Table of Contents
Advertisement
IGNITION, POWER, ACCESSORY
Symptom:
HORN RELAY CONTROL CIRCUIT OPEN - IPM
When Monitored and Set Condition:
HORN RELAY CONTROL CIRCUIT OPEN - IPM
When Monitored: Continuously.
Set Condition: The output is off and a open condition exists. Time to mature 1 second.
DTC PRESENT
FUSE #28
HORN RELAY
IPM
TEST
1
Turn the ignition on.
With the DRBIII , erase DTCs.
Turn the ignition off, wait 30 seconds, then turn the ignition on.
With the DRBIII , read DTCs.
Does the DRBIII display: HORN RELAY CONTROL CIRCUIT OPEN?
Yes → Go To 2
→ The condition that caused the symptom is not currently present.
No
2
Turn the ignition off.
Check fuse #28 in the IPM.
Is the fuse open?
Yes → Replace the fuse. Check for a short to ground in the Horn Relay
→ Go To 3
No
3
Turn the ignition off.
Install a substitute relay in place of the Horn Relay.
With the DRBIII , erase DTCs.
Turn the ignition on.
With the DRBIII , read DTCs.
Does the DRBIII display: HORN RELAY CONTROL CIRCUIT OPEN?
Yes → Replace the IPM in accordance with the Service Information.
→ Replace the Horn Relay.
No
POSSIBLE CAUSES
ACTION
Refer to any Technical Service Bulletins (TSBs) that may apply.
Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1.
Output circuit from the IPM to the horns.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
594
APPLICABILITY
All
All
All
Advertisement
Table of Contents
