signal switch in right position
Measure the voltage between terminals B1 and B10:
There should be less than 0.2 V.
Faulty turn signal switch
An open or high resistance in the ground wire
Turn signal switch in left or neutral position
Measure the voltage between terminals B1 and B10:
There should be about 5 V.
Faulty turn signal switch
A short to ground in the wire