Immobilizer-Keyless Control Unit Input Test

NOTE: Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ), and check the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 2 (15 A) fuse in the under-dash fuse/relay box.

Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
Remove the steering column covers (see COLUMN COVER REMOVAL/INSTALLATION ).
Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).

Fig 1: Locating 7P Connector And Immobilizer-Keyless Control Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

With the connector still disconnected, do these input tests at the following 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 step 6.

TEST CONDITION REFERENCE CHART

Cavity

Wire

Terminal name

Test condition

Test: Desired result

Possible cause if desired result is not obtained

GRN

S-NET (IMOCD)

Under all conditions

Check for continuity between terminal No. 3 and PCM connector A (44P) terminal No. 44⁽¹⁾ No. 46⁽²⁾ through the MICU: There should be continuity.

An open or high resistance in the wire
Faulty under-dash fuse/relay box
Bad connection at under-dash fuse/relay box connectors F or R

Check for continuity between terminal No. 3 and body ground: There should be no continuity.

A short to ground in the wire
Faulty under-dash fuse/relay box
Faulty imoes unit circuit built in the MICU

PNK

B-CAN

Under all conditions

Check for continuity between terminal No. 4 and gauge control module 36P connector terminal No. 20, and under-dash fuse/relay box connector Q (16P) terminal No. 6, and under-dash junction box connectors J, F, and L: There should be continuity.

An open or high resistance in the wire

Check for continuity between terminal No. 4 and body ground: There should be no continuity.

A short to ground in the wire

⁽¹⁾	'07-09 models

⁽²⁾	'10-11 models

Reconnect the connector, and do these input tests at the following connector.

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the immobilizer-keyless control unit.

NOTE: After replacing the immobilizer-keyless control unit, do the immobilizer registration (see IMMOBILIZER KEY REGISTRATION ).

TEST CONDITION REFERENCE CHART

Cavity	Wire	Test name	Test condition	Test: Desired result	Possible cause if desired result is not obtained
1	ORN	VBU	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 23 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
2	LT BLU	IG1	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. 2 (15 A) fuse in the under-dash fuse/relay box An open or high resistance in the wire
6	GRY	IG KEY SW	Ignition key inserted into the ignition switch	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) or an open in the ground wire Faulty ignition key switch An open or high resistance in the wire
7	BRN	LG	Under all conditions	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G101) or an open in the ground wire An open or high resistance in the wire