90.1 SPN 2623/FMI 4
This fault is typically the PWM Accelerator Pedal J1939 GAS2 signal is missing.
90.1.1
Missing PWM Accelerator Pedal GAS2 Signal Check
Check as follows:
1. Check for multiple codes:
[a] If CPC SPN 168/FMI 0/14/18 (Battery Voltage) are present troubleshoot these first.
[b] If MCM SPN 625/FMI 9 is present, troubleshoot and repair the CAN line.
[c] If only a “J1939 Error” fault is present, go to step 2.
2. Has the CPC been recently reprogrammed?
[a] If yes, check the proper configuration of the CPC.
[b] If no, connect ServiceLink to determine which modules are configured for the vehicle
and their communication status. Once this is done, follow the appropriate module
communication troubleshooting procedures for the affected module.
90.2 SPN 2623/FMI 14
This fault is typically the PWM Accelerator Pedal J1939 GAS1 and GAS2 signals are missing.
90.2.1
Missing PWM Accelerator Pedal GAS1 and GAS2 Signal Check
Check as follows:
1. Check for multiple codes:
[a] If CPC SPN 168/FMI 0/14/18 (Battery Voltage) are present troubleshoot these first.
[b] If MCM SPN 625/FMI 9 is present, troubleshoot and repair the CAN line.
[c] If only a “J1939 Error” fault is present, go to step 2.
2. Has the CPC been recently reprogrammed?
[a] If yes, check the proper configuration of the CPC.
[b] If no, connect ServiceLink to determine which modules are configured for the vehicle and their communication status. Once this is done, follow the appropriate module communication
roubleshooting procedures for the affected module.
