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Reminder System (MICU and Gauge Control Module) Input Test

NOTE: Before testing, do the gauge control module self-diagnostic function to make sure the beeper and the indicators in the gauge control module work properly, and the B-CAN and F-CAN lines are OK.
MICU
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect under-dash fuse/relay box connectors B, C, E, K, M, N, Q, and W.
    NOTE:
    • All connector views are shown from wire side of female terminals.
    • The illustration shows the RHD model and the black portion shows the lock lever. The lock lever for LHD model is shown as the dashed lines.
  1. 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 are OK, go to Step 5 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    K10
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    Q9
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    M16
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    N2
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    Q3
    GRN[LT GRN]
    Disconnect the gauge control module 32P connector
    Check for continuity between Q3 terminal and the gauge control module 32P connector No. 18 terminal: There should be continuity.
    An open in the wire
    Check for continuity to ground: There should be no continuity.
    A short to ground in the wire
    E9
    RED
    Driver's door lock knob switch in LOCK position
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch in UNLOCK position
    Check for continuity to ground: There should be no continuity.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire
    E2
    BRN
    Driver's door lock knob switch in UNLOCK position
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch in LOCK position
    Check for continuity to ground: There should be no continuity.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire
    M24
    PUR
    Front passenger's door lock knob switch in UNLOCK position
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • Faulty front passenger's door lock knob switch
    • An open in the wire
    Front passenger's door lock knob switch in LOCK position
    Check for continuity to ground: There should be no continuity.
    • Faulty front passenger's door lock knob switch
    • A short to ground in the wire
    C45
    WHT
    Right rear door lock knob switch in UNLOCK position
    Check for continuity to ground: There should be continuity.
    • Poor ground (G601) [G603]
    • Faulty right rear door lock knob switch
    • An open in the wire
    Right rear door lock knob switch in LOCK position
    Check for continuity to ground: There should be no continuity.
    • Faulty right rear door lock knob switch
    • A short to ground in the wire
    C46
    GRN
    Left rear door lock knob switch in UNLOCK position
    Check for continuity to ground: There should be continuity.
    • Poor ground (G603) [G601]
    • Faulty left rear door lock knob switch
    • An open in the wire
    Left rear door lock knob switch in LOCK position
    Check for continuity to ground: There should be no continuity.
    • Faulty left rear door lock knob switch
    • A short to ground in the wire

    [ ]:
    LHD model

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
C33
BLU
Driver's door open
Check for continuity to ground: There should be continuity.
  • Faulty driver's door switch
  • An open in the wire
Driver's door closed
Check for continuity to ground: There should be no continuity.
  • Faulty driver's door switch
  • A short to ground in the wire
C32
LT GRN
Front passenger's door open
Check for continuity to ground: There should be continuity.
  • Faulty front passenger's door switch
  • An open in the wire
Front passenger's door closed
Check for continuity to ground: There should be no continuity.
  • Faulty front passenger's door switch
  • A short to ground in the wire
C32*
LT GRN
Left rear door or right rear door open
Check for continuity to ground: There should be continuity.
  • Faulty left rear door switch
  • Faulty right rear door switch
  • An open in the wire
Left rear door and right rear door closed
Check for continuity to ground: There should be no continuity.
  • Faulty left rear door switch
  • Faulty right rear door switch
  • A short to ground in the wire
C40
GRN
Left rear door open
Check for continuity to ground: There should be continuity.
  • Faulty left rear door switch
  • An open in the wire
Left rear door closed
Check for continuity to ground: There should be no continuity.
  • Faulty left rear door switch
  • A short to ground in the wire
C26
PNK
Right rear door open
Check for continuity to ground: There should be continuity.
  • Faulty right rear door switch
  • An open in the wire
Right rear door closed
Check for continuity to ground: There should be no continuity.
  • Faulty right rear door switch
  • A short to ground in the wire
M34
GRY
Ignition key inserted into the ignition switch
Check for continuity to ground: There should be continuity.
  • Poor ground (G501)
  • Faulty ignition key switch
  • An open in the wire
Ignition switch LOCK (0), and the ignition key removed from the ignition switch
Check for continuity to ground: There should be no continuity.
  • Faulty ignition key switch
  • A short to ground in the wire
M8· M33
BLU· BLK
Combination light switch OFF
Check for continuity to ground: There should be continuity.
  • Faulty combination light switch
  • An open in the wire
Combination light switch in any other position than OFF
Check for continuity to ground: There should be no continuity.
  • Faulty combination light switch
  • A short to ground in the wire
M7· M33
GRY· BLK
Combination light switch (PARKING position) ON
Check for continuity to ground: There should be continuity.
  • Faulty combination light switch
  • An open in the wire
Combination light switch OFF
Check for continuity to ground: There should be no continuity.
  • Faulty combination light switch
  • A short in the wire
M5· M33
RED· BLK
Combination light switch (Headlight position) ON
Check for continuity to ground: There should be continuity.
  • Faulty combination light switch
  • An open in the wire
Combination light switch OFF
Check for continuity to ground: There should be no continuity.
  • Faulty combination light switch
  • A short in the wire
B26
GRN
Transmission range switch in R position
Check for continuity to ground: There should be continuity.
  • Poor ground (G101)
  • Faulty transmission range switch
  • An open in the wire
Transmission range switch in any other position than R position
Check for continuity to ground: There should be no continuity.
  • Faulty transmission range switch
  • A short in the wire

*:
Without security


Gauge Control Module
  1. Turn the ignition switch to LOCK (0).
  1. Remove the gauge control module, and disconnect the 32P connector from it.
  1. 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 are OK, go to Step 8 .
  1. With the connectors still disconnected, make these input tests at the connectors.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to Step 9 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    13
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    16
    PNK
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 1 (10 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    17
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    23
    ORN
    Parking brake switch ON (Lever pulled)
    Measure the voltage to ground: There should be less than 1 V.
    • Faulty parking brake switch
    • An open in the wire
    Parking brake switch OFF (Lever released)
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty parking brake switch
    • A short to ground in the wire
    29
    RED
    Disconnect SRS unit connector A (39P)
    Check for continuity between the No. 29 terminal and SRS unit connector A (39P) No. 16 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 29 terminal and ground: There should be no continuity.
    A short to ground in the wire
    30
    WHT
    Disconnect SRS unit connector A (39P)
    Check for continuity between the No. 30 terminal and SRS unit connector A (39P) No. 17 terminal: There should be continuity.
    An open in the wire
    Check for continuity between the No. 30 terminal and ground: There should be no continuity.
    A short to ground in the wire
    32
    LT BLU
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 22 (7.5 A) fuse in the under-dash fuse/relay box
    • Faulty ignition switch
    • An open in the wire

  1. If the lights-on reminder has a problem, substitute a known-good under-dash fuse/relay box, and recheck the system. If the seat belt reminder has a problem, check for SRS DTCs and check the seat belt buckle switch. If all the tests prove OK, go to Step 10 .
  1. Substitute a known-good gauge control module, and recheck the system.