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Honda Ridgeline. Manual - part 494

＊０１

ＳＪＣ８Ａ００Ｊ３２１４６１０００００ＥＡＡＴ００

−

22-272

Reminder Systems

Circuit Diagram

•

BEEPER

MICU

without power seat

: Communication line

*2 :

’07 08 RTX models

’07 08 models with power seat

’06 model,

*1 :

BLU/YEL

X35

N44

BLK/YEL

WHT/RED

WHT/BLK

WHT/RED

GRN/ORN

INTERFACE

DRIVE CIRCUIT

G403

BLK

G501

DRIVE CIRCUIT

YEL/RED

B11

P13

DRIVE CIRCUIT

BLU/RED

C10

A10

G402

BLK

G401

SRS UNIT

F14

H14

LT GRN

X27

N28

BRN/YEL

GAUGE CONTROL MODULE

A19

A20

No.21 (7.5 A)

No.7 (7.5 A)

WHT/RED

UNDER DASH FUSE/RELAY BOX

No.15 (40 A)

No.22 (BAT) (120 A)

YEL

WHT

IG1

BAT

BLK/YEL

YEL

No.23 (IG) (50 A)

UNDER HOOD FUSE/RELAY BOX

BATTERY

IGNITION SWITCH

G401

G501

BLK

RED/WHT

BLK

IG1 HOT in ON (II) and
START (III)

BRAKE
SYSTEM
LIGHT
(LED)

LOW OIL
PRESSURE
INDICATOR
(LED)

SEAT BELT
REMINDER
LIGHT
(LED)

LIGHTS ON
INDICATOR
(LED)

POWER SUPPLY CIRCUIT/CONTROLLER
AREA NETWORK CONTROLLER

B CAN
TRANSCEIVER

COMBINATION SWITCH
CONTROL UNIT
(in the WIPER/WASHER SWITCH)

IMMOBILIZER
CONTROL
UNIT
RECEIVER

PARKING
BRAKE
SWITCH
(Closed :
Pedal pressed)
(Open :
Pedal released)

OIL
PRESSURE
SWITCH
(Closed :
Engine stopped)

DRIVER’S
SEAT BELT
BUCKLE
SWITCH
(Closed : Unbuckled)
(Open : Buckled)

IGNITION
KEY
SWITCH
(Closed :
Key inserted)

IGNITION
KEY LIGHT (LED)

UNDER DASH
FUSE/RELAY BOX

PARKING
BRAKE
REMINDER

SEAT
BELT
REMINDER

KEY IN
REMINDER

LIGHTS ON
REMINDER

＊０１

ＳＪＣ８Ａ００Ｊ２６３４３２３００５３ＦＣＡＴ１０

MICU

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not

obtained

22-273

Control Unit Input Test

UNDER-DASH FUSE/RELAY BOX
CONNECTOR E (16P)

BLK

UNDER-DASH FUSE/RELAY BOX
CONNECTOR H (14P)

BLU/RED

WHT/BLK

UNDER-DASH FUSE/RELAY BOX
CONNECTOR P (30P)

RED/WHT

BLK

NOTE: Before troubleshooting the reminder systems, key light timer, and engine oil pressure indicator system,
troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see page
22-99).

1. Turn the ignition switch OFF.

2. Remove the left front door sill trim and left kick panel (see page 20-60).

3. Disconnect under-dash fuse/relay box connectors E, H, and P (see page 22-61).

NOTE: All connectors 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 step 5.

5. With the connectors still disconnected, make these input tests at the appropriate connectors on the under-dash

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, go to step 6.

•

•
•

WHT/BLK

Under all
conditions

Attach to ground:
The ignition key light should
come on.

Blown No. 7 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty ignition key light
An open in the wire

(cont’d)

＊０２

Cavity

Wire

Test condition

Test: Desired result

Gauge Control Module

Possible cause if desired result is not

obtained

22-274

Reminder Systems

Control Unit Input Test (cont’d)

GAUGE CONTROL MODULE CONNECTOR A (20P)

GAUGE CONTROL MODULE CONNECTOR C (20P)

BLK

GAUGE CONTROL MODULE CONNECTOR B (14P)

YEL/RED

BLK

6. Reconnect the connectors to the under-dash fuse/relay box. Turn the ignition switch ON (II) and make these input

tests at the appropriate connectors on the under-dash 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, go to step 7.

•
•

•
•
•
•
•
•
•
•
•
•

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

BLK

Under all
conditions

Check for voltage to ground:
There should be less than
0.5 V.

Poor ground (G403)
An open in the wire

H14

BLU/RED

Driver’s seat belt
unbuckled

Check for voltage to ground:
There should be less than 1 V.

Faulty driver’s seat belt switch
Poor ground (G501)
An open in the wire

Driver’s seat belt
buckled

Check for voltage to ground:
There should be 5 V or more.

Faulty driver’s seat belt switch
Short to ground

P13

RED/WHT

Ignition key in
the ignition
switch

Check for voltage to ground:
There should be less than 1 V.

Faulty ignition key switch
Poor ground (G401)
An open in the wire

Ignition key out
of the ignition
switch

Check for voltage to ground:
There should be 5 V or more.

Faulty ignition key switch
Short to ground

7. Turn the ignition switch OFF.

8. Remove the gauge control module (see page 22-263).

9. Disconnect gauge control module connectors A (20P), B (14P) and C (20P).

NOTE: All connectors are wire side of female terminals.

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not

obtained

22-275

10. 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 step 11.

11. Reconnect the connectors at the under-dash fuse/relay box and the gauge control module.

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If the input tests prove OK, go to step 12.

•
•
•
•
•
•
•

•
•

B11

YEL/RED

Engine OFF

Check for voltage to ground:
There should be less than 1 V.

Faulty oil pressure switch
An open in the wire

Engine running

Check for voltage to ground:
There should be 5 V or more.

Mechanical problem in the engine
Faulty oil pressure switch
An open in the wire

A10

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

C10

BLK

Under all
conditions

Check for voltage to ground:
There should be less than
0.5 V.

Poor ground (G402)
An open in the wire

12. Do the Gauge Self-diagnostic Procedure (see page 22-244).

• If the beeper sounds and the seat belt reminder light flashes, go to step 13.
• If the beeper does not sound or the seat belt reminder light does not flash, replace the gauge control module.

13. Substitute a known-good gauge control module and recheck the system.

• If the symptom is gone, the gauge control module is faulty; replace it.
• If the symptom is still present, the MICU is faulty; replace the under-dash fuse/relay box.

Content .. 492 493 494 495 ..