Honda Ridgeline. Manual — part 505
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SJC8A00J46636200000BBAT00
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General Check before Troubleshooting
Symptom Troubleshooting Using the Immobilizer Indicator Lighting Pattern
Normal operation (Lighting pattern 1)
B line open (Lighting pattern 2)
Immobilizer code is not identified (Lighting pattern 3)
Immobilizer indicator does not come on (Lighting pattern 4)
Immobilizer indicator does not go off (Lighting pattern 5)
22-316
Immobilizer System
Symptom Troubleshooting Information
Before troubleshooting the immobilizer system, check the following general items and solve any if applicable:
• The battery is low; charge the battery fully, then troubleshoot the immobilizer system.
• The ignition key is not a genuine Honda part; use the Honda- approved key blank, register the key, then troubleshoot
the immobilizer system.
• A key ring, or keys, or a key case is used; remove the key from it, and troubleshoot the immobilizer system with a
key only.
• An aftermarket electrical part is attached; remove it, then troubleshoot the immobilizer system.
The pattern of the immobilizer indicator light can help troubleshooting the condition of the immobilizer system.
Following are descriptions of the five possible patterns:
When the ignition switch is turned ON (II) and the immobilizer code is identified, the immobilizer indicator comes on
for 2 seconds, then goes off.
The immobilizer indicator blinks five times when the ignition switch is turned OFF.
When the ignition switch is turned ON (II) and the immobilizer code is identified, the immobilizer indicator comes on
for 2 seconds, then goes off.
The immobilizer indicator goes off when the ignition switch is turned OFF.
When the ignition switch is turned ON (II) but the immobilizer code is not identified, the immobilizer indicator comes
on for 2 seconds, then blinks. The state of the immobilizer key registration and the IMOCD line can be checked by
doing a SYSTEM CHECK and STATUS LOG CHECK with the HDS (see page 22-322).
The immobilizer indicator goes off when the ignition switch is turned OFF.
If the immobilizer indicator does not come on when the ignition switch is turned ON (II), check the following items:
• Check that there is battery voltage on the
B line.
• Check that the LG1 line is grounded through the PCM.
• Check for continuity between the immobilizer control unit-receiver and the gauge control module (IMOLMP line).
• Gauge control module
If the immobilizer indicator does not go off after the ignition switch is turned ON (II), check for a short to ground in the
immobilizer circuit between the gauge module and the immobilizer control unit-receiver (IMOLMP line).
*01
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Symptom Troubleshooting Using Malfunctioning Circuit Functions
System Check and Status Log
22-317
on
Line error
Function
Immobilizer
Indicator
Engine start
Key registration
Tester
communication
B line open
No blinking
when ignition
switch OFF
Possible
Impossible
Possible
IG1 line open
Does not come
Impossible
Impossible
Impossible
GND (LG1) line
open
Does not come
on
Impossible
Impossible
Impossible
S-NET line
open
Blinking
Impossible
Impossible
Possible
Possible
Possible
Possible
Possible
Possible
Possible
Does not come
on
Does not go off
Immobilizer
Indicator line
open
Immobilizer
Indicator line
short
If a malfunction occurs in the immobilizer circuit, use the following table to cross-reference the malfunctioning
function to the line(s) that should be checked:
Note: The HDS can be used to:
• Check the state of the immobilizer key registration and the IMOCD line by doing a SYSTEM CHECK.
• Check the number of times the immobilizer control unit-receiver doesn’t permit the engine to run by checking the
STATUS LOG.
1. Connect the HDS to the data link connector, then turn the ignition switch ON (II) and follow the prompts to the
MAIN MENU.
NOTE: If the HDS does not communicate with the vehicle, go to the DLC circuit troubleshooting (see page 11-194).
2. At the MAIN MENU, enter IMMOBILIZER, then select the IMMOBILIZER SET UP.
3. Do the SYSTEM CHECK. If there is a system check number, do the troubleshooting for the item indicated
(see page 22-322).
4. Check the status log using the HDS. Troubleshoot the line with the highest counts (see page 22-323). If all the lines
are ‘‘0’’ zero, the problem may not be caused by the immobilizer system, check for ignition or fuel problems.
NOTE: Once repaired, clear the status log by removing the No. 7 (7.5 A) fuse in the under-dash fuse/relay box or
disconnecting the battery.
SJC8A00J46636200000FAAT00
Order of
Priority
Symptom
Possible cause
22-318
Immobilizer System
Symptom Troubleshooting
1. Troubleshoot the immobilizer system by the order of the priority shown:
•
•
1
Immobilizer indicator blinks.
Symptom troubleshooting (see page 22-319).
2
Engine does not start with the
immobilizer key.
Symptom troubleshooting (see page 22-320).
3
Immobilizer indicator does not come
on.
Check the MIL indication.
If the MIL comes on, go to the PGM-FI system MIL
circuit troubleshooting (see page 11-184).
If the MIL does not come on, go to the gauge control
module self-diagnostic function (see page 22-244).
4
Immobilizer indicator does not go off.
Symptom troubleshooting (see page 22-321).
01
*01
SJC8A00J46636200000FAAT01
−
−
−
−
−
−
Immobilizer indicator blinks
YES
NO
YES
NO
YES
NO
22-319
IMMOBILIZER CONTROL UNIT-RECEIVER 7P CONNECTOR
IG1 (BLK/GRN)
LG1 (BRN/YEL)
IMMOBILIZER CONTROL UNIT-RECEIVER 7P CONNECTOR
NOTE: Before troubleshooting, check the following
general items and solve any if applicable:
• The battery is low; charge the battery fully, then
troubleshoot the immobilizer system.
• The ignition key is not a genuine Honda part; use the
Honda-approved key blank, register the key, then
troubleshoot the immobilizer system.
• A key ring, keys, or a key case is being used; remove
the key from it, and troubleshoot the immobilizer
system with only a key.
• An aftermarket electrical part is attached; remove it,
then troubleshoot the immobilizer system.
1. Turn the ignition switch OFF.
2. Connect the HDS, then turn the ignition switch ON
(II), and follow the prompts to the MAIN MENU.
3. At the MAIN MENU enter the IMMOBILIZER, then
select the IMMOBILIZER SETUP.
4. Select the SYSTEM CHECK.
Troubleshoot the immobilizer system
according to the result of the SYSTEM CHECK
(see page 22-322).
Go to step 5.
5. Turn the ignition switch OFF.
6. Remove the driver’s dashboard lower cover
(see page 20-83) and steering column covers
(see page 17-24).
7. Turn the ignition switch ON (II).
8. Measure voltage between the immobilizer control
unit-receiver 7P connector No. 6 terminal and body
ground.
Go to step 9.
Repair open in the BLK/GRN wire between the
under-dash fuse-relay box and the immobilizer
control unit-receiver.
9. Measure voltage between the immobilizer control
unit-receiver 7P connector No. 1 terminal and body
ground.
Repair poor connection or open between the
immobilizer control unit-receiver 7P connector
No. 1 terminal and PCM A connector (44P) No. 22
terminal.
Replace the immobilizer control unit-
receiver.
Wire side of female terminals
Wire side of female terminals
Is the SY ST EM CHECK indicated?
Is ther e batter y voltage?
Is ther e 0.5 V or mor e?
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